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New generator is simple -- just park it in your company's parking lot, and start collecting trash to feed it.

Small startup IST's generator is hungry -- for your trash.  While some companies have turned to solar or wind power to cut their power budgets and green their campus, IST's solution is twofold: cut your waste disposal costs, while also producing green power and heat.

The generator, called the Green Energy Machine (GEM), takes up three parking spaces and can easily be placed in a lot.  The generator does require a slightly special diet.  Metal and glass have no energy content and thus IST encourages people not to put them in the generator, but rather recycle them.  However, food, cardboard, plastics, agricultural wastes, all can go in.

While a bit finicky, the generator is definitely green.  It uses gasification, which releases less carbon emissions and other airborne emissions than combustion.  Gasification is a popular target among a number of alternative energy startups who hope to use it to create power from biomass, what IST has ultimately achieved with the GEM.

The generator first shreds the trash and turns it into pellets.  It then feeds the pellets to a gasifier which produces synthetic gas, primarily composed of hydrogen and carbon monoxide.  The syn gas is then burned in a natural-gas microturbine, which IST says is the most efficient.

Stu Haber, president and chief executive of Waltham, Mass.-based IST, described to CNET News, "Normally, when we tell people what we're doing, they say, 'You can do that? I had no idea that was possible."

The machine can convert 95 percent of up to three tons of waste daily into green energy.  The remaining 5 percent is converted to ash, which can be safely disposed of.  IST estimates that some business's waste collection bills are as high as $200,000 a year, so a GEM may show a good return of interest, purely from the cuts in collection fees.  With three tons of trash daily, the generator can produce a good deal of heat and electricity for a 200,000 square-foot building holding about 500 people, the company's target-size for the units' locations.

IST is aiming for a modest start, hoping to sell 5 to 10 units this year.  Mr. Haber states, "The first GEM will be the hardest one to sell."

While companies largely rely on state grants or tax incentives to provide the financial motivation for new installations, Mr. Haber believes the GEM is viable with no government support.  Yielding 120 kW and twice that amount in heat a day, from 3 tons of trash, the generator can save a lot of money.

The GEM costs $850,000, but that investment will be returned in 3 to 4 years, the company believes.  However, to soften the cost of adopting the solution, it is providing leasing options for those interested.  And while, IST says that it really doesn't need it to be viable, it notes that there’s a 10 percent federal tax credit for biomass alternative energy, which applies.  All the factors add up to a promising outlook for businesses considering the GEM, says Mr. Haber.  He states, "Everybody loves the fact that they're helping the environment, but because we're talking to businesspeople, I have to assume that they're interested because of the very quick payback."

IST is not without competitors in the burgeoning field, though.  The U.S. Army is testing trash-fueled generators in Iraq, while being slightly disappointed of the results of its own design.  Ze-Gen, based in Boston, Mass., is looking to implement a similar gasification process to IST, but to do it through a collection scheme and centralized plant.  The key tradeoff here would be the increases in efficiency of a larger generator, versus the losses in power transmission. 

Other companies like Oregon's InEnTech are looking to plasmification to produce the most synthetic gas possible.  And still others like Coskata are looking to feed the output to microbes to create cellulosic ethanol.  However, in terms of a purely biomass solution IST appears to be the first hitting the general market.

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RE: One way to reduce corporate waste
By FITCamaro on 1/19/2009 11:18:53 AM , Rating: 5
I think it would make sense for a business to use these. It would offset their power costs at no additional cost for fuel given the fact that employees throw out tons of paper and what not in a single day. And if there's one thing you can always count on, its trash.

Really we should start setting these up near land fills. Think of how much trash we could convert into energy while reducing the size of our landfills. All those used baby diapers are a fuel goldmine. :)

By Bateluer on 1/19/2009 11:36:19 AM , Rating: 3
That actually sounds like a good idea, placing these GEMs near landfills.

I don't know how practical playing a device like this in a downtown parking lot would be. How noisy is it? Parking spaces are at a premium in many down town areas, and most is in parking garages. Whats the exhaust like? I'm assuming that putting it in the basement of a parking garage would create a toxic soup of exhaust gases in that basement?

