find the following three books:
Methane: planning a digester by Peter-John Meynell 1976
Methane generation form human, animal and agricultural wastes By National academy of sciences 1977
and
Practical building of methane power plants for rural energy Independence by l. John Fry. 1974
I could not find any newer books, but I have all three of these and they are really good especially the last one. I've been looking into building one here to help clean up the manure from 6 horses, 30 plus chickens, 3 dogs and a rabbit. Plus it makes a better fertilizer for the horse manure then composting it.
Methane: planning a digester by Peter-John Meynell 1976
Methane generation form human, animal and agricultural wastes By National academy of sciences 1977
and
Practical building of methane power plants for rural energy Independence by l. John Fry. 1974
I could not find any newer books, but I have all three of these and they are really good especially the last one. I've been looking into building one here to help clean up the manure from 6 horses, 30 plus chickens, 3 dogs and a rabbit. Plus it makes a better fertilizer for the horse manure then composting it.