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Title: Post-treatment of anaerobic effluents
Keywords: Post-treatment, anaerobic effluents, conventional activated sludge, membrane bioreactor
Issue Date: 23-Apr-2009
Citation: TIEW SIOW WOON (2009-04-23). Post-treatment of anaerobic effluents. ScholarBank@NUS Repository.
Abstract: The post-treatment study for anaerobic effluents was carried out in 2 phases with different focuses. Both laboratory-scale Conventional Activated Sludge (CAS) and Membrane Bioreactor (MBR) were set up for the study. Phase 1 focused on organic removal and nitrification. The study showed that MBR was able to achieve better performance for organic removal due to its good solid-liquid separation. In addition, the longer solid retention time (SRT) of MBR enhanced the degradation of less biodegradable substances. In phase 2, raw sewage was added to the anaerobic effluents to increase the organics in feed. It was found that the increase of organic concentration in the feed improved the nitrogen removal of aerobic post-treatment significantly. 50% raw sewage addition is the most ideal as the removal performances for nitrogen and organics were relatively high. In addition, it reduced the capacity of the pre-treatment while maximized the use of aeration in the post-treatment.
Appears in Collections:Master's Theses (Open)

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