Today I'd like to highlight a couple of Youtube videos that focus on simple methane digesters. I think with all the discussion about methane digesting and its potential for adding energy to grid while disposing of waste, this is worth your time for personal enlightenment. Of course, these are highly simplified digesters when compared to even the on-farm ones that have popped up in a few places, but it's the general idea that's pretty cool. Both of the videos are essentially the same but for a more rustic touch, I'd definitely go with this one. He made a longer version too, but the outtakes are more just mistakes happening than anything else.
What's really fantastic about this to me is that it's always just a matter of time before someone figures out how to utilize something else that we consider waste and they turn it into something productive and useful in their lives. I have to wonder if the energy put into this is exceeded by the eventual output before the structure lifecycle is reached, but that's a question for the future and experts to decide.