Tapping Into a Constant Resource: Sewage Geothermal (Philadelphia Inquirer)
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| (Courtesy NovaThermal Energy) |
Among the many renewable energy sources — wind, solar, hydroelectric, biofuels — there is one to which we all contribute that has not yet managed to attract the romantic advocates who have embraced other forms of green energy.
We’re speaking about the gray river of warmth flowing right beneath our feet: sewage.
A Philadelphia company, NovaThermal Energy L.L.C., wants to heat and cool buildings by tapping into the constant, guaranteed heat contained in wastewater. The process is called sewage geothermal.