Claude, in general you may be right about the inadvisiability of holding
pigshit in water, but then is that not exactly what you need to do to harness
methane? If Mr. Cochrane is indeed trying to use the pigshit for biogas, well
I don't know, perhaps a ferrocement tank?
[permaculture] Pig shit/holding tanks,
Richard Forster, 07/30/2004