What if every time that you flushed your toilet you could generate just a little bit of power? That is the idea behind the Benkatine Turbine by Leviathan Energy, which aims to get power from any pipe that water rushes through. So not only could you install this within a municipal system, but according to the company, you could get power from the water rushing down your gutter drains!
More: POOPTRICITY: Want Electricity? Flush Your Turbine Toilet!