Sewage to Riches, via methane

Sewage Status Grows as Resource for Utilities to Skiers - Bloomberg: "United Utilities Plc and Severn Trent Plc, Britain’s biggest publicly traded water companies, are increasingly feeding human waste into tanks of bacteria whose methane emissions generate electricity.
Sewage-derived power supplies 22 percent of Severn Trent’s energy, almost double that of 2005. At United Utilities, it’s 14 percent. British utilities are shifting fecal matter to vats of bacteria that consume the waste, releasing biogas that’s burned to drive water treatment. The result is lower energy bills and surplus power sent to the grid that heat more U.K. tea kettles."

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