The utility had an excellent opportunity to implement a green initiative. Energy could be created from excess digester gas at the wastewater treatment plant. There seemed to be a full range of feasible options after an engineering analysis.
“We can convert the gas and use it to either heat the building or reuse it to make the wastewater treatment process more efficient,” explained the chief engineer. “it is a 10- to 15-year payback, but the regulators love it so it is easy to get approved. It will buy us some goodwill too.”
“Can we reduce the payback if we sell the energy to the electric grid?” asked the chief financial officer.
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