I've toured a few anaerobic digesters through the years, one in London and one actually in my own riding. He has a large beef cattle feedlot. He has his manure in one tank, and in the other he has scrap food shipped in from all over the region. They mix it together. He has two converted diesel Cat engines that go off of methane.
I mean, you can do it, but it's a tremendous, tremendous cost to have just one farm like that in one area. Now, that was good, because there were some at-risk small little lakes, so it kind of cleaned them up pretty nice.
So it can be done, but it's quite a cost. You'd have to really put the economics behind it on that one.