Skip to main content

Anaerobic Co-Digestion of Municipal Sludge and Biodiesel Fuel Production By-Products

Buy Article:

$17.50 plus tax (Refund Policy)

Or sign up for a free trial

Abstract:

Biodiesel fuel is an attractive renewable energy alternative that generates glycerol-rich byproducts. Stable anaerobic sludge digestion with continuously- or intermittently-fed biodiesel waste was demonstrated. Two parallel completely-mixed laboratory-scale mesophilic digesters were batch-fed once daily with municipal combined primary and secondary wastewater sludges at 15-day SRTs. The co-digester received daily biodiesel waste additions that increased its biodegradable COD load by 40% over that for the parallel control digester fed only with sludge. Without acclimation about 1.0% of the added biodiesel COD accumulated, but without VFA accumulation. After 32 days of acclimation, this COD was removed with almost complete conversion of the biodiesel waste to methane. Community analysis of the parallel reactors over time using terminal restriction fragment length polymorphism confirmed that co-digester metabolic steady-state was reached only after the bacterial community shift was complete. A feeding strategy that maintained stable anaerobic digestion with an intermittent biodiesel feeding period was also demonstrated.

Document Type: Research Article

DOI: https://doi.org/10.2175/193864708790893486

Publication date: 2008-01-01

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 These proceedings are not peer reviewed.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
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect 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