So I don't see this talked about much. It's a biogas collector ( basically free unlimited natural gas from your septic tank)
I had some friends who went through Central America and saw one in action where they were running an entire commercial kitchen from a community latrine.
...I don't know exactly how "legal" this is in the U.S., but I assume most of us aren't going off grid because we're super into laws and rules and stuff, lol.
Thoughts?