Anaerobic Membrane Bioreactors (AnMBR) For WAS Digestion: Tubular Versus Hollow Fiber (HF) Membranes
Abstract:Anaerobic digestion is a common technology that is employed for reducing the quantity of solids that are generated in wastewater treatment while also generating a biogas that can be employed as an alternative fuel thereby increasing the sustainability of these facilities. However, hydrolysis processes typically limit the rate of anaerobic digestion, particularly of secondary sludges, and hence extended solids residence times in digestion are required. The extended solids residence times lead to large digester volumes with substantial capital costs and operating costs associated with heating, mixing and pumping. The implementation of anaerobic membrane bioreactors (AnMBRs) for sludge digestion can decouple solids residence times from hydraulic residence times thereby facilitating a substantial reduction in digester volume while maintaining good solids destruction. This paper presents the results of pilot scale studies that examined the use of tubular and hollow fiber (HF) anaerobic membrane bioreactors (AnMBRs) for anaerobic digestion of waste activated sludge (WAS). The results indicate that both membrane digesters showed comparable CODT and VS removals of 47.6 and 49.1% respectively while maintaining a throughput that was 2 times that of the control digester. The average fluxes for the neutral and negative tubular membranes were 32.3±0.8 and 38.6±2.1 LMH when operated at a TMP of 30 kPa. The HF membranes were operated at a constant flux of 11±0.7 LMH and the average TMP was less than 10 kPa.
Document Type: Research Article
Publication date: 2011-01-01
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 These proceedings are not peer reviewed.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