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NASA Is Offerring $1 Million To Turn CO2 Into Sugar (space.com)

NASA is challenging people in the United States to come up with an efficient method to convert carbon dioxide into glucose, a simple sugar. The atmosphere of Mars consists predominantly of CO2 (95%), and glucose is a great fuel for microbe-milking "bioreactors" that could manufacture a variety of items for future settlers of the Red Planet, NASA officials said. Space.com reports: The new competition consists of two phases. During Phase 1, applicants submit a detailed description of their CO2-to-glucose conversion system. Interested parties must register by Jan. 24, 2019 and submit their proposals by Feb. 28, 2019. In April, NASA will announce the selection of up to five finalists from this initial crop, each of whom will receive $50,000. Phase 2 will involve the construction and demonstration of a conversion system. Winning this round is worth $750,000, bringing the competition's total purse to $1 million (assuming five finalists are indeed selected from Phase 1). You don't have to win, or even participate in, Phase 1 to compete in Phase 2. The challenge is open to citizens and permanent residents of the United States; foreign nationals can compete if they're part of a U.S.-based team. To register or learn more, go to the CO2 Conversion Challenge website.

174 comments

  1. It would be better by Vinegar+Joe · · Score: 4, Funny

    To turn CO2 into beer. And pay $1 Billion.

    --
    "The average reporter we talk to is 27 years old......They literally know nothing." - Ben Rhodes
    1. Re:It would be better by Anonymous Coward · · Score: 0

      I'd rather turn it into vodka.

    2. Re:It would be better by DontBeAMoran · · Score: 4, Funny

      I say potato, you say vodka.

      --
      #DeleteFacebook
    3. Re:It would be better by TomBauserman · · Score: 1

      If you turned it into beer. How would you carbonate the beer?

    4. Re:It would be better by msauve · · Score: 1

      Make Guinness and use nitrous.



      (yeah, I know it's a gas mix)

      --
      "National Security is the chief cause of national insecurity." - Celine's First Law
    5. Re:It would be better by Anonymous Coward · · Score: 0

      To turn CO2 into beer. And pay $1 Billion.

      If you've turned CO2 into sugar, you can make something resembling beer ... or something resembling vodka if you have the gear and the know how.

      Alcohol is just a side effect of fermenting sugar with the right kind of yeast.

    6. Re:It would be better by Anonymous Coward · · Score: 0, Offtopic

      I'm never gonna get away from this trump hate. Even the editors of a news website openly flaunt their bias because it's become so normalised to be ultra partisan.

    7. Re:It would be better by Anonymous Coward · · Score: 0, Troll

      Trump University

      Trump Steaks

      Trump Airlines

      Trump Vodka

      GoTrump.com (travel web site)

      Trump Mortgage

      Trump Magazine

      Trump Ice (bottled water)

      New Jersey Generals (American Football team)

      Tour de Trump (bicycle race)

      The Trump Network (MLM vitamins)

      Trump New Media (ISP)

      Atlantic City casino(s)

      I'm sure I missed some.

    8. Re:It would be better by mewsenews · · Score: 1

      Fermentation gives off CO2, I think it would be damn near impossible to fuel the process using CO2

    9. Re:It would be better by Zorro · · Score: 1

      To make Rum on Mars.

    10. Re:It would be better by Anonymous Coward · · Score: 0

      Fermentation gives off CO2, I think it would be damn near impossible to fuel the process using CO2

      Well, in a sealed system ... you convert the human emitted CO2 and the beer emitted CO2 and turn it into sugar.

      Perpetual freakin' motion I tell's ya!! ;-)

    11. Re:It would be better by Anonymous Coward · · Score: 0

      That already exists, its called plants and fungi.

    12. Re:It would be better by q_e_t · · Score: 1

      You could do CO2->Sugar->Beer and collect $1.001 billion.

    13. Re:It would be better by ebvwfbw · · Score: 1

      If you can get sugar, Rum isn't far behind. Know what's not far behind that? Pirates.

    14. Re:It would be better by Anonymous Coward · · Score: 0

      You forgot the board game.

    15. Re:It would be better by ananamouse · · Score: 1

      >And then proceeded to vote for this scuzball?
      Have you internalized that the Indiana evangelical voters broke for Trump over Cruze? They had thier eyes wide open.
      Not only were they not fooled, they were quite fed up with being fooled from the look of it.
      They clearly saw that Cruze, nor any of the other establishment choices, nor Romney, nor Mcain before them gave a shit about record levels of black unemployment and were not going to lift a finger to help Blacks or anyone else.
      Bless his heart, Obama did get rid of Pelosi, Reid, bin Sadin, and kept Hilary out of the white houes.
      >/<

  2. Plants & CO2 & sunlight by Alain+Williams · · Score: 4, Interesting

    Where do I claim my prize ?

    1. Re:Plants & CO2 & sunlight by Rei · · Score: 5, Interesting

      The key is "efficient". Sugar crops as a whole generally only yield a fraction of a percent of their received solar energy as sugar. Even just considering the leaves alone, they only net about 5% net sugar yield.

      If you want efficiency, you're going to want a direct chemical process. I looked into this at one point and was surprised at how complicated it appears to be to make simple sugars, in terms of the number of requisite steps. Much simpler would probably be a direct conversion to fatty acids; they're carboxylic acids and there's a number of ways to directly synthesize free carboxylic acids from simple raw materials (the main challenge would be specificity)

      --
      They carry weapons and they know if you've been bad or good. Not everybody's good, but everyone tries.
    2. Re:Plants & CO2 & sunlight by Excelcia · · Score: 1

      The key is "efficient". Sugar crops as a whole generally only yield...

      But it's not as if space is at a premium on Mars, though, is it? Far more useful than an efficient way of turning CO into glucose is an efficient way of turning CO into PE or polycarbonate. Once you can make the domes in situ, the rest is pretty darn easy.

      I mean, sure, it's not quite as easy as that. You want to, at the same time, breed plants to operate at as high an altitude as possible and/or breed lichens to grow faster and/or produce more sugar. But overall, I think we'll find that adapting what works now is better and easier than trying to come up with whole new ways of doing things.

    3. Re: Plants & CO2 & sunlight by Anonymous Coward · · Score: 0

      But you'll need green houses, some kind of atmospheric processing and so on for plants to grow, whereas I guess an hypothetical CO2 processor could be dropped somewhere and leave its own life as long as it has power.

    4. Re: Plants & CO2 & sunlight by Anonymous Coward · · Score: 0

      Live... Damn spell checker.

    5. Re: Plants & CO2 & sunlight by Anonymous Coward · · Score: 5, Funny

      Especially something like potatoes. We can science the shit out of this.

    6. Re:Plants & CO2 & sunlight by stevelinton · · Score: 2

      I'm sure this is a valid approach, but I think they will want more detail. What plants? What kind of structure will you grow them in? Will they need soil, if so, how much? Can they grow in pure CO2 (and at what range of pressures)? If not, what other gases will they need? What additional nutrients will they need? Will you be able to recycle those nutrients from what's left of the plants after you extract the glucose? etc.?

    7. Re: Plants & CO2 & sunlight by fuzzyfuzzyfungus · · Score: 4, Insightful

      I'd imagine that Mars would be a case where much more intensive cultivation practices would make sense(compared to the cost of shipping pretty much any crazy hydroponics setup looks like a rounding error; and nobody is going to worry too much about your genetically engineered sugar-algae escaping into the pristine Martian oceans; but that space would be at something of a premium:

      If you want to use it you need to enclose it(or excavate it and seal as needed), heat it; quite likely light it; and initial reports are that the local soil may have perchlorates that need to be dealt with, in addition to just having absolutely zero accumulated humus, just mineral sand and dust, if you want to try non-hydroponic techniques.

