Techno Press

Advances in Environmental Research   Volume 7, Number 1, March 2018, pages 1-11
Selection of coagulant using jar test and analytic hierarchy process: A case study of Mazandaran textile wastewater
Gholamreza Asadollahfardi, Hossein Zangooei, Vahid Motamedi and Mostafa Davoodi

Abstract     [Full Text]
    Textile factories are one of the industries which its wastewater treatment is a challenging issue, especially in developing countries and a conventional treatment cannot treat all its pollutants properly. Using chemical coagulants is a technique for physical and chemical primary treatment of the wastewater. We applied jar test for selection of suitable coagulant among the five coagulants including alum, calcium hydroxide, ferrous sulfate, ferrous chloride and barium chloride for the effluent of wastewater in Mazandran textile factory located in Mazandran Province, Iran. In addition, jar test, we also used analytic hierarchy process (AHP) method considering criteria which included coagulation cost, sensitivity to pH change, the amount of sludge generation and side effects for coagulation. The results of the jar test indicated that calcium hydroxide was proper among the coagulants which it removed 92.9% total suspended solid (TSS), 70%dye and30% chemical oxygen demand. The AHP analysis presented that calcium hydroxide is more suitable than other coagulants considering five criteria.
Key Words
    Mazandran textile factory; jar test; analytic hierarchy process (AHP)
Gholamreza Asadollahfardi, Hossein Zangooeiand Mostafa Davoodi:Department of Civil Engineering, Kharazmi University, Tehran, Iran

Vahid Motamedi:Department of Educational Technology, Kharazmi University, Tehran, Iran

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