Location: Yakima, Washington Owner: City of Yakima Engineer: Black & Veatch Contractor: Apollo, Inc. End of Useful Life The Yakima Regional Wastewater Treatment Plant (WWTP) produces an average of 57 .3 million cubic feet of biogas per year from their anaerobic digesters. This biogas is burned in boilers to provide heat for the plant and the anaerobic digestion process. Previously, Yakima Regional WWTP employed dual membrane gasholders for

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