Energy Efficiency And Biogas Generation At Wastewater Plants
Central Marin Sanitation Agency cleaned out and is upgrading its existing digesters with membrane covers and pump mixing systems (inside of cleaned digester shown above). Photo courtesy of CMSA

Anaerobic digestion systems are being upgraded to accept food waste and FOG to boost energy generation.
Diane Greer
BioCycle July 2012, Vol. 53, No. 7, p. 37