Biological municipal wastewater nutrients removal in anaerobic-aerobic (low dissolved oxygen) sequencing batch reactor: effect of organic carbon source addition

Zheng Xiong; Li Hongjing; Tong Juan; Chen Yinguang

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Biological municipal wastewater nutrients removal in anaerobic-aerobic (low dissolved oxygen) sequencing batch reactor: effect of organic carbon source addition

Zheng Xiong #,Li Hongjing,Tong Juan,Chen Yinguang *

State Key Lab of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University

*Correspondence author

#Submitted by

Subject:

Funding: 教育部博士点基金,上海市曙光项目,863项目,重点实验室项目（No.20060247006,05SG26,,08001）

Opened online:16 January 2009

Accepted by: none

Citation: Zheng Xiong,Li Hongjing,Tong Juan.Biological municipal wastewater nutrients removal in anaerobic-aerobic (low dissolved oxygen) sequencing batch reactor: effect of organic carbon source addition[OL]. [16 January 2009] http://en.paper.edu.cn/en_releasepaper/content/27985

The effect of addition of organic carbon sources (acetic acid and waste activated sludge alkaline fermentation liquid) on anaerobic-aerobic (low dissolved oxygen, 0.15-0.45 mg/L) biological municipal wastewater treatment was investigated. The results showed that carbon source addition affected not only the transformations of polyhydroxyalkanoates (PHA), glycogen, nitrogen and phosphorus, but the net removal of nitrogen and phosphorus. The removal efficiencies of TN and TP were respectively 61% and 61% without organic carbon source addition, 81% and 95% with acetic acid addition, and 83% and 97% with waste activated sludge alkaline fermentation liquid addition. It seems that the alkaline fermentation liquid of waste biosolids generated in biological wastewater treatment plant can be used to replace acetic acid as an additional carbon source to improve the anaerobic-aerobic (low dissolved oxygen) municipal wastewater nutrients removal although its use was observed to cause a slight increase of effluent BOD and COD concentrations.

Keywords:Anaerobic-aerobic (low dissolved oxygen); nitrogen and phosphorus removal; municipal wastewater; alkaline fermentation liquid; waste activated sludge

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