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11/6/2007 <br />WATER POLLUTION CONTROL PLANT <br />CO -GENERATION PROJECT <br />Facilities and Transportation Committee <br />November 6, 2007 <br />SEARCH FOR ENERGY EFFICIENCY <br />o In 2007, a study of possible energy savings at <br />City facilities was performed <br />o Buildings, street lights, and the Water Pollution <br />Control Plant were the focus of the study <br />o Generally minimal savings opportunities were <br />identified <br />o Only the WPCP projects were found to be <br />economically beneficial <br />WPCP OPERATION <br />o Methane gas is <br />produced as part of <br />the digester process <br />o Gas is used to <br />generate heat for the <br />digester processIf <br />o Excess gas is burned <br />off <br />o WPCP had old co -gen <br />system that is no <br />longer permissable <br />