      Even so, though, something resembling agriculture (potentially with algae or e coli with plant genes spliced in or something; but using biological sugar synthesis rather than some sort of industrial chemical synthesis: if you are 6 months and a lot of money away from spare parts/fresh reagents/replacement catalyst bits, the ability of organisms to reproduce themselves a new population could come in very handy indeed. Keep a bunch of samples of the relevant organisms in storage(cryo, dried seeds, etc.) and you'll be much more resilient: worst case you have to irradiate the grow vats until the contaminant organisms are cleared out, then restart from a frozen sample.

      They have their limits, some very annoying, and our understanding of how to control them is still a work in progress; but it's still the case that biology has effectively delivered replicator nanites a billion-odd years before robotics. And on a planet where you can't just FedEx in spares if something goes unexpectedly badly that could be quite useful.

    8. Re:Plants & CO2 & sunlight by RandomFactor · · Score: 2

      While parent is basically a throwaway, there's a grain of truth to it completely by accident.

      If there was a reasonably accessible way to do this more efficiently, plants would use that instead of photosynthesis.

      Doesn't mean there is no way to do it, but it's not likely going to be some obvious or simple process that nature could have managed on its own.

      --
      --- Mercutio was right.
    9. Re:Plants & CO2 & sunlight by Anonymous Coward · · Score: 3, Informative

      If there was a reasonably accessible way to do this more efficiently, plants would use that instead of photosynthesis.

      Not necessarily. There is a lot of interesting electrochemistry you can do, if you have access to 12V from photovoltaic panels. Plants do none of that, they never developed any kind of electronics. Generally, you can create energy-rich chemicals, some of which may be useful precursors to sugar synthesis. Also, chemistry may use steps nature avoids - because something too extreme (poisonous, temperature, pressure) is involved. Plants have a narrow temperature range compared to a factory - and do everything at normal atmospheric pressure.

      The clorophyll process is likely optimal as-is though.

    10. Re:Plants & CO2 & sunlight by msauve · · Score: 2

      " it's not as if space is at a premium on Mars, though, is it?"

      Pressure, temperature, and atmosphere controlled space is.

      --
      "National Security is the chief cause of national insecurity." - Celine's First Law
    11. Re:Plants & CO2 & sunlight by Anonymous Coward · · Score: 0

      I wouldn't say that chlorophyll is optimal, per se. I'd pick cyanobacteria over anything green.

    12. Re:Plants & CO2 & sunlight by squiggleslash · · Score: 1

      If there was a reasonably accessible way to do this more efficiently, plants would use that instead of photosynthesis.

      I don't think that logically follows. After a while it's unnecessary for evolution to optimize a process, it works, and the mutations required to improve things are improbable.

      It's not like human legs are likely to evolve into wheels any time soon.

      --
      You are not alone. This is not normal. None of this is normal.
    13. Re:Plants & CO2 & sunlight by CaptainDork · · Score: 1

      Interesting proposal. I'm weighing the specific gravity.

      --
      It little behooves the best of us to comment on the rest of us.
    14. Re: Plants & CO2 & sunlight by CaptainDork · · Score: 1

      I see where you're going with this.

      We can manufacture plastic, no ... make that biodegradable ... noses, ears, hands, lips, and stuff to make potato heads and sell it as, "Artificial Intelligence," with the disclaimer that, as with the current state of the technology, it's "For entertainment purposes, only."

      --
      It little behooves the best of us to comment on the rest of us.
    15. Re:Plants & CO2 & sunlight by CaptainDork · · Score: 1

      What protective strategies will fend off hackers who want to embed malicious worms and viruses?

      --
      It little behooves the best of us to comment on the rest of us.
    16. Re:Plants & CO2 & sunlight by vtcodger · · Score: 3, Informative

      Were it easy to convert CO2 (plus Water incidentally) to sugar ( 6CO2 + 6H2O --> C6H12O6 + 6O2)), plants would probably do it more efficiently already. Really, what else do they have to do?

      BTW, plants don't have to create glucose per. se.. Starch (Potatoes, Casava, Taro, etc) is easily broken down to glucose by adding a bit of hydrochloric acid.

      --
      You can't see ANYTHING from a car, You've got to get out of the goddamned contraption and walk...Edward Abbey
    17. Re:Plants & CO2 & sunlight by crunchygranola · · Score: 1

      The competition states:

      "The use of a bioreactor is not allowed as a component in the conversion of CO2 to products"

      I would say that a greenhouse is a special case of "bioreactor."

      Also note that bit about "efficient". Photosynthesis is at best 2% efficient, which assumes an optimal system and all products of the conversion counted. Any system producing glucose as the product is going to be a fraction of that.

      --
      Second class citizen of the New Gilded Age
    18. Re:Plants & CO2 & sunlight by meglon · · Score: 1

      I'm thinking a single blackberry vine. In just a couple of years it will have over grown the entire damn planet, and nothing short of taking off and nuking it from orbit will slow it's growth.

      --
      Fascism: An authoritarian and nationalistic right-wing system of government and social organization. See also: NAZI's
    19. Re:Plants & CO2 & sunlight by angel'o'sphere · · Score: 1

      The clorophyll process is likely optimal as-is though.
      Considering that a single electron is 'trigerring' or 'performing' it, yes.

      they never developed any kind of electronics.
      They did! But instead of transporting electrons, they transport protons.

      --
      Cost free eBook I read (by iBook/Kobo/Amazon/ObookO/Gutenberg etc.): "The Green Odyssey" by Philip Jose Farmer.
    20. Re:Plants & CO2 & sunlight by angel'o'sphere · · Score: 1

      It's not like human legs are likely to evolve into wheels any time soon.
      That would suck! Somehow I like kissing the legs of my GF.

      --
      Cost free eBook I read (by iBook/Kobo/Amazon/ObookO/Gutenberg etc.): "The Green Odyssey" by Philip Jose Farmer.
    21. Re:Plants & CO2 & sunlight by Jerry · · Score: 2

      The key is "efficient". Sugar crops as a whole generally only yield a fraction of a percent of their received solar energy as sugar. Even just considering the leaves alone, they only net about 5% net sugar yield.

      If you want efficiency, you're going to want a direct chemical process. I looked into this at one point and was surprised at how complicated it appears to be to make simple sugars, in terms of the number of requisite steps. Much simpler would probably be a direct conversion to fatty acids; they're carboxylic acids and there's a number of ways to directly synthesize free carboxylic acids from simple raw materials (the main challenge would be specificity)

      You ignore the fact that the majority of any "sugar" crop is cellulose, a polymer of sugar. Since you want to jump to chemical processes right off the bat then add enzymes to cellulose pulp that converts it to sugar.

      --

      Running with Linux for over 20 years!

    22. Re:Plants & CO2 & sunlight by angel'o'sphere · · Score: 1

      Also note that bit about "efficient". Photosynthesis is at best 2% efficient,
      That is nonsense.
      Photosynthesis is probabaly the most efficient process on the planet. A single electron triggered by a single photon is performing the proton transport to build up starch or sugar.
      What do kids learn in our days in school?

      --
      Cost free eBook I read (by iBook/Kobo/Amazon/ObookO/Gutenberg etc.): "The Green Odyssey" by Philip Jose Farmer.
    23. Re: Plants & CO2 & sunlight by Anonymous Coward · · Score: 0

      We can manufacture plastic, no ... make that biodegradable ... noses, ears, hands, lips, and stuff to make potato heads and sell it as, "Artificial Intelligence," with the disclaimer that, as with the current state of the technology, it's "For entertainment purposes, only."

      Do it with a sweet potato, and call it Mr. POTatUS head.

