Kitchen Waste to Power Fuel Cells... Eventually

Max Romantschuk writes "Nikkei Electronics Asia reports that "The Research Institute of Innovative Technology for the Earth (RITE) and Sharp Corp have developed basic technology for making effective bio-fuel cells". Apparently these fuel cells can be powered by regular kitchen waste. The future for technology like this should be rosy, taking into account the increased pressure put on all areas of power generation for more ecologically friendly alternatives."

Comments

What will they call it?

[adamjaskie]

Mr. Fuel Cell?

Sounds familiar

[michaelggreer]

Now all they need is a Flux Capacitor

How much 'Kitchen Waste'?

[SN74S181]

I think it's important to ask how much Kitchen Waste is needed to operate one of these things. As food becomes more and more industrialized, i.e. pre-prepared there is less and less viable kitchen waste. So maybe technology like this will work well in less advanced kitchens, but those are the kitchens where it is least likely to be implemented. Also, does this mean people who are members of the 'clean plate club' don't get any energy from their fuel cell?

Re:How much 'Kitchen Waste'?

[adamjaskie]

But, pre-prepared food tastes horrid. Its overpriced, and has too many chemicals in it. Much better to just make your own food.

Re:How much 'Kitchen Waste'?

[Quill_28]

> I think it's important to ask how much Kitchen Waste is needed to operate one of these things.

Good question.

>So maybe technology like this will work well in less advanced kitchens, but those are the kitchens where it is least likely to be implemented.

I wouldn't agree. I assume that you assume that the poorer eat more food from scratch. And while I believe that was true at one time, I don't believe it is true anymore.

More and more people are coming back to well-prepared food. And realizing that it isn't that much work. For instance I ate a banana yesterday and my wife's homemade broccoli soup. Banana peel and parts of the broccoli are not eaten. Instant energy! Of course it matters what the answer to your first question was.

Re:How much 'Kitchen Waste'?

[Vellmont]

You've missed an important part of the article:

Glucose made by liquefying and refining kitchen refuse is fed to the microbes, which then produce enormous amounts of hydrogen. The hydrogen is fed into the device to generate power.

Sharp and RITE , located in Kyoto, are considering the possibility that such garbage glucose can be sold at retailers, much the way kerosene is sold today.

In other words, the idea isn't that you'll buy a special fuel cell/garbage disposal and dump your kitchen waste in it to power your laptop, the idea is that you'll buy this glucose that's produced from kitchen waste, that then powers your laptop (or whatever). I'd imagine the kitchen waste would come from large commercial sources, not joe average selling his garbage.

1.21 gigawatts!

[Neck_of_the_Woods]

Mr. Fusion in the house. Someone find me a flux capacitor!

Kitchen Waste?

[trentfoley]

If I use my kitchen waste for energy fuel, what will I put in my compost heap?

What I really want is a fuel cell powered by AOL coasters. If I can't have that, I'd like one that is powered by Euro Trash.

California reacts...

[looseBits]

In response to new developments in energy generation using home waste, the state of CA will begin taxing residents on any waste they don't throw away.

What a great concept!

[n1ywb]

I was going to say something about Mr. Fusion, but everybody else alredy has.

Seriously, this is a great advance in fuel cell technology. A lot of people think fuel cells are gods gift and don't realize that most fuel cells run on hydrocarbons (IE fossile fuel) or hydrogen. A fuel cell is probably the cleanest and most efficient way to burn hydrocarbons, but YOU'RE STILL BURNING HYDROCARBONS. You're still sucking dead dinosaurs out of the ground and pumping TONS of CO2 into the air that has been trapped under the ground for millions of years for a damn good reason. And hydrogen as a fuel has been stupid because it's costly to produce and has a super low energy density in a gasious form and is hard to store in a liquid form. The hydrogen fuel cell cars in the Tour de Sol a few years back didn't have back seats, instead they had giant carbon fiber hydrogen tanks.

