Competition for Single Carbon Source Between Denitrification and Phosphorus Release in Sludge under Anoxic Condition

›› 2010, Vol. 18 ›› Issue (3): 472-477.

Competition for Single Carbon Source Between Denitrification and Phosphorus Release in Sludge under Anoxic Condition

彭赵旭¹, 彭永臻^1,2, 桂丽娟¹, 刘旭亮¹

1. School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China;
2. College of Environment and Energy Engineering, Beijing Institute of Technology, Beijing 100022, China

收稿日期:2009-07-06 修回日期:2010-03-15 出版日期:2010-06-28 发布日期:2010-06-28
通讯作者: PENG Yongzhen,E-mail:pyz@bjut.edu.cn
基金资助:
Supported by the Scientific Innovation Platform of Beijing Municipal Education Commission(PXM2008_014204_050843);State Key Laboratory of Urban Water Resource and Environment(HIT)(QAK200802);Environment and Water Industry(EWI)Development Scheme of Singapore—The Process Control and Enhanced Biological Nutrient Removal of CSTR Proc-ess(EDB S07/1-53974082)

Competition for Single Carbon Source Between Denitrification and Phosphorus Release in Sludge under Anoxic Condition

PENG Zhaoxu¹, PENG Yongzhen^1,2, GUI Lijuan¹, LIU Xuliang¹

1. School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China;
2. College of Environment and Energy Engineering, Beijing Institute of Technology, Beijing 100022, China

Received:2009-07-06 Revised:2010-03-15 Online:2010-06-28 Published:2010-06-28
Supported by:
Supported by the Scientific Innovation Platform of Beijing Municipal Education Commission(PXM2008_014204_050843);State Key Laboratory of Urban Water Resource and Environment(HIT)(QAK200802);Environment and Water Industry(EWI)Development Scheme of Singapore—The Process Control and Enhanced Biological Nutrient Removal of CSTR Proc-ess(EDB S07/1-53974082)

摘要/Abstract

摘要： In order to investigate the competition for carbon source between denitrification and phosphorus release processes,simultaneous phosphorus release and denitrification in sludge operated in anoxic,aerobic mode are investigated by varying the ratio of influent COD to nitrogenous compound concentration under anoxic condition using a lab-scale sequencing batch reactor(SBR).The results show that the nitrate reduction rate is nearly independent of the ratio of influent COD to nitrate under anoxic condition.More NO_x^--N in the influent leads to less PO₄^3--P release during the feeding period.However, PO₄^3--P release proceeds at a low rate simultaneously with denitrification even when the influent NO_x^--N concentration is as large as 20 mg·L^-1 and its rate is increased obviously when NO_x^--N is denitrified to a concentration lower than 0.5 mg·L^-1.The variation of pH during anoxic period gives some information about the biochemical reactions of denitrification and PO₄^3--P release.When more nitrate is present in the influent,more acetate uptake in feeding period is used for direct microorganism growth.

关键词: denitrification, SBR, phosphorus release, pH, organic substrate

Abstract: In order to investigate the competition for carbon source between denitrification and phosphorus release processes,simultaneous phosphorus release and denitrification in sludge operated in anoxic,aerobic mode are investigated by varying the ratio of influent COD to nitrogenous compound concentration under anoxic condition using a lab-scale sequencing batch reactor(SBR).The results show that the nitrate reduction rate is nearly independent of the ratio of influent COD to nitrate under anoxic condition.More NO_x^--N in the influent leads to less PO₄^3--P release during the feeding period.However, PO₄^3--P release proceeds at a low rate simultaneously with denitrification even when the influent NO_x^--N concentration is as large as 20 mg·L^-1 and its rate is increased obviously when NO_x^--N is denitrified to a concentration lower than 0.5 mg·L^-1.The variation of pH during anoxic period gives some information about the biochemical reactions of denitrification and PO₄^3--P release.When more nitrate is present in the influent,more acetate uptake in feeding period is used for direct microorganism growth.

Key words: denitrification, SBR, phosphorus release, pH, organic substrate

彭赵旭, 彭永臻, 桂丽娟, 刘旭亮. Competition for Single Carbon Source Between Denitrification and Phosphorus Release in Sludge under Anoxic Condition[J]. , 2010, 18(3): 472-477.

PENG Zhaoxu, PENG Yongzhen, GUI Lijuan, LIU Xuliang. Competition for Single Carbon Source Between Denitrification and Phosphorus Release in Sludge under Anoxic Condition[J]. , 2010, 18(3): 472-477.

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Competition for Single Carbon Source Between Denitrification and Phosphorus Release in Sludge under Anoxic Condition

Competition for Single Carbon Source Between Denitrification and Phosphorus Release in Sludge under Anoxic Condition

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