倒置A2/O与常规A2/O工艺除磷效果对比

金鹏康; 郑未元; 王先宝; 张雨; 王晓昌; 孙红芳

doi:10.12030/j.cjee.20150201

环境工程学报

倒置A2/O与常规A2/O工艺除磷效果对比

, , , , ,

金鹏康, 郑未元, 王先宝, 张雨, 王晓昌, 孙红芳. 倒置A2/O与常规A2/O工艺除磷效果对比[J]. 环境工程学报, 2015, 9(2): 501-505. doi: 10.12030/j.cjee.20150201

引用本文:

金鹏康, 郑未元, 王先宝, 张雨, 王晓昌, 孙红芳. 倒置A2/O与常规A2/O工艺除磷效果对比[J]. 环境工程学报, 2015, 9(2): 501-505. doi: 10.12030/j.cjee.20150201

Jin Pengkang, Zheng Weiyuan, Wang Xianbao, Zhang Yu, Wang Xiaochang, Sun Hongfang. Comparison of phosphorus removal efficiency between reversed and conventional A2/O processes[J]. Chinese Journal of Environmental Engineering, 2015, 9(2): 501-505. doi: 10.12030/j.cjee.20150201

Citation:

Jin Pengkang, Zheng Weiyuan, Wang Xianbao, Zhang Yu, Wang Xiaochang, Sun Hongfang. Comparison of phosphorus removal efficiency between reversed and conventional A2/O processes[J]. Chinese Journal of Environmental Engineering, 2015, 9(2): 501-505. doi: 10.12030/j.cjee.20150201

倒置A2/O与常规A2/O工艺除磷效果对比

1.
西安建筑科技大学环境与市政工程学院, 西安 710055
2.
西安市污水处理有限责任公司, 西安 710000
基金项目:
陕西省科技统筹创新工程(2011KTZB03-03-03)

国家"水体污染控制与治理"科技重大专项(2011ZX07302-001)

陕西省创新团队项目(IRT 2013KCT-13)

新世纪优秀人才项目(NCET-12-1043)

西安市科技计划项目(CX12160)
中图分类号: X703

Comparison of phosphorus removal efficiency between reversed and conventional A2/O processes

1.
School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
2.
Xi'an Wastewater Treatment Ltd., Xi'an 710000, China
Fund Project:

摘要: 通过对西安市某污水处理厂倒置A2/O工艺的沿程监测和工艺解析,分析明确了该工艺生物除磷效果差的影响因素。研究表明,缺氧池反硝化不完全,厌氧池高浓度硝酸盐是抑制聚磷菌释磷的重要因素。当厌氧池内硝酸盐浓度大于4 mg/L时会明显抑制生物除磷效果。硝酸盐的浓度在1~4 mg/L时,随着硝酸盐浓度的升高,释磷效果显著降低。为避免硝酸盐对聚磷菌的影响,需将厌氧池硝酸盐浓度控制在1 mg/L以下。硝酸盐对聚磷菌释磷的影响原因是生物脱氮除磷对碳源的竞争,以乙酸钠和原污水为碳源分析硝氮盐对释磷效果的影响。结果表明,易于生物降解的优质碳源更有利于聚磷菌在厌氧环境下释磷,倒置A2/O的前置式缺氧池首先将大量优质碳源用于反硝化,而造成后续厌氧池聚磷菌释磷效果差。针对这一研究结果,对该污水厂提出将倒置A2/O调整为常规A2/O的改造方案,改造后厌氧池硝酸盐浓度由3.57 mg/L降低至0.89 mg/L,聚磷菌释磷量提高1.8倍,系统除磷效果增强,出水总磷降低至0.66 mg/L,与倒置A2/O相比降低0.21 mg/L。
- 倒置A2/O /
- 常规A2/O /
- 释磷量 /
- 硝酸盐 /
- 碳源竞争
Abstract: Through the monitoring and analysis on the whole reversed A2/O process in a sewage treatment plant in Xi'an, the adverse factors for poor phosphorus removal were ascertained. The study shows that the denitrification is incomplete in the anoxic tank so that lots of nitrate flows into the anaerobic tank and inhibits phosphorus release, which leads to the poor phosphorus removal. The phosphorus release was inhibited gradually with the increase of nitrate when the nitrate concentration was between 1 mg/L and 4 mg/L. When nitrate concentration was above 4 mg/L, phosphorus release was inhibited significantly. In order to avoid the adverse effect of nitrate on phosphorus accumulating bacteria for phosphorus release, nitrate concentration in the anaerobic tank should be below 1 mg/L. The adverse effect of nitrate on phosphorus accumulating bacteria indicates that carbon source is required for phosphorus release. Therefore, the effect of nitrate on phosphorus release was studied by using sodium acetate and raw water as carbon source sampled from the wastewater treatment plant. The study shows that the easily biodegradable organic matter was more beneficial for phosphorus release in anaerobic tank. Because of the anoxic tank set as the first step in reversed A2/O process, a large amount of easily biodegradable organic matter is consumed first for denitrification in the anoxic tank, which lead to the poor effect of phosphorus release in anaerobic tank due to lack of easily biodegradable organic matter. In response to this study, a reconstruction scheme that the reversed A2/O process shall be adjusted to a conventional A2/O process was put forward. After the reconstruction project, the concentration of nitrate in anaerobic tank decreases from a previous one of 3.57 mg/L to the current one of 0.89 mg/L with the amount of phosphorus release increased by 1.8 times. The total phosphorus in the effluent is 0.66 mg/L which is 0.21 mg/L lower than that of the reversed A2/O process.
- reversed A2/O process /
- conventional A2/O process /
- phosphorus release amount /
- nitrate /
- carbon competition

