DocumentCode
1988257
Title
Notice of Retraction
Optimization of coagulation-flocculation conditions for the treatment of combined sewer overflow wastewater
Author
Zuxin Xu ; Weigang Wang ; Li Xu ; Huaizheng Li ; Wei Jin
Author_Institution
Coll. of Environ. Sci. & Eng., Tongji Univ., Shanghai, China
Volume
2
fYear
2010
fDate
17-18 July 2010
Firstpage
430
Lastpage
433
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.
The coagulation-flocculation process was used at laboratory bench scale for the removal of chemical oxygen demand (COD), and Turbidity in CSO wastewater. Aluminium Sulphate, Ferric chloride, Polyaluminium Chloride (PAC) and Polyferric sulfate (PFS) were employed in the coagulation flocculation process. Polyaluminium Chloride (PAC) proved most effective on the removal efficiency of COD and Turbidity, comparing the four coagulants employed in this work. The removal efficiency of the COD and Turbidity from CSO wastewater increased at first and decreased at certain dosage of PAC. The optimum dosage is 100, 200mg/L respectively. Taguchi method was employed to optimize the mixing and settling conditions. The optimum process conditions for the treatment of CSO wastewater were chosen as Rapid mixing speed=250rpm, Rapid mixing time =1min, slow mixing speed =50rpm, slow mixing time =20min, Settling time=20min.
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.
The coagulation-flocculation process was used at laboratory bench scale for the removal of chemical oxygen demand (COD), and Turbidity in CSO wastewater. Aluminium Sulphate, Ferric chloride, Polyaluminium Chloride (PAC) and Polyferric sulfate (PFS) were employed in the coagulation flocculation process. Polyaluminium Chloride (PAC) proved most effective on the removal efficiency of COD and Turbidity, comparing the four coagulants employed in this work. The removal efficiency of the COD and Turbidity from CSO wastewater increased at first and decreased at certain dosage of PAC. The optimum dosage is 100, 200mg/L respectively. Taguchi method was employed to optimize the mixing and settling conditions. The optimum process conditions for the treatment of CSO wastewater were chosen as Rapid mixing speed=250rpm, Rapid mixing time =1min, slow mixing speed =50rpm, slow mixing time =20min, Settling time=20min.
Keywords
Taguchi methods; coagulation; flocculation; mixing; optimisation; sewage treatment; turbidity; wastewater treatment; CSO wastewater; Taguchi method; aluminium sulphate; chemical oxygen demand; coagulants; coagulation-flocculation conditions; combined sewer overflow wastewater treatment; ferric chloride; laboratory bench scale; mixing; optimization; optimum process conditions; polyaluminium chloride; polyferric sulfate; turbidity; Analysis of variance; Chemicals; Coagulation; Tin; Wastewater; CSO; Taguchi method; coagulation-flocuulation process; optimization;
fLanguage
English
Publisher
ieee
Conference_Titel
Environmental Science and Information Application Technology (ESIAT), 2010 International Conference on
Conference_Location
Wuhan
Print_ISBN
978-1-4244-7387-8
Type
conf
DOI
10.1109/ESIAT.2010.5567333
Filename
5567333
Link To Document