Release Time:2019-03-10  Hits:

Indexed by: Journal Article

Date of Publication: 2009-02-01

Journal: BIORESOURCE TECHNOLOGY

Included Journals: PubMed、SCIE

Volume: 100

Issue: 3

Page Number: 1048-1054

ISSN: 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.