MODELING AND OPTIMIZATION OF THE RATE OF COAGULANT IN WATER TREATMENT PLANT BY RESPONSE SURFACE METHODOLOGY (RSM)

Abstract

Coagulation is one of the most important steps in water treatment process. The main difficulty is to determine the optimal dose of coagulant injection according to the characteristics of the raw water. A bad control of this process can lead to a significant increase in operating costs and failure to comply with the objectives in term of treated water quality. Aluminum sulfate Al2 (SO4)3,18H2O is the coagulant the most generally used. The determination of the dose of coagulant is done using jar test .Nevertheless; this experience has the disadvantage of having a long time delay and does not allow an automatic control of the process of coagulation. Before modeling the coagulation phenomena, we first conducted a study of screening of all parameters that could influence there.