Slashdot Mirror
Breakthrough in Electricity-Producing Microbe
University of Massachusetts researchers have made a breakthrough with "Geobacter," a microbe that produces electric current from mud and wastewater. A conservative estimate puts the energy output increase at eight times that of the original organism, potentially allowing applications far beyond that of extracting electricity from mud. "Now, planning can move forward to design microbial fuel cells that convert waste water and renewable biomass to electricity, treat a single home's waste while producing localized power (especially attractive in developing countries), power mobile electronics, vehicles and implanted medical devices, and drive bioremediation of contaminated environments."
...welcome our new shit-eating overlords?
- This story stinks!
- The OP is full of shit!
- I get shitty service on my phone now!
I'll show myself out.
Mod me down with all of your hatred and your journey towards the dark side will be complete!
Obama calls for "regime change" in the Republic of Elbonia.
And in East Elbonia, they are planning on dominating the world's energy market in 20 years....
www.eFax.com are spammers
Maybe it's time to evaluate 2 girls 1 cup for educational reasons...
Then again maybe not
How should we name the unit to represent Joules Per Flush? I vote for the Crapper.
As someone who helps to design and manufacture medical devices, I have no doubt that they could be made safely. That said, I doubt I'd be first in line to get one. I think even our current battery technology is sufficient for most implants. Of course, that doesn't mean we shouldn't strive to improve.
If the technology works out, I do look forward to a home septic system that produces power for me AND saves me from tearing up my yard. (Wishful thinking, yes, but cool nonetheless.)
Anyway, regardless of whether this technology becomes a commercial success, this kind of stuff could/will be very useful down the road. Great work.
The confidence of ignorance will always overcome the indecision of knowledge.
soon we'll be purchasing dirt and instead of oil, declaring war against third world countries to steal their wastes, and those environmentalists are gonna whine about the smell.
Do you D?
The Geobacter biofilm's "fortuitous" electron-transferring skill, the product of natural selection, suggested a pathway to Lovley - a way he might use selective pressure to increase its capacity to produce power. He and colleagues grew Geobacter as usual on a graphite electrode, providing acetate as food and allowing a colony to form the biologically active slime, or biofilm where electron transfer takes place across the nanowires. But for this new experiment they added a tiny, 400-millivolt "pushback" current in the electrode that forced Geobacter to press harder to get rid of its electrons.
The result of providing a more challenging environment, within five short months, Lovley notes, was evolution of a beefed-up microorganism that can press at least eight times more electric current across the electrode than the original strain. âoeI'm really happy with this outcome," the microbiologist notes. "It's exceptionally fast feedback to us and a very satisfying result." He adds, "I'm still a little amazed that they make electricity, but I'm happy to be exploring how to harness that ability. I'm sure there'll be applications developed in the future that we canâ(TM)t even envision right now."
That's halfway down in the article.
You should try reading things before you try to debunk them. The environment will be created to get the most electricity out of the little microbes, and probably sealed off and not thrown in the dirt. I imagine there may even be filters in place where the waste comes into make sure that any natural predators are weakened or killed to continue allowing the organisms to thrive.
And they have been studying this organism since 1987, and examining it for electrical production since 2002. I'm glad you're skeptical, but not glad that you're commenting on something you didn't even bother to read.
1. you get a tingly feeling every time you sit on the toilet, and its not from your feet falling asleep
2. if your septic tank overflows you're in danger of electrocuting the family dog
3. you also have to be careful where you piss, or you'll know what its like to urinate on the third rail of light rail system
intellectual property law is philosophically incoherent. it is your moral duty to ignore it or sabotage it
"FDA staff reviewers expressed concern about the number of patients who were left out of the study because they died."
..."Dennis! There's some Lovely Filth down here!"...
-=JML=-
... what's to stop the microbes from evolving/adapting BACK to the lower output when they're placed in a rich environment (fuel cell, whatever) again? Stupid researchers... they forget that mutation doesn't only occur when they want it to occur and not only in the fashion they desire.
[sarcasm]You're right. All this research is useless. We should just give up.[/sarcasm]
I feel like I say this constantly, but I just can't help myself here...
Just because you don't see a benefit doesn't mean there isn't one. Just because the technology doesn't instantly save humanity from all of its mistakes doesn't mean it's not worthwhile. Even research that never directly leads to a useful commercial application is helpful. Tons of advances have come sideways out of unrelated research. (Also, knowledge for the sake of knowledge is a choice many scientists make and there's nothing wrong with it.)
