The Mesophilic and Thermophilic Anaerobic Digestion of Municipal Sludge and FOG
The anaerobic biodegradability of municipal primary sludge (PS), thickened waste activated sludge (TWAS) and fat, oil, and grease (FOG) was assessed using semi-continuous feed laboratory-scale anaerobic digesters and compared to the ultimate degradability obtained from 120-day batch digestion at 35°C. A mix of PS, TWAS and FOG (21/31/48% VS basis) was fed to an acid digester. The acid reactor effluent was fed to two parallel methane phase reactors operated at an HRT of 12 days and maintained at 35°C and 52°C, respectively. The acid-phase reactor achieved a 43% decrease in non-saturated fat and a 16, 26, and 20% increase of soluble COD, volatile fatty acids (VFAs), and ammonia, respectively. The methane-phase VS destruction in Run 2 was 85 and 97% biodegradable VS destruction at 35°C and 52°C, respectively. The methane yield was about 3 times larger compared to the case of digesting sludge without the FOG.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
Document Type: Research Article
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 These proceedings are not peer reviewed. A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.
WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
- Subscribe to this Title
- Membership Information
- About WEF Proceedings
- WEFTEC Conference Information
- Learn about the many other WEF member benefits and join today
- Ingenta Connect is not responsible for the content or availability of external websites