Volume No. 6 Issue No.: 1 Page No.: 99-110 July-Sept 2011

 

OPTIMISATION OF PHYSICAL PARAMETERS OF COAGULATION-FLOCCULATION PROCESS IN WATER TREATMENT

 

Milind R. Gidde* and Anand R. Bhalerao

Department of Civil Engineering, Bharati Vidyapeeth Deemed University College of Engineering, Dhanakawadi, Pune (INDIA)

 

Received on : May 06, 2011

 

ABSTRACT

 

Moringa oleifera is a plant coagulant, which has a potential for use on a large-scale, for treatment of turbid waters in developing countries. In this study, the results of laboratory based investigations into the effects of various forms of Moringa oleifera coagulant on its coagulation effectiveness using low, medium and high turbidity water samples are presented. The paper presents results of optimisation studies on coagulant dose, container geometry/ jar configuration, Rapid Mix Velocity Gradient (RMVG), and Slow Mix Velocity Gradient (SMVG) by using various forms of M.O. coagulant on low, medium and high turbidity water suspensions. In this study, Bentonite clay and Kaolin clay suspensions were used. It was observed that optimum dose of coagulant varies with the form of coagulant, type of jar and type of turbidity suspension. The circular baffle showed better performance in turbidity removal.

 

Keywords : Moringa oleifera, Coagulant, Rapid mix, Slow mix, Velocity gradient, Optimisation

 

 

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