Household Sewage: Not Waste, but a Vast New Energy Resource

http://www.sciencedaily.com/releases/2011/01/110105121131.htm

ScienceDaily (Jan. 5, 2011) — In a finding that gives new meaning to the adage, "waste not, want not," scientists are reporting that household sewage has far more potential as an alternative energy source than previously thought. They say the discovery, which increases the estimated potential energy in wastewater by almost 20 percent, could spur efforts to extract methane, hydrogen and other fuels from this vast and, as yet, untapped resource.

----- (skipping)

..