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The $271 million Piscataway Bioenergy Project in Accokeek, Maryland, processes biosolids from wastewater treatment to produce renewable natural gas (RNG) for Montgomery County's Ride On bus system. Opened in October 2024, the facility utilizes anaerobic digestion to capture methane gas, reducing greenhouse gas emissions for nearly 2 million residents. A contract with Montgomery County allows for the purchase of RNG, aligning with the county's Zero Emission Bus Transition Plan aimed at achieving zero emissions by 2035.