Effect of Sludge Retention Time on Nitrite Accumulation in Real-time Control Biological Nitrogen Removal Sequencing Batch Reactor

Chin.J.Chem.Eng. ›› 2011, Vol. 19 ›› Issue (3): 512-517.

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Effect of Sludge Retention Time on Nitrite Accumulation in Real-time Control Biological Nitrogen Removal Sequencing Batch Reactor

WU Changyong^1,2, PENG Yongzhen^2,3, WANG Shuying², LI Xiaoling², WANG Randeng²

1. Research Center of Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China;
2. School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China;
3. Key Laboratory of Beijing for Water Environmental Recovery Engineering, Beijing University of Technology, Beijing 100022, China

Received:2010-07-22 Revised:2011-01-30 Online:2011-06-28 Published:2011-06-28
Supported by:
Supported by the National Key Technologies Research and Development Program of China during the Eleventh Five-year Plan Period(2006BAC19B03);the Project of Scientific Research Base and Scientific Innovation Platform of Beijing Municipal Education Commission(PXM2008_014204_050843;the State Key Laboratory of Urban Water Resource and Environment(HIT)(QAK201006)

Effect of Sludge Retention Time on Nitrite Accumulation in Real-time Control Biological Nitrogen Removal Sequencing Batch Reactor

吴昌永^1,2, 彭永臻^2,3, 王淑莹², 李晓玲², 王然登²

1. Research Center of Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China;
2. School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China;
3. Key Laboratory of Beijing for Water Environmental Recovery Engineering, Beijing University of Technology, Beijing 100022, China

通讯作者: PENG Yongzhen, E-mail: pyz@bjut.edu.cn
基金资助:
Supported by the National Key Technologies Research and Development Program of China during the Eleventh Five-year Plan Period(2006BAC19B03);the Project of Scientific Research Base and Scientific Innovation Platform of Beijing Municipal Education Commission(PXM2008_014204_050843;the State Key Laboratory of Urban Water Resource and Environment(HIT)(QAK201006)

Abstract

Abstract: In this study,four sequencing batch reactors(SBR),with the sludge retention time(SRT)of 5,10,20 and 40 d,were used to treat domestic wastewater,and the effect of SRT on nitrite accumulation in the biological nitrogen removal SBR was investigated.The real-time control strategy based on online parameters,such as pH,dissolved oxygen(DO)and oxidation reduction potential(ORP),was used to regulate the nitrite accumulation in SBR. The model-based simulation and experimental results showed that with the increase of SRT,longer time was needed to achieve high level of nitritation.In addition,the nitrite accumulation rate(NAR)was higher when the SRT was relatively shorter during a 112-day operation.When the SRT was 5 d,the system was unstable with the mixed liquor suspended solids(MLSS)decreased day after day.When the SRT was 40 d,the nitrification process was significantly inhibited.SRT of 10 to 20 d was more suitable in this study.The real-time control strategy combined with SRT control in SBR is an effective method for biological nitrogen removal via nitrite from wastewater.

Key words: biological nitrogen removal, nitrite accumulation, real time control, sludge retention time, sequencing batch reactors

摘要： In this study,four sequencing batch reactors(SBR),with the sludge retention time(SRT)of 5,10,20 and 40 d,were used to treat domestic wastewater,and the effect of SRT on nitrite accumulation in the biological nitrogen removal SBR was investigated.The real-time control strategy based on online parameters,such as pH,dissolved oxygen(DO)and oxidation reduction potential(ORP),was used to regulate the nitrite accumulation in SBR. The model-based simulation and experimental results showed that with the increase of SRT,longer time was needed to achieve high level of nitritation.In addition,the nitrite accumulation rate(NAR)was higher when the SRT was relatively shorter during a 112-day operation.When the SRT was 5 d,the system was unstable with the mixed liquor suspended solids(MLSS)decreased day after day.When the SRT was 40 d,the nitrification process was significantly inhibited.SRT of 10 to 20 d was more suitable in this study.The real-time control strategy combined with SRT control in SBR is an effective method for biological nitrogen removal via nitrite from wastewater.

关键词: biological nitrogen removal, nitrite accumulation, real time control, sludge retention time, sequencing batch reactors

WU Changyong, PENG Yongzhen, WANG Shuying, LI Xiaoling, WANG Randeng. Effect of Sludge Retention Time on Nitrite Accumulation in Real-time Control Biological Nitrogen Removal Sequencing Batch Reactor[J]. Chin.J.Chem.Eng., 2011, 19(3): 512-517.

吴昌永, 彭永臻, 王淑莹, 李晓玲, 王然登. Effect of Sludge Retention Time on Nitrite Accumulation in Real-time Control Biological Nitrogen Removal Sequencing Batch Reactor[J]. Chinese Journal of Chemical Engineering, 2011, 19(3): 512-517.

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[1]	SUN Hongwei, YANG Qing, PENG Yongzhen, SHI Xiaoning, WANG Shuying, ZHANG Shujun. Nitrite Accumulation during the Denitrification Process in SBR for the Treatment of Pre-treated Landfill Leachate [J]. , 2009, 17(6): 1027-1031.
[2]	WANG Jianlong, PENG Yongzhen, WANG Shuying, GAO Yongqing. Nitrogen Removal by Simultaneous Nitrification and Denitrification via Nitrite in a Sequence Hybrid Biological Reactor [J]. , 2008, 16(5): 778-784.
[3]	ZHU Guibing, PENG Yongzhen, WANG Shuying, ZUO Jinlong, WANG Yayi, GUO Jianhua. Development and experimental evaluation of a steady-state model for the step-feed biological nitrogen removal process [J]. , 2007, 15(3): 411-417.

Effect of Sludge Retention Time on Nitrite Accumulation in Real-time Control Biological Nitrogen Removal Sequencing Batch Reactor

Effect of Sludge Retention Time on Nitrite Accumulation in Real-time Control Biological Nitrogen Removal Sequencing Batch Reactor

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