U.S. Wastewater Biogas Recovery Faces Challenges with Methane Leakage
A recent study highlights the challenges faced by U.S. wastewater treatment facilities in achieving net climate benefits from biogas recovery due to methane leakage. The study focuses on anaerobic digestion (AD) systems used in wastewater resource recovery facilities (WRRFs), which are designed to stabilize sludge and recover biogas. However, the effectiveness of these systems in reducing greenhouse gas emissions is compromised by methane leakage. The research identifies that methane leakage rates often exceed the thresholds necessary for achieving net-zero emissions, particularly in combined heat and power (CHP) and renewable natural gas (RNG) systems. The study emphasizes the need for better leak detection and mitigation strategies to ensure that biogas recovery contributes positively to climate goals. 