    24. Re: Plants & CO2 & sunlight by CaptainDork · · Score: 1

      Plants & CO2 & sunlight

      Sunlight is orange at daylight sometimes, but it doesn't have a Twitter account.

      --
      It little behooves the best of us to comment on the rest of us.
  3. trees? by Anonymous Coward · · Score: 0

    trees?

  4. Another NASA screw up... by Anonymous Coward · · Score: 0

    .. and when the microbes thrive and the CO2 declines... the temperature will go down as well due to loss of a greenhouse gas. Then mars will be too cold. Why screw one planet when you can screw more?

  5. Where does the Hydrogen come from? by Grog6 · · Score: 4, Interesting

    Glucose has Carbon Hydrogen and Oxygen.

    For every 6 CO2 molecules and Water molecules you put in, you get 1x glucose molecule, and 1x O2 molecule.

    That's at 100% efficiency.

    Water and CO2 are the two lowest energy states for those atoms, so it takes a lot of energy too.

    With unlimited solar, anything's possible, but it will be interesting to watch.

    --
    Truth isn't Truth - Guliani
    1. Re:Where does the Hydrogen come from? by Pollux · · Score: 2

      Maybe from here.

      Course, knowing where it is is one thing. Knowing how to extract it efficiently is quite another.

    2. Re:Where does the Hydrogen come from? by Anonymous Coward · · Score: 0

      Water.... And they are constantly looking for water on Mars.

    3. Re:Where does the Hydrogen come from? by phayes · · Score: 2

      The target is Mars which has been determined to have enough subsurface water ice that were it lall iquid would cover Mars wit a global ocean 30 meters deep: https://en.wikipedia.org/wiki/...

      --
      Democracy is a sheep and two wolves deciding what to have for lunch. Freedom is a well armed sheep contesting the issue
    4. Re:Where does the Hydrogen come from? by AmiMoJo · · Score: 1

      Assuming say 10% efficiency how much energy and CO2/water would it take to provide a human adult's daily recommended sugar intake, I wonder.

      --
      const int one = 65536; (Silvermoon, Texture.cs)
      SJW, n: "Someone I don't like, and by the way I'm a fuckwit" - AC
    5. Re:Where does the Hydrogen come from? by Cyberax · · Score: 2

      Humans need around 2000 food calories per day or around 8MJ. Assuming 10% efficiency that's 80MJ of energy needed. If you want to get it over 24 hours that'd require around 1kWt of continuous power.

    6. Re:Where does the Hydrogen come from? by AmiMoJo · · Score: 1

      Sure by presumably they aren't expecting people to live off sugar alone.

      --
      const int one = 65536; (Silvermoon, Texture.cs)
      SJW, n: "Someone I don't like, and by the way I'm a fuckwit" - AC
    7. Re:Where does the Hydrogen come from? by taiwanjohn · · Score: 2

      For every 6 CO2 molecules and Water molecules you put in, you get 1x glucose molecule, and 1x O2 molecule.

      Glucose is C6-H12-O6... I'm pretty sure you'd get 6x O2 molecules, not 1x.

      --
      XML is like violence. If it doesn't solve your problem, you're not using enough of it. --AC
    8. Re:Where does the Hydrogen come from? by Anonymous Coward · · Score: 0

      If you have the energy to do this, you have the energy to convert glucose to something else.

    9. Re:Where does the Hydrogen come from? by AnotherBlackHat · · Score: 1

      You have to dig deep to find it, but according to the rules of the contest;

      The source CO2 and hydrogen can be supplied from a commercially available pure gas (i.e., tanked CO2 and H2), or verifiably obtained from an alternate source (e.g., H2 from water electrolysis).

      Pretty big "detail" to leave out of the press release, IMO.

    10. Re:Where does the Hydrogen come from? by CaptainDork · · Score: 1

      Forward thinking is a must.

      If our intent is to extract all the water and put on the surface, what, precisely, are the ramifications for the structure we removed the water from?

      --
      It little behooves the best of us to comment on the rest of us.
    11. Re:Where does the Hydrogen come from? by Anonymous Coward · · Score: 1

      I'd skip solar entirely and go straight to nuclear power. You can't rival the energy density and portability, and I imagine you're going to want something that can make a lot of glucose quickly and reliably. Solar means you're one dust storm away from losing a rover, etc.

    12. Re:Where does the Hydrogen come from? by phayes · · Score: 1

      Strip mine it or drill in areas where there'll be liquid subsurface water as is now suspected. Neither would have much of any impact at the levels any colonists would be capable of for decades. If future exploitation is deemed to have a deleterious impact there will be more than enough time to restrict methods in the future.

      Why do you think that we need to go into minutia now?

      --
      Democracy is a sheep and two wolves deciding what to have for lunch. Freedom is a well armed sheep contesting the issue
    13. Re:Where does the Hydrogen come from? by CaptainDork · · Score: 1

      Why do you think that we need to go into minutia now?

      well, duh.

      It's right there in the Constitution:

      A well regulated minutia ...

      You're so unAmerican.

      If you are not from America:

      We should worry about the goddam details before we shit in our mess kit.

      DON'T TREAD WATER ON MARS OR GIVE ME DEATH!

      --
      It little behooves the best of us to comment on the rest of us.
    14. Re:Where does the Hydrogen come from? by Cyberax · · Score: 1

      If you have sugar, you can fairly easy make starch. You can also synthesize fats if you need to.

    15. Re:Where does the Hydrogen come from? by phayes · · Score: 1

      Someone has been shitting in your mess kit if you think that the impact of water mining on mars would need to be excessively over detailed NOW.

      --
      Democracy is a sheep and two wolves deciding what to have for lunch. Freedom is a well armed sheep contesting the issue
    16. Re:Where does the Hydrogen come from? by CaptainDork · · Score: 1

      1800 California:

      ... water mining on mars would need to be excessively over detailed NOW ...

      --
      It little behooves the best of us to comment on the rest of us.
    17. Re:Where does the Hydrogen come from? by phayes · · Score: 1

      What part of "There is enough subsurface water on Mars to submerge the entire planet 30 meters deep" don't you understand? Ah, you appear to be from SoCal. Never mind, clearly asking too much from you...

      --
      Democracy is a sheep and two wolves deciding what to have for lunch. Freedom is a well armed sheep contesting the issue
    18. Re:Where does the Hydrogen come from? by CaptainDork · · Score: 1

      1.) "Ah, you appear ..." Why are you making this personal? Are you reaching?

      2.) "... asking too much from you ..." Same question.

      What part of "Fuck, we're almost out of water." do you not get?

      We did it here; we can do it there.

      --
      It little behooves the best of us to comment on the rest of us.
    19. Re:Where does the Hydrogen come from? by phayes · · Score: 1

      Again, what part of "There is enough subsurface water on Mars to submerge the entire planet 30 meters deep" don't you understand? Given that you make useless comparisons with southern California, it's the MARS part.

      That SoCa has overused it's fresh water supplies has absolutely nothing to do with Mars colonists being able to overuse theirs. Not everything is about you and your mistakes so your "lessons learned" are not applicable and thus your excessively over detailed impact planning is equally useless.

      You're like a guy that once ran out of salt and now wants to exhaustively preplan the use of every grain of salt -- when he could just go to the store and buy more because it's in no danger of becoming rare or expensive. Your cries of BUT I RAN OUT ONCE are grating.

      --
      Democracy is a sheep and two wolves deciding what to have for lunch. Freedom is a well armed sheep contesting the issue
  6. Worth so much more than $1 million by fintux · · Score: 2

    If a very efficient method for this was found, it would be worth so much more on Earth. The sugar could be used as a relatively high-density, stable, easy-to-transport energy storage - and if not viable directly, then for could be used for example through fermentation to alcohol as well (though I don't know how efficient that process is).

