期刊
BIORESOURCE TECHNOLOGY
卷 102, 期 11, 页码 6405-6413出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2011.03.043
关键词
Step feeding; UCT; Simultaneous nitrification and denitrification; Denitrifying phosphorus removal; Phosphorus uptake
资金
- National Key Science and Technology Special Projects of China [2008ZX07317007105, 2008ZX0731400801]
- Program for Korea-China Joint Research Project on Environmental Technology
An anoxic/oxic step feeding process was improved to enhance nutrient removal by reconfiguring the process into (1) anaerobic/anoxic/oxic step feeding process or (2) modified University of Capetown (UCT) step feeding process. Enhanced nitrogen and phosphorus removal and optimized organics utilization were obtained simultaneously in the modified UCT type with both internal and sludge recycle ratios of 75% as well as anaerobic/anoxic/oxic volume ratio of 1:3:6. Specifically, the UCT configuration and optimized operational conditions lead to the enrichment of denitrifying phosphorus removal microorganisms and achieved improved anaerobic P-release and anoxic P-uptake activities, which were beneficial to the denitrifying phosphorus removal activities and removal efficiencies. Due to high mixed liquor suspended solid and uneven distributed dissolved oxygen, 35% of total nitrogen was eliminated through simultaneous nitrification and denitrification process in aerobic zones. Moreover, 62 +/- 6% of influent chemical oxygen demands was involved in the denitrification or phosphorus release processes. Crown Copyright (C) 2011 Published by Elsevier Ltd. All rights reserved.
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