Even if all this seems too much work for you, according to the Bioastronautics Data Book, even feces left unattended and just sitting there will produce up to 1 ml of methane per gram of poop. And that seems to continue for up to the two weeks the tests were run.

Advertisement

As with the fart-collection, working collectively will likely be a better plan here, to take advantage of economies of scale and have a shared facility to compress the gas and get it into safe CNG tanks. If "safe" and "compressed" sound like sissy candy-assed ideas to you, there is one other option: giant gas bags.

Advertisement

Beginning around WWI, popular from desperation in WWII, and even up until fairly recently for buses in China, gas bag cars have been developed to run on uncompressed natural gas (or wood gas, etc). Since the gas is not compressed, it takes up a huge volume of space, which is why those bags are so damn big. Still, you don't really need a fuel gauge when you can just look at your car and see how deflated the massive rubberized sack is on your roof.

Advertisement

Gas bag cars aren't really the most practical solution, but if you've got no other choice, it'll work. I imagine you could take something like a rubber raft and use it as a decent gas bag. Just fill it up from the gas hose from your biodigester, bungie it to your roof (I suggest a roof rack), and run a line from it right into your car's intake manifold. Simple, right?

Look at all these great options. No matter what the fuel situation is in the future, we should always be able to enjoy having cars, because there's literally solutions we can pull right out of our asses.