Well, I'm not sure about everyone else, but I think the most exciting thing about biogas is the use of human and animal waste along with true food waste, not switchgrass or corn cobs. Why? Because you take pure waste products, extract gas from them and use the remnants as fertilizer and a soil enricher. It can't get any better than that! I also thought that for electricity (and also light) it would be best to tie a sytem like this into a methane or propane generator, and then also use the gas for cooking or also gas heat. I know that companies add sulfur to natural gas and it seems to burn off fine. Does the H2S burn off as easily as the sulfur they add or are they two different animals? Anyway I think using products that could feed cattle or livestock is a waste. I wouldn't be raising pigs personally, so kitchen waste (there is youtube vidoe about this in india) and biological waste (hint, hint) is perfect for utilizing what could be a pest attractor or a pollutant and turning it into a beneficial and completely natural product that will help me grow more things and better!
Godbless,
Quranist