Denitrification and Dephosphatation by Anaerobic/Anoxic Sequencing Batch Reactor

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Denitrification and Dephosphatation by Anaerobic/Anoxic Sequencing Batch Reactor

PENG Yongzhen^a; LI Yongzhi^a,b; WANG Shuying^a; WANG Yayi^c

^a College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100022, China
^b College of Chemical and Environmental Engineering, Beijing Technology and Business University, Beijing 100037, China
^c College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310014, China

Received:1900-01-01 Revised:1900-01-01 Online:2004-12-28 Published:2004-12-28
Contact: PENG Yongzhen

厌氧／缺氧SBR反硝化除磷过程的研究

彭永臻^a; 李勇智^a,b; 王淑莹^a; 王亚宜^c

^a College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100022, China
^b College of Chemical and Environmental Engineering, Beijing Technology and Business University, Beijing 100037, China
^c College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310014, China

通讯作者: 彭永臻

Abstract

Abstract: Removal of denitrifying phosphorus was verified in a laboratory anaerobic/anoxic sequencing batch reactor (A/A SBR). The results obtained demonstrated that the anaerobic/anoxic strategy can enrich the growth of denitrifying phosphorus removing bacteria (DPB) and take up phosphate under anoxic condition by using nitrate as the electron acceptor. The phosphorus removal efficiency was higher than 90% and the effluent phosphate concentration was lower than 1mg·L^-1 after the A/A SBR was operated in a steady-state. When the chemical oxygen demand(COD) of influent was lower than 180mg·L^-1, the more COD in the influent was, the higher efficiency of phosphorus removal could be attained under anoxic condition. However, simultaneous presence of carbon and nitrate would be detrimental to denitrifying phosphorus removal. Result of influence of sludge retention time (SRT) on denitrifying phosphorus removal suggested that the decrease of SRT caused a washout of DPB and consequently the enhanced biological phosphorus removal decreased with 8 days SRT. When the SRT was restored to 16 days, however, the efficiency of phosphorus removal was higher than 90%.

Key words: denitrifying phosphorus removal, anoxic phosphorus uptake, biological phosphorus removal, denitrifying phosphorus removing bacteria

摘要： Removal of denitrifying phosphorus was verified in a laboratory anaerobic/anoxic sequencing batch reactor (A/A SBR). The results obtained demonstrated that the anaerobic/anoxic strategy can enrich the growth of denitrifying phosphorus removing bacteria (DPB) and take up phosphate under anoxic condition by using nitrate as the electron acceptor. The phosphorus removal efficiency was higher than 90% and the effluent phosphate concentration was lower than 1mg·L^-1 after the A/A SBR was operated in a steady-state. When the chemical oxygen demand(COD) of influent was lower than 180mg·L^-1, the more COD in the influent was, the higher efficiency of phosphorus removal could be attained under anoxic condition. However, simultaneous presence of carbon and nitrate would be detrimental to denitrifying phosphorus removal. Result of influence of sludge retention time (SRT) on denitrifying phosphorus removal suggested that the decrease of SRT caused a washout of DPB and consequently the enhanced biological phosphorus removal decreased with 8 days SRT. When the SRT was restored to 16 days, however, the efficiency of phosphorus removal was higher than 90%.

关键词: 废水处理;厌氧条件;缺氧条件;SBR;反硝化除磷;顺序间歇反应器;生物营养素

PENG Yongzhen, LI Yongzhi, WANG Shuying, WANG Yayi. Denitrification and Dephosphatation by Anaerobic/Anoxic Sequencing Batch Reactor[J]. , DOI: .

彭永臻,李勇智,王淑莹,王亚宜. 厌氧／缺氧SBR反硝化除磷过程的研究[J]. , DOI: .

[1]	LIU Hui, SUN Yanfu, JIA Xiaoshan, LI Jun, ZHOU Kangqun, QU Xiangdong, TAO Xueqin, CHEN Yu. Identification and Metabolic Mechanism of Non-fermentative Short-cut Denitrifying Phosphorus-removing Bacteria [J]. Chin.J.Chem.Eng., 2013, 21(3): 332-340.
[2]	LIU Wei, YANG Dianhai, XU Li, JIA Chuan, LU Wenjian, BOSIRE Omosa Isaiah, SHEN Changming. Effect of Return Sludge Pre-concentration on Biological Phosphorus Removal in a Novel Oxidation Ditch [J]. Chin.J.Chem.Eng., 2012, 20(4): 747-753.