    1. Re:Worth so much more than $1 million by Anonymous Coward · · Score: 0

      Yes, indeed. But peoples are so focus on "renewable energy", they forget about this. They are totally duped by dumb ass politicians.

    2. Re:Worth so much more than $1 million by Megol · · Score: 1

      Yes one can use it to store energy but how exactly can the stored energy be extracted later? Fermentation to alcohol and then a combustion engine alternatively fuel cell is the only reasonable one I can come up with.

    3. Re: Worth so much more than $1 million by Anonymous Coward · · Score: 0

      Thank you for pointing out that 1 million is working for peanuts, people just don't understand huge numbers, we have some companies near a trillion in valuation; your homework what percent is one mil to 1 trillion?

    4. Re:Worth so much more than $1 million by fintux · · Score: 1

      Yes, exactly - that's why I wrote that "if not viable directly". But there is at least some research also on glucose fuel cells.

  7. Re:Forget Mars by DarenN · · Score: 5, Insightful

    If a chemical process works on Mars it will almost certainly work here. It's also possible that this is Mars-focused to avoid the inevitable political wrangling if it was directly aimed at climate change.

    --
    Rational thought is the only true freedom
  8. Yeah, that's kinda what I mean... by Grog6 · · Score: 2

    The only way something like this works is if there's a good source of Treatable water.

    If you have to run it thru a desalination plant, that likely includes perchlorates, it's going to be even that much harder.

    A rocky mountain stream might be easily usable; ice dissolved into rock formations, or even covered with mars soil, is another problem.

    It's true that vacuum stills would work pretty well, so it's not impossible, just Almost impossible. :)

    --
    Truth isn't Truth - Guliani
    1. Re:Yeah, that's kinda what I mean... by phayes · · Score: 2

      Processing even very salty water on mars is not a significant problem. Just like on Earth, if you freeze water, almost pure H20 floats to the top where it can be collected. Perchlorates are merely a particuler form of salt.

      --
      Democracy is a sheep and two wolves deciding what to have for lunch. Freedom is a well armed sheep contesting the issue
    2. Re:Yeah, that's kinda what I mean... by crunchygranola · · Score: 3, Interesting

      The only way something like this works is if there's a good source of Treatable water.

      If you have to run it thru a desalination plant, that likely includes perchlorates, it's going to be even that much harder.

      ...

      Water is found in the regolith ("soil") of Mars everywhere in significant quantities. You will have to strip mine it, but as mining operations go it is easy to get. From The microbial case for Mars and its implication for human expeditions to Mars, Gerda Horneck, Acta Astronautica 63 (2008) 1015 – 1024:

      From the global neutron mapping of the Mars Odyssey mission, the present distribution of water in the shallow subsurface was divided in four types of regions: (i) regions with dry soil with a water content of about 2 wt%; (ii) northern permafrost regions with a high content of water ice (up to 53 wt% of water); (iii) southern permafrost regions with high content of water ice (>60 wt% of water) covered by a dry layer of regolith; and (iv) regions with water-rich soil at moderate latitudes (about 10 wt% of water).

      So we get to decide how important the water content is when selecting a site to set up operations. At worst the content would be 2%, or 20 liters per tonne, but we may prefer those "moderate latitudes" with 100 liters per tonne. Extraction would involve simply heating the soil in a retort and condensing the escaped water. You will be digging up a lot of soil (especially in the 2% case) and discarding it as the water is extracted.

      Preparing regolith for use as a cultivation medium will probably take a few steps, but removing the perchlorates will be the easiest of those steps. Simply use said water to extract them as perchlorates are highly water soluble. Hydroponics is all about circulating water through a growing medium, so extraction of all soluble compounds is inherently part of the operation. I suspect that some sort of granulating/pelletizing process would be used to get an appropriate porosity. Martian regolith is naturally high in phosphorus and potassium, and trace elements, so the only thing lacking is usable nitrogen. A Haber process system to make ammonia is the most likely way of getting that, and the ammonia could be dissolved directly in the water. A bit different from how hydroponics is done on Earth, which used an inert medium with all the nutrients in solution, but not that different.

      --
      Second class citizen of the New Gilded Age
  9. Re:better to spend on not having cane sugar by Anonymous Coward · · Score: 0

    remember kid, don't do drugs.

    passphrase === 'patriots'

  10. Just what we need... by XB-70 · · Score: 2

    Newsflash, 09-Sep-2021: In a major announcement today, McDonald's has perfected the process by which to convert CO2 into sugar. They are now scrubbing the CO2 out of the air in their restaurants and, using the new process, producing sugar which is going directly into milk shake production. Oh, and NASA may use this system on Mars.

    --
    *** Don't be dull.***
    1. Re:Just what we need... by aaronb1138 · · Score: 1

      But the shake machine is broken or being cleaned. What quantum entanglement fuckery is this?

  11. Don't plants already to this? by labradort · · Score: 2

    Pick a plant. They all convert light and CO2 to sugar. In terms of efficiency it depends on what is being measured. If it is the object's size vs their output over time, that it one way to look at efficiency. If it is a huge forest of maple trees, a field of sugar cane, or beet plants, they don't need much maintenance. Entire forests exist without any human effort, electricity, chemical additive, etc.

    Anyway, the research seems kinda pointless after NASA just announced Terra-forming Mars won't be possible for many reasons. I will let NASA explain why...

    https://www.nasa.gov/press-rel...

    Mars just happens to look like an Earth desert in pictures. It doesn't mean it just needs oxygen and water and then go.

    1. Re:Don't plants already to this? by pz · · Score: 2

      Plants need water, generally speaking. And, generally speaking, there isn't much of that on Mars since, as you point out, it's largely desert-like.

      So, some other method is going to be required for Martian use, and we can reasonably expect that it will not be so useful for terrestrial use because the conditions are so different.

      --

      Put my fist through my alarm clock with its ding-dong death inside my ear. - The Blackjacks.
    2. Re:Don't plants already to this? by Anonymous Coward · · Score: 0

      Thanks for the link to NASA paper. The problem with terraforming Mars or any planet will be maintaining the environment for life to thrive. Like Earth based high mountain peaks atmospheric pressure, moisture, heat, and radiation are all factors that limit plant and animal growth. CO2 conversion is only a small factor but important in sustained space travel. Scientific research on space travel is slow because getting it wrong is easy and consequences most likely deadly.

      So I ask, How do you convert CO2 to O2 with limited resources with re-usable bi-products? In space bi-products are the issue. You need to look at not just the formula but the system as a whole and how easy it is to scale.

    3. Re:Don't plants already to this? by drinkypoo · · Score: 1

      Plants need water, generally speaking. And, generally speaking, there isn't much of that on Mars since, as you point out, it's largely desert-like.

      It doesn't matter if there isn't much on mars if you site your base near a lot of it. And we believe that we have located concentrated water, so that's a feasible goal.

      --
      "You're right," Fisheye says. "I should have set it on 'whip' or 'chop.'"
    4. Re:Don't plants already to this? by Anonymous Coward · · Score: 0

      sugar is pretty much water + carbon (carbohydrate), so you're going to need that water.

  12. I'm rich !!! Cuba is rich !!! by burni2 · · Score: 1

    Sugar cane is the answer, or sugar beets, or wheat and corn and a bit of crushing and salavia.

  13. Re:Grow sugar cane? by RenderSeven · · Score: 4, Insightful

    Eating other animals has been common for 2 billion years or so. Seems pretty damned natural to me.

  14. Re:Forget Mars by Anonymous Coward · · Score: 1

    There's cost implications too. On earth it might not be the cheapest way to farm sugar, even if it is more efficient. Sugar beet, cane etc grow just fine for example. On Mars it would be essential to do it as a chemical process as the crops won't grow there.

