A new method to treat sewage can efficiently convert leftover sludge to biogas, an advance that could help communities lower their waste treatment costs while helping the environment.
February 25, 2021
By Maegan Murray, WSU Tri‑Cities
RICHLAND, Wash. – A professor with the Bioproducts, Sciences and Engineering Laboratory at Washington State University Tri-Cities is developing a way to drastically improve energy production at small waste water treatment plants. The research has the potential to be scaled globally.
Birgitte Ahring, professor of biological systems engineering and chemical engineering, received a $2.5 million grant from the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy for the project. She is partnering locally with the Walla Walla Wastewater Treatment Plant, the Pacific Northwest National Laboratory and Clean-Vantage, LLC.
Sewage sludge is a remnant semi-solid material produced at sewage treatment plants. Ahring said while a portion of sludge is converted into biogas, at a mixture of 60% methane and 40% carbon dioxide at the majority of wastewater treatment facilities in the U.S., there still remains a significan
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