Cow Manure Turned To Electricity At Sonoma Organic Farm
ABC7/Bay City News, San Francisco, CA,  September 25, 2007

PETALUMA: Manure from 240 cows at an organic Petaluma dairy farm is
being converted into renewable electricity.

The Petaluma City Council and the U.S. Environmental Protection Agency
were at the St. Anthony Farm today where Sonoma County's first methane
digester went on line.

The digester will use bacteria to break down manure from the cows and
produce biogas which will then be converted into renewable electricity
in an adjacent generator.

At the heart of the system is a 27,000-square-foot covered manure lagoon
digester. Flushed manure from the organic dairy and wastewater from the
farm's creamery will be pumped to the 2.3 million gallon covered lagoon.
Microbes will then convert the organic matter into 17,000 cubic feet per
day of methane rich biogas.

The gas will then be channeled into a pipeline into an 80 kilowatt
generator that will operate 12 hours a day. The electricity will provide
a substantial portion of the dairy's milking center's and creamer's
needs and the heat from the generator's engine and exhaust system will
be captured to produce hot water for the farm.

St. Anthony Farm has been operated by the St. Anthony Foundation since
1952. The Foundation provides a place for the homeless and impoverished
to recover from alcohol and drug addiction. Participants work on the
lush 315-acre farm outside Petaluma. The farm became certified organic
in 1999.
Dr. Ann C. Wilkie                          Tel: (352)392-8699
Soil and Water Science Department          Fax: (352)392-7008
University of Florida-IFAS
P.O. Box 110960                         E-mail: [log in to unmask]
Gainesville, FL 32611-0960
Campus location: Environmental Microbiology Laboratory (Bldg. 246).
BioEnergy and Sustainable Technology Society