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Fast-food fat: Future fuel for cars
February 8, 2007
The Oak Ridge North, Texas, plant runs its three diesel power generators entirely on biodiesel, a form of diesel made from vegetable oil or animal fat, agricultural byproducts that don't have a huge resale value. Other power plants buy biodiesel in limited quantities, but mix it with regular diesel.
By operating strictly on biodiesel, Biofuels says it can become a showcase for alternative energy. A second facility that will produce 10 megawatts of power is already on the drawing boards. Ten megawatts can provide power for about 3,000 homes.
Although biodiesel mostly gets discussed as an alternative to regular diesel for running cars, the inherent properties of biodiesel made from animal fat fit better for power plants. Animal fat biodiesel doesn't function well in cold climates and needs to be kept somewhat warm.
"They really aren't a suitable fuel unless we can come up with a suitable additive to improve these cold flow properties and do it at a low cost. Hence their major use may be for situations where we can keep the fuel supply warm, say above 60 degrees Fahrenheit, such as for heating fuels," Vernon Eidman, a professor at the University of Minnesota, wrote in response to a recent inquiry.
Biodiesel from waste products won't solve the U.S. dependency on oil. The U.S. generates about 2.7 billion pounds of waste vegetable grease a year. If all of it were harvested and converted to biodiesel, it would produce about 350 million gallons of fuel. If half of the inedible tallow and animal fat from slaughterhouses were harvested, another 500 million gallons would be produced, according to figures from Eidman.
The U.S., however, consumed an estimated 62 billion gallons of diesel last year, so these contributions would amount to about 1 percent.
Still, the amount of biodiesel produced in the U.S. will increase in the near future from all sources. Imperium Renewables, which specializes in "fresh" biodiesel, is expanding production, and agribusiness giants, such as Tyson Foods, are looking at building facilities that will take old chicken fat and turn it into fuel.
Other alternative energy experiments in Texas include a series of thermophilic digesters that convert cow manure into natural gas.
See more CNET content tagged:
biodiesel, plant, alternative energy, Texas, animal




Then why throw money into ideas which will never become feasible? The only real option forward is clean+modern nuclear energy.
Geothermal HFR is a clean safe alternative that can produce baseload power for as little as 3c per Kwh. Its got a smaller footprint on the planet than any other powersource. Its cheaper to build than a nuclear reactor, even including the drilling of holes for the underground heat exchanger. Once built it's cheaper to run than coal fired powerstations because their's no ongoing mining costs.
Its going to last 10,000 years not 100. Its baseload power provision 24/7. It doesn't require mines. It doesn't create waste. The technology is now quite old and very mature.
21 countries have implemented Geothermal generators (though mostly using underground steam not HFR)
It also has the potential to provide a capcity for sinking carbon because CO2 can be used as the working fliud that's pumped through the underground heat exchanger. The more underground heat exchangers, to more green power you can produce and the more carbon you can capture. Its all win win win.
Nuclear is a distraction from the real option, not a practical alternative. I can't see why this keeps getting suggested when it's so dirty and expensive. Unless its ignorance or vested interest.
Geothermal power is available _today_, so why not put our efforts into that. At least it has a future.
http://e85.whipnet.net/alt.fuel/animal.fat.html
http://e85.whipnet.net/alt.fuel/biodiesel.generator.html
- by vanwahlgren July 5, 2008 11:57 AM PDT
- I totally agree. I think if you kill 10,000 chickens you may make enough of the so called "biodiesel" to run an engine for an hour or so. It takes a lot of energy to kill animals etc.. Poor performance!
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