[1]	张波, 高廷耀. 倒置A²/O工艺的原理与特点研究. 中国给水排水, 2000, 16(7): 11-15 Zhang Bo, Gao Tingyao. Principle and characteristics of reversed A²/O process. China Water & Wastewater, 2000, 16(7): 11-15(in Chinese)
[2]	毕学军, 张波. 倒置A²/O 工艺生物脱氮除磷原理及其生产应用. 环境工程, 2006, 24(3): 29-30 Bi Xuejun, Zhang Bo. The principle and full-scale application of reversed A²/O process for removing nitrogen and phosphorus. Environmental Engineering, 2006, 24(3): 29-30(in Chinese)
[3]	陈洪斌, 唐贤春, 何群彪, 等. 倒置AAO工艺聚磷微生物的吸磷行为. 中国环境科学, 2007, 27(1): 49-53 Cheng Hongbin, Tang Xianchun, He Qunbiao, et al. Phosphorus uptaking behavior of phosphorus accumulating organisms in reversed AAO Process. China Environmental Science, 2007, 27(1): 49-53(in Chinese)
[4]	Mulkerrins D., Dobson A. D. W., Colleran E. Parameters affecting biological phosphate removal from wastewaters. Environment International, 2004, 30(2): 120-125
[5]	郑燕清, 周建华. 除磷工艺中厌氧释磷和好氧吸磷的影响因素. 中国市政工程, 2007, (1): 48-50 Zheng Yanqing, Zhou Jianhua. On influence factors of phosphorus release and uptake under aerobic and anaerobic conditions. China Municipal Engineering, 2007, (1): 48-50(in Chinese)
[6]	侯红勋, 王淑莹, 闫骏, 等. 不同碳源类型对生物除磷过程释放磷的影响. 化工学报, 2007, 58(8):2081-2086 Hou Hongxun, Wang Shuying, Yan Jun, et al. Effect of different types carbon sources on phosphorus release in enhanced biological phosphorus removal process. Journal of Chemical Industry and Engineering (China), 2007, 58(8): 2081-2086(in Chinese)
[7]	娄金生, 谢水波, 何少华, 等. 生物脱氮除磷原理与应用. 长沙: 国防科技大学出版社, 2002
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倒置A2/O与常规A2/O工艺除磷效果对比

1. 西安建筑科技大学环境与市政工程学院, 西安 710055
2. 西安市污水处理有限责任公司, 西安 710000

收稿日期: 2014-04-16

基金项目:

