mrstickball on 07 November 2009
Rath,
You are absolutely correct.
Anaerobic digestion is not a very efficient method of power generation compared to even renewables if the material is needing purchased. However, if it is free, then I could only assume that it'd be worthwhile for use. This idea is all about efficiency - ensuring nothing goes to waste. It's the equivalent of recycling biodegradable materials.
http://en.wikipedia.org/wiki/Anaerobic_digestion#Power_Generation
Back from the dead, I'm afraid.
