Increasing CHP Productivity While Reducing Biosolids Volume and Climate Changing Gasses

$17.50 plus tax (Refund Policy)

Buy Article:


This manuscript reports the first 30 months performance of POTW anaerobic digesters when feeding the pre-processed slurry produced from combining inedible kitchen grease (IKG) composed of fats, oils, and greases (FOG) with anaerobically digesting sewage solids to produce biogas for a combined heat and power (CHP) system. In 1993, the Millbrae facility began recording electronically solids processing data, such as the number of hauled loads, the wet ton weight of biosolids, polymer use relative to filter cake density/weight, electricity produced and bought, and digester stability. Comparison of these historical performance data with those of the first thirty months shows surprising results that yield benefits far greater than anticipated. These data indicate feeding pre-processed IKG into the Millbrae wastewater anaerobic digesters steadily and substantially increases the amounts of biogas produced, decreases the volume of biosolids disposed of by a sustainable 32%, improves the stability of digester operations, and improves biosolids dewaterability.

Keywords: CHP; FOG; IKG; Millbrae; acid phase digestion; anaerobic digester; biogas; biosolids

Document Type: Research Article


Publication date: January 1, 2009

More about this publication?
  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access.
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • ingentaconnect is not responsible for the content or availability of external websites



Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more