Optimization of process parameters for COD removal by Coagulation Treatment using Box?Behnken design

摘要

Coagulation treatment of sago wastewater was studied and laboratory studies were carried out using alum as coagulant. Coagulation treatment conditions were optimised through response surface methodology (RSM). Operational parameters namely dosage of alum (Al2 (SO4)3) (mg/l), pH and wastewater concentration (g/l) were varied between 50-150mg/l, 3?5 and 10-30g/l respectively. The results were analysed using Pareto analysis of variance (ANOVA). Optimum condition at 100mg/l of alum dosage, 4.5 pH and 23.5 g/l concentration, COD removal efficiency was found to be 67.86%. These results reveal the applicability of coagulation treatment to the sago wastewater as an alternative approach.