RE: One way to reduce corporate waste
By Motoman on 1/19/2009 11:44:14 AM , Rating: 3
I like this too, although I'm waffling a bit on the use of paper...I think it may be better to recycle paper and paper products.

But baby diapers and food waste...go for it.

RE: One way to reduce corporate waste
By Murloc on 1/20/2009 6:39:32 AM , Rating: 2
in my opinion paper and PET should be recycled, but you can throw the rest on this machine.
If toxic gas is a problem then it's still useful for green waste, like bushes, grass etc.

By masher2 on 1/20/2009 8:24:44 AM , Rating: 2
> "in my opinion paper and PET should be recycled"

Burning paper, then spreading the ashes on the ground to fertilize new tree growth is probably the 'greenest' method we have of recycling. The amount of chemicals used and pollution generated to directly recycle used paper is, by some accounts, substantially higher than that from making virgin paper.

RE: One way to reduce corporate waste
By rcr on 1/19/2009 12:08:54 PM , Rating: 2
I don't think that a place near the landfill sites would be good, because the bigger part that is produced is heat. So there would be big losses to transport it.

RE: One way to reduce corporate waste
By ebakke on 1/19/2009 1:11:41 PM , Rating: 2
Heat some water, and run a steam turbine. Even if the heat is wasted completely, you're still getting 120kW / 3 tons of trash that would otherwise be sitting in a landfill.

RE: One way to reduce corporate waste
By Hare on 1/19/2009 4:31:54 PM , Rating: 2
I don't know how common it is but at least here landfills gather gas (mostly GH4, methane) from the trashpiles using gas "wells/pumps". A small landfill can extract about 30 000 MWh. That's quite a lot.

RE: One way to reduce corporate waste
By Ringold on 1/19/2009 3:41:05 PM , Rating: 2
Really we should start setting these up near land fills.

I've always thought the efficiency loss in everyone maintaining their own cute little power supplies was a little silly -- crazed mercantilism, except on a building by building basis instead of national. (But thats environmentalism for you)

So I agree. If these things really make economic sense, make some big ones, park it next to landfill, and light 'er up. Waste management companies could become small utility companies, or perhaps partner up with local ones. Let businesses specialize in the industries they're already engaged in, and let trash and energy companies continue to focus on trash and energy, and economies of scale are preserved.

I somehow have a sad suspicion however that if someone had a million bucks and a desire to buy one of these, park it next to a landfill and start producing electricity, the government and environmental red tape he'd have to go through might be slightly ridiculous, but I would hope not.

By cornelius785 on 1/19/2009 4:05:39 PM , Rating: 2
I had a similar idea of why not take trash from the land fills and make them slowly disappear over time. Then I remembered that someone will find a way to stop that from happening, probably from supposed environmental concerns.

I suppose not enough is known of how well it can handle various hazardous materials from who know what that has been thrown out over the years. There is also the bit of how well it can handle little bits of metal and glass that sneak through the screening process.

RE: One way to reduce corporate waste
By Keeir on 1/19/2009 4:06:51 PM , Rating: 2
Some of what makes this economical however is that most companies have to pay between 30-40 dollars per ton for waste removal, which can run as high as 60-100 depending on location and reliability factors. This system would save (if all 3 tons are converted daily) on the order of 36,000 dollars a year and maybe for some businesses up to 100,000 dollars a year.

Furthermore, the businesses buying the power and heat would be saving the retail costs of the electricity/heat. If you were producing such at a landfill location, I imagine it would be more wholesale prices for the power... probably 70% or less what the localized business would be saving.

RE: One way to reduce corporate waste
By bfonnes on 1/20/2009 1:12:18 AM , Rating: 2

You'd need to many of them... Better to use one of the above at a landfill

By bfonnes on 1/20/2009 1:15:14 AM , Rating: 2

Found the other one I like... Anyone ever heard of the waste-to-energy incinerator in SimCity? Come on! Don't neglect your video games now. :) Next comes nuclear fusion ;)

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