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Indexed by:期刊论文

Date of Publication:2009-02-01

Journal:BIORESOURCE TECHNOLOGY

Included Journals:SCIE、PubMed

Volume:100

Issue:3

Page Number:1048-1054

ISSN No.:0960-8524

Key Words:Membrane bioreactor; Denitrifying phosphorus removal; Short-cut nitrification; Simultaneous nitrification and denitrification (SND)

Abstract:Biological nutrient removal was investigated in a combined modified University of Cape Town and membrane bioreactor system. When the influent nutrient mass ratio (COD/TN/TP) was 28.5/5.1/1 to 28.5/7.2/1, average removal efficiencies of COD, TN and TP were 90%, 81.6%. 75.2%. Obvious denitrifying phosphorus removal occurred with C/N ratio 3.98. When nitrite was the main electron acceptor, the ratio of denitrifying phosphate uptake to the total phosphate uptake were 99.8% and the sludge yield was 0.28 kg VSS/kg COD; when nitrate was the main electron acceptor, the ratio was 92% and the yield was 0.32 kg VSS/kg COD. In case of nitrite, the system not only kept TP and TN removal at 89.1% and 82.2%, but also ensured less sludge production. Batch tests showed that the proportion of denitrifying phosphorus-accumulating organisms in the total phosphorus-accumulating organisms in the system was higher than 80%. (c) 2008 Elsevier Ltd. All rights reserved.