  15. Well this would get you most of the way there by NotSoHeavyD3 · · Score: 3

    Since making alcohol is pretty much get a bunch of sugar, dissolve it in water, and then get yeast to convert it for you.

    --
    Did you know 80 to 90% of the moderators on slashdot wouldn't recognize a troll even if one dragged them under a bridge.
  16. Re:better to spend on not having cane sugar by Anonymous Coward · · Score: 1

    Brown sugar IS cane sugar you idiot.

  17. Totally confused by Anonymous Coward · · Score: 1

    atmosphere of Mars consists predominantly of CO2 (95%)

    If Mars' atmosphere is 95% CO2, and according to the scientific consensus CO2 is so powerful a molecule that 1 out of 2500 can raise the Earth's temperature by anywhere from 1 to 5 degrees C, how the hell is it that Mars is not roasting?

    I am so lost in all this now, one minute I think I understand then someone comes and screws up the information I had.

    1. Re: Totally confused by Anonymous Coward · · Score: 2, Informative

      (1) Mars atmosphere is thinner, meaning it cannot retain as much heat as Earth
      (2) Mars is farther away from the Sun

    2. Re: Totally confused by jd · · Score: 1

      With respect to 2, if you double the distance from the source then you quarter the energy you get from it.

      So if Mars is twice as far from the sun, it gets a quarter the solar radiation.

      --
      It's a small world and it smells funny; I'd buy another if it wasn't for the money; Take back what I paid (SoM)
    3. Re: Totally confused by Anonymous Coward · · Score: 1

      But I thought CO2 was like this heavy blanket, the more there is the thicker the atmosphere becomes.

      And what does the sun have to do with CO2 caused global warming? Haven't we been told for years now that sun isn't the cause?

      Even if it only gets 1/4 the radiation, because the CO2 is 95% of the Martian atmosphere whereas CO2 is only 0.04% of Earth's atmosphere, shouldn't it be having a much greater affect?

    4. Re: Totally confused by Anonymous Coward · · Score: 0

      Mars atmosphere is thinner, meaning it cannot retain as much heat as Earth

      This is true, according to Wikipedia the Martian atmospheric mass is 25 teratonnes and Earth's atmospheric mass is 5148 teratonnes.

      But, it also says that Mar's atmosphere is 96% CO2 and Earth's is only 0.04% CO2. Doing the math, that means

      Mars: 25 * .96 = 24 teratonnes of CO2
      Earth: 5148 * .0004 = 2.05 teratonnes of CO2

      So Mars physically has 12 times the amount of CO2 in her atmosphere than Earth does.

    5. Re:Totally confused by crunchygranola · · Score: 3, Informative

      You need to actually put in some effort to learn the subject, instead of just picking random factoids out of the aether (assuming that this is a serious post, and not just being disingenuous).

      Mars gets only 40% of the solar energy that Earth gets, so to get Mars to the same temperature as Earth far more heat trapping is needed. Carbon dioxide on Earth traps heat as part of system that is 160 time thicker than Mars, including a lot of water vapor, which provides most of the trapping effect. Carbon dioxide is not warming Earth all by its lonesome. There is more water vapor in Earth's atmosphere, on average, than Mars has atmosphere, period. The atmosphere of Mars is bone dry.

      --
      Second class citizen of the New Gilded Age
    6. Re: Totally confused by jd · · Score: 2

      I'll assume these are serious questions.

      No, you have not been told the sun isn't the cause. What you have been told is that variation in solar output is not the cause.

      CO2 is like a blanket, but blankets do nothing without a source of heat. You need a source of heat before CO2 can trap it. That source is the sun.

      Mars has a very thin atmosphere. As a result, it's not going to trap anything. It's the density that matters, not the percentage. Think of silver foil. It's reflective. If you cover the floor of a room and shine light on it, it'll reflect a lot of that light even if the floor is only 0.04% of the room. That's Earth's global warming.

      Earth has a very thick atmosphere, almost syrupy. A typical cloud weighs 1.1 million pounds, so to be buoyant, it must displace 1.1 million pounds of air. That's a lot. And yet a cloud is small.

      Mars' atmosphere is whispy thin. That same cloud on Mars would crash into the ground and form a crater before being blasted into space by solar winds.

      To go back to the room analogy, it's like instead of having a proper room, all you've got is a handful of threads. Yes, they're 95% wrapped in silver foil but you've still only got a handful. It's not going to reflect much of anything.

      --
      It's a small world and it smells funny; I'd buy another if it wasn't for the money; Take back what I paid (SoM)
  18. Global warming solved! by cascadingstylesheet · · Score: 0

    Global warming solved!

    Not only do we get rid of the extra CO2, we finally get the Big Rock Candy Mountain that I've always dreamed about!

  19. Re:Forget Mars by RandomFactor · · Score: 1

    Could be dependent on factors different on Mars like ubiquitous perchlorates just lying around in bulk.

    --
    --- Mercutio was right.
  20. Fight climate change with sugar? by Anonymous Coward · · Score: 0

    Great, instead of dying intoxicated, we'll die of diabetes.

  21. Re:Forget Mars by cascadingstylesheet · · Score: 0

    If a chemical process works on Mars it will almost certainly work here. It's also possible that this is Mars-focused to avoid the inevitable political wrangling if it was directly aimed at climate change.

    Dang straight. We need to teach CO2 not to greenhouse, not sequester it!

  22. good one by Anonymous Coward · · Score: 0

    And which boiler room and basket of cryptocurrencies will they use to pay for it?
    What good will it do them?

  23. basically yes by DrYak · · Score: 2

    basically yes, that's the plan.

    this NASA project is about "sciencing the shit out of" all the tiny details that go behind the general word "tree":

    - how to deal growinv something in a soil that is mostly perchlorate (not exactly a rich soil)?
    - how to deal with an atmospheric pressure that is a tiny fraction of earth's?
    - how to deal with sun's output which is a lot less (in terms of useful light) but higher (in term of radiations)
    - and which exact plant are you going to use as "tree" ? (probably some cyanobacteriae)

    it's the detailled answers to these questions that is going to cost this budget

    --
    "Sufficiently advanced satire is indistinguishable from reality." - [Tips: 1DrYakQDKCQ6y52z6QbnkxHXAocMZJE61o ]
    1. Re:basically yes by lcam · · Score: 2

      Geo-engineering Mars to support earth type life requires that long term priorities to be defined clearly.

      It seems to me that glucose production from Martian raw materials is critical for the sustainability of human life; that a long term priority is already presumed by NASA in this exercise. We are not geo-engineering by altering the environment but rather by containing an environment.

      That means the primary engineering a technological solution which leads into the questions you ask.

      - how to deal growinv something in a soil that is mostly perchlorate (not exactly a rich soil)?

      Soil minerals obviously need to be substituted with "plant food". Once the initial generation of "tree" has grown, a portion of it is permitted to decompose to fulfill the nutrition gap requisite for the sustainability of the next generation.

      - how to deal with an atmospheric pressure that is a tiny fraction of earth's?

      Eucalyptus trees where bred near the Mojave desert so as to derive a strain that would hold up to the desert conditions.

      A similar process could be used to derive a strain of algea that thrives in low atmospheric pressure.

      - how to deal with sun's output which is a lot less (in terms of useful light) but higher (in term of radiations)

      A similar process to above, furthermore the light will need to be filtered as the greenhouse environment will necessarily involve sunlight passing through a transparent material of some sort.

      Further up-concentration / transformation of solar energy can be done with mirrors or other technological enhancements.

