Ameren pilot project explores converting hog manure gas to electricity

St. Louis, MO, Mar. 21, 2007 — Ameren announced that the company’s renewable energy department is working with the Illinois Environmental Protection Agency (EPA) and the University of Illinois-Chicago to study the feasibility of using methane gas from hog manure to generate heat and power at The Maschhoffs Inc. in Carlyle, Ill.

Ameren renewables executive Rich Wright says Ameren’s renewable energy team has been exploring a number of renewable energy options, but this is the first project ready to be announced publicly. The team is made up of representatives of AmerenEnergy Fuels and Services, the company’s non-rate-regulated fuels company, working with employees from other parts of Ameren.

Ameren contracted with energy consultants Sebesta Blomberg & Associates to conduct the study, which will conclude at the end of May 2007. If the results are favorable, Ameren would work to have an anaerobic digester and generator installed at the site by the end of the year.

Manure collected from the Maschhoff farm would be stored in the digester. Methane gas would then be siphoned off the manure and used to power the generator, which may have the potential to produce between 200 and 400 kilowatts of electricity. The electricity would be used by the farm, which has a peak electric demand of over 700 kilowatts. The heat created by the generator would be used to heat the digester.

“It would be a good deal for The Maschhoffs because it would collect a waste byproduct — methane gas — from the manure and convert it to energy for use on the farm,” says Wright.

The project also has benefits for Ameren.

“The primary benefit would be renewable energy credits, or CO2 offset credits, that Ameren could obtain to use in responding to various future government initiatives,” says Ameren strategic analyst Paul Pike. Pike notes that as a “greenhouse gas,” methane is 21 times as potent as carbon dioxide, meaning that each one-ton emission of methane gas captured and converted to energy equals 21 tons of CO2 not released into the environment. “The fact that these energy or offset credits are locally generated is also a benefit to the region rather, than buying credits from another state or country,” Pike says.

Ameren worked with the Illinois EPA to select the Maschhoff site after considering a number of other swine farms in the state. Illinois currently ranks number 5 nationally in hog production, and Wright says the Illinois EPA had been looking for ways to promote a CO2 sequestration program that rewards farmers for eliminating green house gases that are created by hog waste.

Steffen Mueller of the University of Illinois at Chicago’s Energy Resources Center says the university will provide approximately 12% of the funding for the feasibility study with Ameren supplying the remainder.

If it moves forward, Ameren would work with The Maschhoffs to pursue an Illinois Department of Commerce and Economic Opportunity grant and other funds to support development of the digester and generator, Wright says.

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