陕西省科技统筹创新工程(2011KTZB03-03-03)

国家"水体污染控制与治理"科技重大专项(2011ZX07302-001)

陕西省创新团队项目(IRT 2013KCT-13)

新世纪优秀人才项目(NCET-12-1043)

西安市科技计划项目(CX12160)

关键词:

摘要: 通过对西安市某污水处理厂倒置A2/O工艺的沿程监测和工艺解析,分析明确了该工艺生物除磷效果差的影响因素。研究表明,缺氧池反硝化不完全,厌氧池高浓度硝酸盐是抑制聚磷菌释磷的重要因素。当厌氧池内硝酸盐浓度大于4 mg/L时会明显抑制生物除磷效果。硝酸盐的浓度在1~4 mg/L时,随着硝酸盐浓度的升高,释磷效果显著降低。为避免硝酸盐对聚磷菌的影响,需将厌氧池硝酸盐浓度控制在1 mg/L以下。硝酸盐对聚磷菌释磷的影响原因是生物脱氮除磷对碳源的竞争,以乙酸钠和原污水为碳源分析硝氮盐对释磷效果的影响。结果表明,易于生物降解的优质碳源更有利于聚磷菌在厌氧环境下释磷,倒置A2/O的前置式缺氧池首先将大量优质碳源用于反硝化,而造成后续厌氧池聚磷菌释磷效果差。针对这一研究结果,对该污水厂提出将倒置A2/O调整为常规A2/O的改造方案,改造后厌氧池硝酸盐浓度由3.57 mg/L降低至0.89 mg/L,聚磷菌释磷量提高1.8倍,系统除磷效果增强,出水总磷降低至0.66 mg/L,与倒置A2/O相比降低0.21 mg/L。

English Abstract

Comparison of phosphorus removal efficiency between reversed and conventional A2/O processes

1. School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
2. Xi'an Wastewater Treatment Ltd., Xi'an 710000, China

Received Date: 2014-04-16

Fund Project:

Keywords:

Abstract: Through the monitoring and analysis on the whole reversed A2/O process in a sewage treatment plant in Xi'an, the adverse factors for poor phosphorus removal were ascertained. The study shows that the denitrification is incomplete in the anoxic tank so that lots of nitrate flows into the anaerobic tank and inhibits phosphorus release, which leads to the poor phosphorus removal. The phosphorus release was inhibited gradually with the increase of nitrate when the nitrate concentration was between 1 mg/L and 4 mg/L. When nitrate concentration was above 4 mg/L, phosphorus release was inhibited significantly. In order to avoid the adverse effect of nitrate on phosphorus accumulating bacteria for phosphorus release, nitrate concentration in the anaerobic tank should be below 1 mg/L. The adverse effect of nitrate on phosphorus accumulating bacteria indicates that carbon source is required for phosphorus release. Therefore, the effect of nitrate on phosphorus release was studied by using sodium acetate and raw water as carbon source sampled from the wastewater treatment plant. The study shows that the easily biodegradable organic matter was more beneficial for phosphorus release in anaerobic tank. Because of the anoxic tank set as the first step in reversed A2/O process, a large amount of easily biodegradable organic matter is consumed first for denitrification in the anoxic tank, which lead to the poor effect of phosphorus release in anaerobic tank due to lack of easily biodegradable organic matter. In response to this study, a reconstruction scheme that the reversed A2/O process shall be adjusted to a conventional A2/O process was put forward. After the reconstruction project, the concentration of nitrate in anaerobic tank decreases from a previous one of 3.57 mg/L to the current one of 0.89 mg/L with the amount of phosphorus release increased by 1.8 times. The total phosphorus in the effluent is 0.66 mg/L which is 0.21 mg/L lower than that of the reversed A2/O process.

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倒置A2/O与常规A2/O工艺除磷效果对比

Comparison of phosphorus removal efficiency between reversed and conventional A2/O processes

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倒置A2/O与常规A2/O工艺除磷效果对比

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Comparison of phosphorus removal efficiency between reversed and conventional A2/O processes

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