      - and which exact plant are you going to use as "tree" ? (probably some cyanobacteriae)

      The exact plant chosen has to do with efficient use of energy by the plant... A cheap solar cell is 10 times more efficient at gathering energy than the most efficient plant. The biggest external factor is the wavelength of light energy available; light outside the nominal 400 - 700 nm wavelength plants use is unavailable to power photosynthesis.

      A technological enhancement may be to employ solar panels and lighting systems wherein the energy density introduced to the plant is maximized by way of utilizing components designed to enhance the suns energy spectrum.

      It is noteworth to point out that a similar efficiency problem exists with regards to the amount of CO2 dissolved in the water and in that CO2 being in close proximity to the photosynthetic bio-agent. Greater pressures enhance the solubility of CO2 in the watery solution so perhaps breeding a bio-agent for low pressure environment is the wrong approach initially. Especially where technological enhancements are being applied.

      However if sustainability of human life is not the primary objective, geo-engineering boils down to how can we change the energy dynamics on a planetary scale so as to advance the dynamic in the desired "direction".

      For example, what would be the result of adding 0.0005% of sulfure dioxide, or hydrogen sulfide to the atmosphere? Is there a better chemical agent to introduce?

      p>Another example, what can be done to enhance the magnetic field of the planet so that the atmosphere doesn't get stripped away during CME events?

  24. Re:Grow sugar cane? by Anonymous Coward · · Score: 0

    Hey, why don't you go tell the lions, and if you make it crocodiles also, that they need to stop eating animals

  25. Why not on earth? by DaMattster · · Score: 3, Insightful

    Mars colonization is many, many years away. Since we humans here on earth are belching out CO2 like it's going out of style, why don't we start doing some of that here? Let's make earth more inhabitable.

    1. Re:Why not on earth? by cascadingstylesheet · · Score: 1, Funny

      Mars colonization is many, many years away. Since we humans here on earth are belching out CO2 like it's going out of style, why don't we start doing some of that here? Let's make earth more inhabitable.

      No! We must not have tech solutions. Instead, we must teach CO2 not to greenhouse!

    2. Re:Why not on earth? by Anonymous Coward · · Score: 0

      But, Earth is habitable. Step outside of the ivory tower and see. CO2 is rising, and something is happening. Grass is greener, plants are growing, and things are eating the plants. But, the Earth is in a constant change. And it's not that invisible CO2 that is the problem. IR is invisible to co2. It's visable to water vapor. And the methane groups. Otherwise Mars would be as warm at it's surface as Earth is. But it's as cool as our coldest areas in it's hottest areas. This is the eighth year of a cooling trend, this type of trend killed millions in the last occurance, will we burn the witches again?

    3. Re: Why not on earth? by jd · · Score: 3, Informative

      I'll agree it's many years away. If you choose an optimal path, it will take 15 years to build a complete self-sustaining environment. It won't be cheap, but if you spend what it takes, that's what it will take.

      That's arguably many.

      Fixing the Earth requires fossil fuels to be abandoned by 2030 at the latest and around 1960s level by the end of this decade. Otherwise, even with geoengineering, it can't be done.

      It also requires that, by 2050, the global population is down to 1 billion on the surface (and no more than an additional 3 billion subsurface). Again, if you can't do that, it doesn't matter what you engineer.

      I don't think these constraints will be met.

      --
      It's a small world and it smells funny; I'd buy another if it wasn't for the money; Take back what I paid (SoM)
    4. Re: Why not on earth? by avandesande · · Score: 1

      Even in a worst case scenario Earth will always be more easily habital than Mars.

      --
      love is just extroverted narcissism
    5. Re: Why not on earth? by Anonymous Coward · · Score: 0

      Load of horse manure. There's no such thing as AGW.

      Why?

      Because water vapor outguns CO2 10,000:1. Water vapor has 100x the concentration and 100x the heat capacity. CO2 doesn't f'ing matter one bit to climate. Also look up Feynman's take on the topic.

  26. The Martian by stud9920 · · Score: 1

    That was one of my main interrogations with The Martian: would growing potatoes be the best way to avoid starvation on Mars, or is there a way to bypass the potato phase?

    1. Re: The Martian by jd · · Score: 1

      On Mars, you'd build a Biosphere II in a cave system and have whatever you like grow there. Seed it with all kinds of plants and animals. With aroubd ten thousand square miles to play with, you've room.

      No potato phase unless you count fish and chips.

      --
      It's a small world and it smells funny; I'd buy another if it wasn't for the money; Take back what I paid (SoM)
    2. Re: The Martian by crunchygranola · · Score: 1

      You are going to need to use sunlight to grow food. Some supplemental lighting might be needed (like keeping plants from dying during the dust storms) but photosynthesis is way too inefficient to use artificial lighting to produce food for humans.

      --
      Second class citizen of the New Gilded Age
    3. Re: The Martian by jd · · Score: 1

      Humans need vitamin D. Full spectrum lighting isn't too bad and one quarter sunlight makes outside useless. That means your chief obstacle is energy. You'd need to build a fission or fusion generator. Fission we know how to do, fusion will require a lot of money thrown at it over a decade before we know if it's even doable. Either would give you the energy needed. You need the extra heat generated anyway as Mars is cold.

      --
      It's a small world and it smells funny; I'd buy another if it wasn't for the money; Take back what I paid (SoM)
  27. Oh, I see by FilmedInNoir · · Score: 1

    " The challenge is open to citizens and permanent residents of the United States; foreign nationals can compete if they're part of a U.S.-based team."
    Well then, I'll just go burn the blueprints to my SugaFyer9000.
    I not sharing my retirement fund with some flag waving intern.

    --
    Sig. Sig. Sputnik
  28. GUR IS NOT JAGGERY by Anonymous Coward · · Score: 0

    This article from the Economic Times of India explains the difference.
    https://economictimes.indiatimes.com/definition/gur
    I love this explanation because it is reminiscent of so much that is India.

  29. Not sure I trust them by jd · · Score: 2

    They abandoned their CFD bugfix challenge because too many applied. That doesn't give me confidence in their crowdsourcing ability.

    --
    It's a small world and it smells funny; I'd buy another if it wasn't for the money; Take back what I paid (SoM)
  30. Re:Grow sugar cane? by thegarbz · · Score: 1

    I do also question why the GP thinks animals produce milk as well.

  31. Oh wow... by Anonymous Coward · · Score: 0

    Turn something the US has far too much of, but doesn't git two hoots about into something they're all addicted to, but could quite honestly do without?

    Still, turning CO2 into anything other than CO2 is a useful endeavour. Shame you don't let foreigners in to the competition, after all you're exporting all your CO2 to us without our consent - maybe someone's already turning your CO2 into a 'beautiful wall'?

  32. Easy by Roger+W+Moore · · Score: 2

    To turn CO2 into beer. And pay $1 Billion.

    Easy, plant some barley and hops, these will grow absorbing CO2 and then use these to make beer. Can I have my $1 billion please?

  33. The ideal solution. by jd · · Score: 1

    Obviously plants and blue-green algae turn co2 into sugar. Just not very quickly.

    We can extract, modify and synthesize DNA, so we can modify cyanobacteria to be faster, more efficient, rapidly multiplying sugar producers.

    Then it's just a matter of not reading A For Andromeda.

    --
    It's a small world and it smells funny; I'd buy another if it wasn't for the money; Take back what I paid (SoM)
  34. Sugar cane by Anonymous Coward · · Score: 0

    Where is my million dollars?

    1. Re:Sugar cane by hcs_$reboot · · Score: 1

      Already given 30 posts above yours.

      --
      Slashdot, fix the reply notifications... You won't get away with it...
  35. Behold by Anonymous Coward · · Score: 1

    I offer 1 trillion USD for a method to cheaply turn Co2 into diamonds, or gold

    1. Re:Behold by krray · · Score: 1

      I can do it REAL cheap. Just takes a LOT of time...
      Please send the check to...

