OPERATING THRESHOLDS FOR SINGLE STAGE NITRIFICATION IN MUNICIPAL IFAS AND MBBR SYSTEMS AS MEASURED IN TERMS OF MINIMUM HYDRAULIC RETENTION TIMES AND MIXED LIQUOR MCRT
Authors: Sen, Dipankar; Copithorn, Rhodes R.; Randall, Clifford W.
Source: Proceedings of the Water Environment Federation, WEFTEC 2005: Session 71 through Session 80 , pp. 6217-6237(21)
Publisher: Water Environment Federation
Abstract:This paper presents suggested guidelines based on the results of research on several IFAS (Integrated Fixed Film Activated Sludge) and MBBR (Moving Bed Bioreactor) full scale and pilot plants which were retrofitted into existing municipal activated sludge systems. The research has identified methods to compare the operating thresholds of each of four systems: (1) activated sludge, (2) IFAS with fixed media, (3) IFAS with moving bed, and (4) MBBR.
A three-step method is presented that may be used to determine the type of system (IFAS/MBBR) and the type of media to apply in the upgrade of the wastewater treatment plant. Operating thresholds in terms of the aerobic HRT and MCRT and the MLSS levels that the wastewater treatment plant can support are presented. For comparing various systems, this paper keeps the loading and temperature constant, based primary effluent with 250 mg/L COD and 25 mg/L TKN, and a mixed liquor temperature of 12 C.
Document Type: Research Article
Publication date: 2005
- 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 These proceedings are not peer reviewed.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