DocumentCode
3337229
Title
Notice of Retraction
Evaluation of Nitrogen and Phosphate Removal in Full-Scale Modified A²/O Process
Author
Yang Zhiquan ; Zhou Shaoqi
Author_Institution
Coll. of Environ. Sci. & Eng., South China Univ. of Technol., Guangzhou, China
fYear
2011
fDate
10-12 May 2011
Firstpage
1
Lastpage
4
Abstract
Notice of Retraction
After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.
We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.
The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.
A modified A2/O biological system is applied for the sewage treatment in a full-scale WWTP. Compared with conventional A2/O process, this modified A2/O process adds a pre anaerobic stage, and introduces inflow into pre-anaerobic, anaerobic and anoxic tank simultaneously. These measures bring about a further improvement of nitrogen and phosphorus in urban wastewater. The monitoring results for one year show that the influent concentrations of BOD, NH4-N, TN, TP are 21.9-263.0, 16.3-30.8, 9.7-668 and 1.0-11.3 mg L-l, respectively. After the treatment of modified A2/O process, the average effluent concentrations of BOD, NH4-N, TN, TP are 6.5, 0.6, 10.4, 0.6 mg L-l, and the average removal rates are 93.5%, 96.9%, 61.5% and 78.9%, respectively. The effluent quality meets the 1 B level discharging criteria in China. The operation results show that the modified A2/O process can achieve a high reduction of nitrogen and phosphorus in spite of the fluctuation of influent, and can be widely used in municipal wastewater treatment plants.
After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.
We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.
The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.
A modified A2/O biological system is applied for the sewage treatment in a full-scale WWTP. Compared with conventional A2/O process, this modified A2/O process adds a pre anaerobic stage, and introduces inflow into pre-anaerobic, anaerobic and anoxic tank simultaneously. These measures bring about a further improvement of nitrogen and phosphorus in urban wastewater. The monitoring results for one year show that the influent concentrations of BOD, NH4-N, TN, TP are 21.9-263.0, 16.3-30.8, 9.7-668 and 1.0-11.3 mg L-l, respectively. After the treatment of modified A2/O process, the average effluent concentrations of BOD, NH4-N, TN, TP are 6.5, 0.6, 10.4, 0.6 mg L-l, and the average removal rates are 93.5%, 96.9%, 61.5% and 78.9%, respectively. The effluent quality meets the 1 B level discharging criteria in China. The operation results show that the modified A2/O process can achieve a high reduction of nitrogen and phosphorus in spite of the fluctuation of influent, and can be widely used in municipal wastewater treatment plants.
Keywords
biotechnology; nitrogen; phosphorus compounds; sewage treatment; wastewater treatment; A2/O biological system; A2/O process; NH4-N; anaerobic; anoxic tank; full-scale WWTP; municipal wastewater treatment plants; nitrogen removal; phosphate removal; phosphorus; sewage treatment; urban wastewater; Board of Directors; Effluents; Fluctuations; Microorganisms; Nitrogen; Wastewater;
fLanguage
English
Publisher
ieee
Conference_Titel
Bioinformatics and Biomedical Engineering, (iCBBE) 2011 5th International Conference on
Conference_Location
Wuhan
ISSN
2151-7614
Print_ISBN
978-1-4244-5088-6
Type
conf
DOI
10.1109/icbbe.2011.5781077
Filename
5781077
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