My reading of the November 2000 Permaculture Activist article explicitly said that Pain did not focus on detailing how he extracted methane from the compost. Based on the accounts I have read, the methane is not derived from thePain's booklet details his process which includes a 4 cubic meter tank embedded in the pile.
compost, but rather a methane digester was imbedded in the pile to take
advantage of compost heat to maximize the rate of methanogenesis. The
primary function of the pile was production of heat (for hot water) and
organic matter for farming, with enhancement of methane production as a
supplemental yield.
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