回流污泥预浓缩强化新型氧化沟系统生物除磷的研究

Chinese Journal of Chemical Engineering ›› 2012, Vol. 20 ›› Issue (4): 747-753.

• 能源、资源与环境技术 • 上一篇下一篇

回流污泥预浓缩强化新型氧化沟系统生物除磷的研究

刘巍¹; 杨殿海¹; 徐立¹; 贾川¹; 卢文建¹; BOSIRE O.I.²; 沈昌明¹

¹State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Sciences and Engi-neering, Tongji University, Shanghai 200092, China ² UNEP-TONGJI Institute of Environment for Sustainable Development, College of Environmental Sciences and Engineering, Tongji University, 200092 Shanghai, China

收稿日期:2011-03-08 修回日期:2011-09-15 出版日期:2012-08-28 发布日期:2011-09-15

Effect of return sludge pre-concentration on biological phosphorus removal in a novel oxidation ditch

LIU Wei¹; YANG Dianhai¹; XU Li¹; JIA Chuan¹; LU Wenjian¹; BOSIRE O.I.²; SHEN Changming¹

Received:2011-03-08 Revised:2011-09-15 Online:2012-08-28 Published:2011-09-15

摘要/Abstract

摘要： A pilot-scale, pre-anoxic-anaerobic oxidation ditch was used in this study to treat municipal wastewater with limited carbon source. A novel return activated sludge (RAS) pre-concentration tank was adopted for improving the phosphorus removal efficiency and the effects of RAS pre-concentration ratio were studied. Under the optimal operational condition, the suspended total phosphorus (STP) and the total phosphorus (TP) removal efficiencies were around 58.9% and 63.9% respectively and the effluent -P was lower than 0.8 mg•L?1. The reason is that with the optimal RAS pre-concentration ratio, nitrate is completely removed with endogenous carbon source and the secondary phosphorus release is strictly restrained in the pre-anoxic tank. Therefore, the anaerobic phosphorus release and the carbon source uptake by phosphorus accumulation organisms (PAOs) in the sludge, which are ex-tremely important to the phosphorus removal process, can be fully satisfied. Furthermore, the oxidation-reduction potential is proved to be suitable for controlling the RAS pre-concentration ratio due to influent fluctuation and varied conditions. The novel modified system is also beneficial for PAO accumulation.

关键词: denitrifying phosphorus removal, nitrate, oxidation ditch, phosphorus, return activated sludge pre-concentration, secondary phosphorus release

Abstract: A pilot-scale, pre-anoxic-anaerobic oxidation ditch was used in this study to treat municipal wastewater with limited carbon source. A novel return activated sludge (RAS) pre-concentration tank was adopted for improving the phosphorus removal efficiency and the effects of RAS pre-concentration ratio were studied. Under the optimal operational condition, the suspended total phosphorus (STP) and the total phosphorus (TP) removal efficiencies were around 58.9% and 63.9% respectively and the effluent -P was lower than 0.8 mg•L?1. The reason is that with the optimal RAS pre-concentration ratio, nitrate is completely removed with endogenous carbon source and the secondary phosphorus release is strictly restrained in the pre-anoxic tank. Therefore, the anaerobic phosphorus release and the carbon source uptake by phosphorus accumulation organisms (PAOs) in the sludge, which are ex-tremely important to the phosphorus removal process, can be fully satisfied. Furthermore, the oxidation-reduction potential is proved to be suitable for controlling the RAS pre-concentration ratio due to influent fluctuation and varied conditions. The novel modified system is also beneficial for PAO accumulation.

Key words: denitrifying phosphorus removal, nitrate, oxidation ditch, phosphorus, return activated sludge pre-concentration, secondary phosphorus release

刘巍, 杨殿海, 徐立, 贾川, 卢文建, BOSIRE O.I., 沈昌明. 回流污泥预浓缩强化新型氧化沟系统生物除磷的研究[J]. Chinese Journal of Chemical Engineering, 2012, 20(4): 747-753.

LIU Wei, YANG Dianhai, XU Li, JIA Chuan, LU Wenjian, BOSIRE O.I., 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.

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回流污泥预浓缩强化新型氧化沟系统生物除磷的研究

Effect of return sludge pre-concentration on biological phosphorus removal in a novel oxidation ditch

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