If you can't see past your own life, please get away from mine.
The confidence of ignorance will always overcome the indecision of knowledge.
I really hope you're kidding (I can't tell).
While I'm not an expert on the technology, I think I can pretty safely say that everything you said is a load of electrified crap.
The confidence of ignorance will always overcome the indecision of knowledge.
"No blood for poop!"
This joke is 100% recycled via humor-digesting bacteria.
The enemies of Democracy are
I agree.
/. existed in the 1930's, we would likely have been commenting on the crazy stories about 'Atomic' power being possible. Almost certainly, there would be comments that it's simply a fantasy that won't work. A work of fiction. 20,000 Leagues Under the Sea was just a book. Just as we'd now maybe say, "Hey, didn't they do that in the Matrix|Star Wars|Star Trek?"
/. article, we had figured out how to make an atomic bomb, and 10 years after that the USS Nautilus was built - the first nuclear powered ship. And just a couple of years later, the first public-power-generating nuclear plants came online. If you take all of that, and wrote a story published in the early 30's claiming that this would happen in the next 20-25 years, it would have been as fantastic as anything we can dream up here regarding electricity-producing algae or flying cars or living on the moon.
But then again, had
Within 10 years of that fictional
I totally agree that there's probably no way we're going to get any significant amount of our energy needs from electricity-producing microbes. Just as we probably won't from solar, wind, or waves alone. But it's just another piece of the puzzle for the future. Oil & coal aren't going away anytime soon, but it is important that we explore other options to push the frontier of what is possible. You never know, there's always a chance that this will be "the next big thing". It's worth at least reading about.
According to the paper, "KN400 (the mutant strain) also had a greater propensity to form biofilms on glass or graphite than DL1 (the wild-type), even when growing with the soluble electron acceptor, fumarate." In a fuel-cell enviroment there would be significant survival advantages to forming a biofilm. In order to run its metabolic processes, this intriguing organism needs a terminal electron acceptor in its enviroment. Instead of bringing the acceptor inside (as we do with our terminal electron acceptor, oxygen), Geobacter uses its electrically conductive pili to send its electrons outside.
An electrode would really be the ideal living enviroment for this organism- it would act as a near-infinite sink for electrons. The mutant strain KN400 seems to be better adapted to living on an electrode, so within the constraints of a fuel-cell environment, the mutant strain should outcompete against the wild strain. In the organism's native enviroment, mud in a riverbed, I'd suspect the wild-type would be more successful, since it does not prefer to anchor itself in a biofilm. In mud, the organism would be better served on the move, making use of metal oxides as it finds them, rather than being tied to one spot and risking depletion (essentially asphyxiating).
However, in the fuel cell, selection pressure will favor organisms that stick to the electrodes, maximize electron conduction, and minimize internal resistance. Even without the "pushback" current used to drive adaptation of these characteristics, my guess is that the fitness advantages they provide will cause them to be passed on to future generations.
"FDA staff reviewers expressed concern about the number of patients who were left out of the study because they died."
Some technical info and photos: http://www.geobacter.org/publications/19487117/
In the abstract for the actual journal article, they report the outputs for their mutant strain as current 7.6 amps per square meter and power 3.9 watts per square meter. Which is to say about 0.76mA per square centimeter, so not a gigantic number, but more impressive than what the parent predicts. One important factor that would make power generation using these microbes more attractive is that you could put them in a fuel cell that has a tremendous surface area to volume ratio.
Geobacter is an obligate anaerobe, so it does not require- indeed, cannot tolerate- access to the atmosphere, and it is not photosynthetic. You can buy carbon black, which makes a fine electrode, with a surface area to volume ratio of greater than 50 square meters per cubic centimeter. In the described experiment, they grew the bacterium on graphite, so carbon black should not pose an obstacle. A cubic meter of carbon black would have a surface area of about 50 square kilometers, but a mass of about 2 tons. An output of 3.9W/m^2 over 50 million square meters is 195 megawatts, which isn't shabby considering your input would be wastewater. Now, of course, that number is a wildly optimistic figure- good luck covering that much surface area with a bacterial biofilm- but it does suggest that you could produce enough power to say, make a wastewater treatment facility self-sufficient.
"FDA staff reviewers expressed concern about the number of patients who were left out of the study because they died."