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Old 02-28-2013, 08:36 PM   #503 (permalink)
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Join Date: May 2008
Location: Maynard, MA Eaarth
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Mica Blue - '05 Scion xA RS 2.0
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Methane digesters can use sewage which produces both methane and fixed nitrogen fertilizer. They also can be run on plant or animal farm waste; in Germany they use the corn *stalks* to produce biogas for their peaker plants. It can be produced and stored the same way natural gas can.
Sincerely, Neil