So these guys found a way to produce the hydrogen IN the fuel cell, thus effectively eliminating the problems in producing, storing and transporting the hydrogen. Ingenious. I hope this is the direction society moves in, becoming more self sufficient and reducing waste. This device is a double whammy, it cuts back on household waste AND produces clean electricity.

Re:What a great concept!

[KDan]

Actually, as far as I know the energy density (per weight of material) of hydrogen is greater than that of hydrocarbons.

Check this link for more information.

Daniel

Re:What a great concept!

[n1ywb]

Liquid hydrogen does, but that is an extraordinarily difficult material to handle, considering that it is only a liquid near absolute zero. Hence it's not used in any mainstream applications that I am aware of.

Re:Great Scott!

[Spock the Baptist]

No, no! Contrary to popular opinion Mr. Fusion can not use regular garbage as fuel. It requires need a combination of cold cream and margarine to produce energy.

Ponds and Fleishman strike again!

Re:ecofriendly

[spotted_dolphin]

Yeah, except for that strain of super-bacteria you cultivated!
What's wrong with bacteria which breaks down our wasted food? I'm sure there are a lot of little kids out there who would be happy to have them around to feed their brussel sprouts to.

Requires Recycling of Kitchen Waste

[tyen]

In case anyone else is interested, this is not quite a "dump your kitchen waste into the food processor-like chute" device, a la Mr. Fusion. The article specifically states that the organic material has to be liquified and refined to extract a glucose mixture that the bugs (which are the heart of the device) eat. Thus, if we want to use kitchen waste, it has to be recycled, in much the same manner that people who compost their kitchen waste save it.

The article goes on to mention that Sharp and Kyoto University hope that "such garbage glucose can be sold at retailers, much the way kerosene is sold today." I'm specifically interested in the refining process, its required energy inputs and its resultant waste stream, but couldn't Google up anything useful because I'm not familiar with organic chemistry.

Presuming that it doesn't take more energy to refine raw organic material into the glucose stockfeed than the device emits (in which case the utility of the device is its energy storage properties), and the waste stream from the refining process is benign in quantity and in its toxicity properties, this would be a very cool way to generate/store energy. They don't say how long a matchbox-sized device could power an LCD TV, but if the power density is anywhere near pure hydrogen cell-based units, this would be way handy for laptops and other portable devices. However, I'm a little skeptical that it could eventually even partially displace fossil fuels because the sheer quantity of glucose needed is probably impractical to produce.

Re:Requires Recycling of Kitchen Waste

[Sgt York]

A good portion of food waste is (by weight) cellulose. Cellulose is simply a polymer of glucose, put together in such a way that we (and all other animals) can't break it up into its monomers. Bacteria can do this; if you have a bug that leaves the glucose alone once it is made (these engineered bugs exsist), this would be highly efficient. All it would take is homogenization (i.e., big blender) and perhaps some purification.

There are ways you could do this that would use very little energy. Imagine a biomembrane seperated tank; in the membrane are facilitated transporters for glucose. On one side is pure water, on the other is water with bugs in it. Add your homogenized crap to the side with the bugs, and the glucose will flow into the other side with no further energy input. Just change the tanks every now and then, and concentrate the side with the glucose (ultra cheap method would be to set it in the sun to evaporate the water).

Comments about Mr. Fusion aside...

[geekwench]

...(bright merciful heavens, great minds really do run along similar tracks), my concern is the length of time that this technology will take to trickle-down. Much as I'd like to see alternative energy sources get the R&D funding that they deserve, the fact remains that the world still largely runs on fossil fuels. It will take any new fuel technology a long time to be implemented; and the first people to jump on the bandwagon will be a) well-heeled 'green' types and b) geeks who can afford to shell out for something that's just so darn kewwwl. Full use and acceptance, even in the US, will take decades after the release, simply because Joe Sixpack isn't going to be willing or able to replace all of his electro-and-petrol-powered stuff.

Now, if they come up with an adaptor - count me in, baby!