Last week, I wrote about a farm in China that will power itself entirely with chicken manure. Now poop power has made it to mainstream America with an announcement that the California State Fair will play host to the first known amusement ride powered by cow manure.

The Barnyard Animal Train will use excrement from California dairy cows to create renewable biogas. Kids taking a ride on the train will also have the opportunity to learn about renewable energy— and of course, will get to experience it firsthand.

At first glance, this may not seem like a big deal. But state fairs around the United States are joining the alternative energy wagon, albeit not always by using cow manure.

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In the race to implement new energy sources, farms have an advantage: lots of manure. A large chicken farm north of Beijing is taking advantage of this fact by using its chicken manure to generate power and heat. And this isn’t just a small-time farm—the 3 million chickens on the farm produce 220 tons of manure and 170 tons of wastewater each day.

The Deqingyuan Chicken Farm Waste Utilization Plant, which is replacing a coal-fired plant, will reduce CO2 emissions by 95,000 tons a year. It will also provide 14,600 MWh of electricity each year.

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But is it greenwashing?

Anheuser-Busch, the largest brewer in the US, announced today that its breweries will rely on renewable energies for 15 percent of their needs by 2010. The Houston brewery plans to use biogas from a nearby landfill combined with an on-site bio-energy recovery system (BERS) that will make use of brewing wastewater, and the Fairfield, California facility will use solar panels in addition to a BERS. The other US breweries will use only BERS.

When the facilities are completed, 10 out of the 12 Anheuser-Busch breweries in the US will use alternative fuels.

It’s tempting to shake our heads and exclaim that this is just another example of meaningless corporate greenwashing. But that might not be entirely true.

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In a new study published in the online journal Environmental Research Letters, Amanda Cuéllar and Michael Webber conclude that harnessing the full potential of cow poop power could not only help generate as much — or more — electricity as wind and solar power do today, but could greatly reduce greenhouse gas emissions.

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“Maker’s Mark’s new facility will anaerobically treat the liquid portion of the whole stillage and process waters produced during bourbon-making, generating methane-rich biogas, a renewable energy source, that will offset 165 MMBtu, or 15 - 30%, of the facility’s natural gas consumption.”

Ecovation is also working with Simi Winery in Sonoma County, to help lighten the burden on publicly-owned treatment facilities by using an ecologically sound method of pre-treating wastewater. The company won a 2007 Environmental Excellence Award from the New York State Department of Environmental Conservation for its dairy waste stream management solution for Breyers Yogurt Co.

Image Credit: Maker’s Mark

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As if cooking, cleaning, and child-rearing were not enough, the women of Santa Fe also lead a powerful organization, the Santa Fe Women’s Group, which fulfills many vital roles for the community. One of the group’s biggest projects has been producing biogas.

The Project

The Santa Fe Biogas project, in its initial stages, was simply a concern communicated in Women’s Group meetings: “How can we avoid buying expensive tanks of gas and inhaling smoke in the kitchen?”

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Congress and the president have spoken: ethanol is America’s new renewable fuel.

Yesterday, President Bush signed into law energy bill H.R.6, which establishes a new renewable fuel standard in the United States (see Max’s earlier post). But not everyone is applauding Capitol Hill. James B. Meigs, editor-in-chief of Popular Mechanics, has railed against ethanol in an op-ed to be published in the magazine’s February 2008 issue. As Meigs points out, Washington is looking for quick fixes, not long-term solutions:

It’s great that our politicians have discovered the need for new energy technologies. But it appears that Washington is determined to put its money—our money—on the wrong horse. Right now, researchers are studying a host of energy solutions, including hydrogen, high-mileage diesel, plug-in hybrids, radical reductions in vehicle weight and cellulosic ethanol (made from cornstalks, switchgrass or other nonfood crops). It is far too soon to say which of these holds the most promise. But, instead of promoting experimentation and competition to find the best solutions, politicians seem ready to declare ethanol the winner. As a result, our nation could wind up with the worst of both worlds: an “alternative” energy that is enormously expensive yet barely saves a gallon of oil.

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