  36. Beets by rossdee · · Score: 1

    Up here in the midwest, beets grow well.

    Of course NASA might ne able to grow sugar cane om its properies in Forida

  37. Sweet ... by CaptainDork · · Score: 1

    ... dreams are made of these CO2.

    --
    It little behooves the best of us to comment on the rest of us.
    1. Re:Sweet ... by cascadingstylesheet · · Score: 1

      ... dreams are made of these CO2.

      Who has a mind to disagree?

    2. Re:Sweet ... by CaptainDork · · Score: 1

      We get water from the seven seas.

      --
      It little behooves the best of us to comment on the rest of us.
    3. Re:Sweet ... by Anonymous Coward · · Score: 0

      Everybody's bitching bout something.

    4. Re:Sweet ... by CaptainDork · · Score: 1

      Some of them want to use you ...

      --
      It little behooves the best of us to comment on the rest of us.
  38. Re:Grow sugar cane? by Anonymous Coward · · Score: 0

    Because it's completely natural to slaughter animals

    Are sharks natural? Alligators? Dinosaurs? Bears? Whales? Pretty much eating other things is about as natural as you get, and has been going on for a hell of a long time. How can you claim that eating other things isn't natural when the rest of the animal kingdom does it?

    Like it or not, we are evolved to be omnivores, and that sure as hell included eating other animals .. that's what it means to be an omnivore. Humans are just smarter animals, and don't try to pretend otherwise.

    and drink milk from cows' udders, right?

    Maybe not from an evolutionary perspective, but humans have been really good at finding food sources. But people have been domesticating cows for literally thousands of years .. the modern cow would not exist if it hadn't been kept around and taken care of by us.

    When people reach Mars, they won't have the luxury of planting sugar cane, and their waste CO2 is going to have to be turned into something or filtered out of the air, because they won't be able to carry everything they'll need.

    This is just saying that if we are going to have an inevitable waste product of simply breathing, we're going to need to learn to use it. When you're in a sealed environment with no new inputs, you need to work with what you have.

  39. Coca-Cola is not worth $1million by Anonymous Coward · · Score: 0

    Coca-Cola is water + sugar + co2 + another additives.

  40. Re:Forget Mars by CaptainDork · · Score: 1

    Shit.

    That does make sense.

    It's kind like the parallel argument, "To prevent more handgun violence, we need more handguns," when in fact it's, "The gun industry wants to broaden its consumer base."

    Well done.

    --
    It little behooves the best of us to comment on the rest of us.
  41. Re:Grow sugar cane? by CaptainDork · · Score: 1

    Yes, meat and milk and any other goddam source that supports survival.

    Crap, humans even eat snails **shudder**.

    --
    It little behooves the best of us to comment on the rest of us.
  42. Think of the Children by Anonymous Coward · · Score: 0

    I thought sugars were bad. No pop in schools. No candy bars in the vending machine. No 32oz Coke in NYC. Lo-carb diets galore.

    Isn't this creating an obesity crisis for our Mars Colonists?

  43. This would be huge by Anonymous Coward · · Score: 0

    A lot of the comments here require water as does the current method of synthetic photosynthesis begin developed, and since water isn't compressible it makes it very difficult to transport in quantity to mars (maybe as base elements but still not efficient to use your water supply to produce power on a planet with no water supply).

    You could first convert the CO2 to CO pulse dielectric barrier discharge plasma thereby producing oxygen as a byproduct and then tungsten to at as the catalyst to cause the C0 to combine with hydrogen, though to ensure that you don't end up with formic acid you would need mix heavy to hydrogen side.

    You could also go the organic route and use a photosynthetic bacteria that produces glucose as a byproduct and uses very little water in the process, but again you are dependent on water.

    David S

  44. Forget Mars, we need this for climate change by foxalopex · · Score: 1

    This would be a impotent step in solving our climate change issues from excess CO2. If we were able to convert the excess CO2 in our air to sugar it would help to remove it and provide a fuel that our civilization could use.

  45. reductionism by Anonymous Coward · · Score: 0

    If we put the money wasted on space exploration for the purpose of settling other worlds towards reducing our own population, we'd be better off as a species.

  46. Non US people cannot invent.. by Anonymous Coward · · Score: 0

    so nasa decides contest only open to Trump citizens

  47. This looks like a job for biotechnology by Anonymous Coward · · Score: 0

    I'd be surprised if a pure chemistry solution to this problem presents itself.

    I'd bet good money that they end up doing this with a genetically-modified organism that can be easily cultured without having to set up a whole hydroponic farm or something. Algae seems like a good bet for the chassis; it's already producing sugars from CO2, and algae culture is a reasonably cheap and simple thing to do in a small space. I'd further guess that such a rig would need to supplement natural sunlight with some artificial lighting, and someone would have to develop an efficient process to detoxify Martian soil (or a strain of algae that could survive it), but those seem like comparatively easy problems to solve.

  48. Re:Grow sugar cane? by Anonymous Coward · · Score: 0

    Crap, humans even eat snails **shudder**.

    Ever tried them? They're actually tasty if they're prepared properly ... and that is true of many things people might go "eww" about.

    As a former vegetarian, I've decided I'm going to be pretty open and fearless in terms of tasting new things. If you are going to eat meat, you should know what it is, where it comes from, and try to use all of it. Not all offal tastes awful, some of it tastes wonderful.

    Throughout history humanity seldom has had the luxury of simply discarding the icky bits, and people have learned how to make them taste good. And some of the bits which people turn up their noses at can be turned into some damned awesome food in the hands of someone who knows how to work with it.

    Hell, lobster used to be a poor man's food because nobody wanted it and it was considered garbage. Now look at the price of it. Same is true for brisket, it's tough until you know how to cook it. Oxtail, pigsfeet ... hell, even natural sausage casings are pig intestines.

    Much of the beloved food around the world comes from using everything available to you, and using all of it, because people had no choice.

    You think your hotdogs are the choice meats? I got some bad news for you.

  49. Converting CO2 into Sugar by Anonymous Coward · · Score: 0

    Oh, great. We'll be trading global warming for more obesity.

  50. great, the next future "woke" whinefest by Anonymous Coward · · Score: 0

    so soon we'll hear all about how the Evil Government is Subsidizing with Tax Dollars this CO2 to sugar because Big Sugar is in cahoots with the Medical Industrial Complex to give Minorities Diabetes!

    But only when Those Other Guys are in power!

    (soon to be in play in a game of 'Iluminati' near you!)

  51. Just plant some sugar cane by Anonymous Coward · · Score: 0

    Plants do this naturally, why come up with a synthetic way to do it.

  52. NASA? by Anonymous Coward · · Score: 0

    Why is NASA in the CO_2 business? Does it plan to run spaceships on sugar? Oh wait, aeronautics. Maybe it will run airplanes on sugar?

  53. Do it Dry! by Anonymous Coward · · Score: 0

    The problem with the process mentioned by most people whether it be an organic method like a plant of photosynthesizing bacteria is that some water, even a small mount is needed. Even the most recent advances in Chicago that are creating a synthetic version of photosynthesis are using water. Since water isn't abundant on Mars or compressible it wouldn't be smart to use the water supply as an energy source (you could bring compressed hydrogen and oxygen stores specifically for energy production).

    An alternative method would be to use a pulse dielectric barrier discharge plasma with N2 as the carrier gas to peel an oxygen off to create carbon monoxide (and add oxygen to your supplies). Then using tungsten as a catalyst and a heavy hydrogen mix (to ensure you don't end up with formic acid) you could use the Carbon Monoxide to create glucose. You would need a supply of N2 and Hydrogen both of which would probably be in the supplies list already.

