Effect of Return Sludge Pre-concentration on Biological Phosphorus Removal in a Novel Oxidation Ditch

刘巍; 杨殿海; 徐立; 贾川; 卢文建; BOSIRE Omosa Isaiah; 沈昌明

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Effect of Return Sludge Pre-concentration on Biological Phosphorus Removal in a Novel Oxidation Ditch

Updated：2026-01-06

- Effect of Return Sludge Pre-concentration on Biological Phosphorus Removal in a Novel Oxidation Ditch
- Chinese Journal of Chemical Engineering Vol. 20, Issue 4, Pages: 747-753(2012)
- Affiliations：
  
  1. State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Sciences and Engineering, Tongji University,Shanghai,China,200092
  2. UNEP-TONGJI Institute of Environment for Sustainable Development, College of Environmental Sciences and Engineering, Tongji University,Shanghai,China,200092
- Author bio：
- Funds：
- DOI：
  CLC：
- Published：2012
- Accepted：
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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.
DOI：

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. DOI：

摘要

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 preconcentration 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 PO

-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 extremely 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.

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