期刊
BIORESOURCE TECHNOLOGY
卷 102, 期 10, 页码 5722-5727出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2011.02.114
关键词
A(2)/O-BAF system; Nitrate recycling ratio; Simultaneous biological nitrogen and phosphorus removal; Denitrifying phosphorus removal; Low C/N ratio domestic wastewater
资金
- 11th National Key Science and Technology Special Projects (China) [2008ZX07317-007-105, 2008ZX07209-003]
- State Key Laboratory of Urban Water Resource and Environment (HIT) (China) [QAK200802]
A novel system integrating anaerobic/anoxic/oxic (A(2)/O) and biological aerated filter (BAF), which could solve the sludge retention time (SRT) conflicting problem between nitrifiers and polyphosphate accumulating organisms (PAOs) by shortening SRT for PAOs in A(2)/O and lengthening SRT for nitrifiers in BAF, was investigated in this study. Various nitrate recycling ratios (100%, 200%, 300% and 400%) were applied to a lab-scaled A(2)/O-BAF system to detect the simultaneous biological nitrogen and phosphorus removal performance while treating real domestic wastewater with low carbon to nitrogen (C/N) ratio. The concentrations of chemical oxygen demand (COD), NH4+-N and total phosphorus (TP) in the effluent were less than 50.0, 0.5 and 0.5 mg/L, respectively, throughout the experiments. The removal efficiencies of total nitrogen (TN) were 64.9%, 77.0%, 82.0% and 87.0%, under respective nitrate recycling ratios (increasing from 100% to 400%). By contrast, nitrate recycling ratios had neglectable effect on the removal efficiencies of COD and NH4+-N. (C) 2011 Elsevier Ltd. All rights reserved.
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