화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.28, No.5, 1233-1240, May, 2011
DOI10.1007/s11814-010-0502-2  Export Citation
Simulation and performance evaluation of the anoxic/anaerobic/aerobic process for biological nutrient removal
Zhen Zhou†, Zhichao Wu1, Zhiwei Wang1, Shujuan Tang1, Guowei Gu1, Luochun Wang, Yingjun Wang, and Zhiling Xin
  • School of Energy and Environmental Engineering, Shanghai University of Electric Power, Shanghai 200090, China
  • 1State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
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As a modified configuration of the conventional anaerobic/anoxic/aerobic (AAO) process, a novel anoxic/ anaerobic/aerobic (Reversed AAO, RAAO) process has been extensively applied in domestic wastewater treatment plants (WWTP). In this study, the Activated Sludge Model No. 2d (ASM2d) and a secondary clarifier model were calibrated and applied to simulate a pilot-scale RAAO test and evaluate the operational performance of the RAAO process. For calibration of the biological model ASM2d, only four kinetic parameters were adjusted to accurately simulate in-process variations of ammonium, nitrate and phosphate. Simulation results by the calibrated model demonstrated that phosphorus accumulating organisms (PAO) in the RAAO process (0.243 gP·(gCOD)^(-1)) contains less poly-phosphate than the AAO process (0.266 gP·(gCOD)^(-1)). With the increasing mixed liquor recirculation ratio in the RAAO process, the fraction of heterotrophic biomass and autotrophic biomass both increased, whereas the PAO decreased owing to adverse effects of electron acceptors on phosphorus release and poly-hydroxy-alkanoates synthesis.
Keywords:Wastewater Treatment;Biological Nutrient Removal;Simulation;Activated Sludge;Calibration
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