alexa Optimization of the Coagulation-flocculation Process for Wastewater Treatment Using Polymeric Ferric Sulfate (PFS) - Poly-diallyldimethyl Ammonium Chloride (PDADMAC) Composite Coagulant
ISSN: 2157-7587

Hydrology: Current Research
Open Access

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Research Article

Optimization of the Coagulation-flocculation Process for Wastewater Treatment Using Polymeric Ferric Sulfate (PFS) - Poly-diallyldimethyl Ammonium Chloride (PDADMAC) Composite Coagulant

Huaili Zheng*, Tiroyaone Tshukudu and Jun Yang
Key Laboratory of the Three Gorges Reservoir Regions Eco-Environment, Ministry of Education, Chongqing University, China
Corresponding Author : Huaili Zheng
Professor
Key Laboratory of the Three Gorges Reservoir Regions Eco-Environment
Ministry of Education
Chongqing University
Shazhengjie Street, 174
Chongqing 400045, China
Tel: +86-23-65120827
Fax: +86-23-65121769
E-mail: [email protected]
Received June 12, 2012; Accepted August 24, 2012; Published August 27, 2012
Citation: Zheng H, Tshukudu T, Yang J (2012) Optimization of the Coagulationflocculation Process for Wastewater Treatment Using Polymeric Ferric Sulfate (PFS) - Poly-diallyldimethyl Ammonium Chloride (PDADMAC) Composite Coagulant. Hydrol Current Res 3:139. doi: 10.4172/2157-7587.1000139
Copyright: © 2012 Zheng H, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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Abstract

In this study, coagulation-flocculation process was optimized using PFS, PFPD1, PFPD2 and PFPD3. The response surface methodology was used to investigate the effect changes in the level of coagulant dose and coagulation pH have on turbidity and COD removal. In addition, the optimum combination of coagulant dosage and coagulation pH that yields the maximum removal of turbidity, and COD were determined. The results revealed that the optimum conditions for the four coagulants were dosage of 388 mg/L and pH of 7.6 for PFS; dosage of 388 mg/L and pH of 7.45 for PFPD1; dosage of 351 mg/L and pH of 8.0 for PFPD2; dosage of 419 mg/L and pH of 7.64 for PFPD3. The model showed that for turbidity removal, the effectiveness of the coagulants in decreasing order was PFS>PFPD1>PFPD2>PFPD3 while for COD removal, the order was PFPD2>PFPD3>PFS>PFPD1. The verification experiments demonstrated a good agreement between experimental data and model values. Therefore, the RSM approach was appropriate for optimizing the coagulation-flocculation process.

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