    The excess nitrogen and water would be useful to the biosphere of the colony to aid in plant growth.

    Just a thought

    1. Re:Do it Dry! by Anonymous Coward · · Score: 0

      You could go an alternate route and just mix hydrogen with the carbon dioxide at a temp around 400 Deg C to produce methane and water. Use the methane as fuel and add the water to your supply. I wonder how the travelers would feel with 20,000 lbs of compressed liquid hydrogen riding in the cargo bay, and a planet that stinks of methane?

  54. How about if we made gasoline with it too! by Anonymous Coward · · Score: 0

    Make the whole fossil fuel issue a closed loop
    (at least until the existing autos can be replaced without bankrupting us all.)

  55. Alchemy by TimMD909 · · Score: 1

    I can turn caffeine into code, but CO2 to Mt Dew ingredients? That's black magic...

  56. Hello McFly....think McFly think by Anonymous Coward · · Score: 0

    Grow any plant that fruits...the end. I thought NASA was smart.

  57. The reason is important by Anonymous Coward · · Score: 0

    The atmosphere on Mars has 23 times as much CO2 per cubic meter as Earth's atmosphere.

  58. Re:Grow sugar cane? by thegarbz · · Score: 1

    Before shuddering I really suggest you give it a try. A lovely garlic and butter escagot is a beautiful starter for any meal.

  59. Can't be done by Solandri · · Score: 1

    come up with an efficient method to convert carbon dioxide into glucose,

    The Gibbs free energy defines the energy state of a molecule. Think of it as the potential eneregy of a molecule on a ladder. The higher the Gibbs free energy of a molecule, the more potential energy it has, so the more energy you can extract from it in chemical reactions. On the other hand, if it's low, then you actually have to put energy into it to change its chemical formulation.

    • The Gibbs free energy of CO2 is -394.39 KJ/mole. This is very low on the ladder - that's why CO2 is frequently an end product in chemical reactions.
    • For hydrogen gas and oxygen gas, it's zero. The most common elemental form is used to define the zero point.
    • For glucose (C6H12O6) it's -910.56 KJ/mole. This is actually pretty high, the raw number is just low because it contains a lot of individual atoms.

    To form one glucose requires:

    • 6 CO2 + 6 H2 => 1 C6H12O6 + 3 O2

    The H2 and O2 drop out. So you end up with 6*(-394.39 KJ/mol) => -910.56 KJ/mol, which results in a deficit of 1455.78 KJ/mole. That is, the complete chemical reaction is:

    • 6 moles CO2 + 6 moles H2 + 1455.78 KJ => 1 mole C6H12O6 + 3 moles O2

    For every mole of glucose you make from CO2, you must add at least 1455.78 KJ of energy to make the reaction happen. A mole of glucose is about 180 grams, so this works out to a little over 8 MJ per kg (this is less than its its energy density of 15.5 MJ/kg because we assumed the hydrogen gas was free - on Earth you'd have to use energy to break apart water to create hydrogen).

    That's a huge amount of energy. The 85 kWh battery pack in most Tesla S cars is only 306 MJ. So to create 1 kg of glucose from CO2 requires at least as much energy as moving 2500 kg car 10 km. The efficiency of your process is probably going to be 50% at best, so realistically you can double the energy needed. And if you don't have H2 available and need to create it, then it's going to take even more energy (since H2 sits very high on the ladder, it likes to react and form other chemical compounds, meaning you have to put energy in to release the H2).

    The only real hope is using some other molecule with a high Gibbs free energy as your hydrogen source. That molecule then gives up some of its Gibbs free energy while releasing hydrogen (what's done in methanol-powered fuel cells). Unfortunately, the most common high-energy hydrogen source is hydrocarbons - petroleum, alcohol, etc. They have a similar ratio of carbon and hydrogen as glucose, so trying to extract hydrogen from them will result in your process using no CO2 - it'll get the requisite carbon from the hydrocarbon instead.

    The lone exception is methane - CH4. It contains 4x as much hydrogen as carbon, vs 2x for most hydrocarbons. So it could conceivably be used to create glucose while absorbing CO2. In fact its Gibbs free energy is -50.8 KJ/mol. Resulting in a possible chemical reaction of:

    • 3 moles CO2 + 3 moles CH4 + 425.1 KJ/mol => 1 mole C6H12O6

    It's still a huge amount of energy, but less (making 1 kg of glucose would require only as much energy as pushing your 2500 kg car 3 km). Unfortunately, I suspect the point of this project is the potential to terraform Mars by converting its atmospheric CO2 into something else, while releasing oxygen in the process. Our methane equation uses half the CO2 as the previous equation, so in terms of scrubbing CO2 it's only 67% more effective per MJ. And it doesn't release any O2 so would be useless for terraforming.

    1. Re:Can't be done by RenderSeven · · Score: 1

      Most informative thing Ive read on /. in a long time. Thank you Sir.

  60. Op is on topic by Anonymous Coward · · Score: 0

    The post was in response to a gratuitous trump joke that had no business in a serious discussion. Whoever missed it down is a child and should be banned.

  61. Re:Grow sugar cane? by CaptainDork · · Score: 1

    If you are going to eat meat, you should know ...

    how to chew.

    --
    It little behooves the best of us to comment on the rest of us.
  62. Re:Grow sugar cane? by CaptainDork · · Score: 1

    I saw it on a menu once ... ONCE!

    The restaurant was not full service.

    No barf bags.

    --
    It little behooves the best of us to comment on the rest of us.
  63. Re:Grow sugar cane? by thegarbz · · Score: 1

    Why would you barf? It has a flavour mixed between seafood and beef with a strong taste of garlic, and a texture tougher than fish. I've put a lot of things in my mouth, some of them truly horrid (deep fried bat nearly made me barf) and this is IMO one of the more plainer westernish foods out there in terms of flavour and texture.

    You should take a trip to France, you'll see it on the menu every time you read the menu (and TBH it's a shitload better than a lot of French food).

  64. Re:Grow sugar cane? by CaptainDork · · Score: 1

    I would barf for the same reason I get air/sea sick.

    Not exactly, but maybe.

    Who knows?

    Certainly not me because I ain't gonna try that shit.

    Let Mikey try it. He'll eat anything.

    --
    It little behooves the best of us to comment on the rest of us.
  65. Re:Grow sugar cane? by Anonymous Coward · · Score: 0

    Before shuddering I really suggest you give it a try. A lovely garlic and butter escagot is a beautiful starter for any meal.

    Said the Klingon.

  66. Overstimulated Glucose Addicts by Anonymous Coward · · Score: 0

    As if we don't have enough overstimulated glucose addicts already.

    -- This SIG is not SAUER

  67. well sorry by ComputersKai · · Score: 1

    Sweet!

  68. Balanced reaction... by Grog6 · · Score: 1

    That's the excess O2, left over after the other ones are used up.

    That's a technical way to say this will liberate oxygen.

    --
    Truth isn't Truth - Guliani
  69. Have you worked much with Perchlorates? by Grog6 · · Score: 1

    :)

    They don't need Oxygen to burn, and work really well as rocket fuel, mixed with aluminum and epoxy.

    Which almost everything we send up there is made of...

    --
    Truth isn't Truth - Guliani
  70. Re:Grow sugar cane? by Anonymous Coward · · Score: 0

    If you put that bullshit on the table in front of me, I'll bitch slap the fuck outta your faggotty face with the plate they came on, frenchie.

  71. offering by Anonymous Coward · · Score: 0

    Double the final consonant of the verb stem only when the final syllable is short and stressed. (Exception: verbs ending in -l in British English) src </peeve>

    1. Re:offering by Anonymous Coward · · Score: 0

      I'm short and stressed