Wastewater = energy source?

PhysOrg: Wastewater may be a valuable energy source: "research revealed that the wastewater contained enough organic material to potentially produce 113 megawatts of electricity or close to 990 million kilowatt hours a year. "



Sounds almost too good to be true, but actually once we start heading down the bio-mimicry route of reuse and recylce and looking at all the angles. However there comes a point in a post -oil world when such things make economic as well as ecological sense.