Biosolids Digesters Facilities

construction

UPDATEChanges to the Biosolids' Biogas ProjectBiogas is a byproduct of the biosolids digestion treatment process. Our original plans for the Biosolids Digester Facilities Project included reusing 100% of the biogas, however we recently made changes to how the biogas will be used. The new plan will convert the biogas to renewable natural gas for injection into PG&E's existing gas pipeline. For more information, read frequently asked questions for the Biogas Utilization Project.As part of the Sewer System Improvement Program (SSIP), we are investing over $3 billion to upgrade and modernize the aging Southeast Treatment Plant to reduce odors, be better prepared for earthquakes and sea level rise, and ensure operational redundancy and efficiency. When complete, the city’s largest wastewater pollution treatment plant will be transformed into a resource recovery facility that smells better, looks better and works better.