Optimal Evaluation of Coag-Flocculation Factors for Alum-Brewery Effluent System by Response Surface Methodology

This work investigates coag-flocculation optimization treatment of alum-brewery effluent system
via response surface methodology (RSM). To minimize suspended and dissolved particles (SDP),
experiments were carried out using nephelometric jar test and 23-factorial design with three
star-points, six-center-points and two replications. A central composite design, which is the
standard design of RSM, was used to evaluate the effects and interactions of three major factors
(coagulation pH, coagulant dosage, settling time) on the treatment efficiency. Multivariable
quadratic model developed for the response studied indicates the optimum conditions to be 9,
500mg/l and 20minutes for coagulation pH, coagulant dosage and settling time, respectively. At
optimum, the SDP was reduced from 10831.490mg/l to 801.451mg/l, representing 92.601%
removal efficiency. RSM has demonstrated to be appropriate approach for the optimization of
the coag-flocculation process by statistical evaluaThis work investigates coag-flocculation optimization treatment of alum-brewery effluent system
via response surface methodology (RSM). To minimize suspended and dissolved particles (SDP),
experiments were carried out using nephelometric jar test and 23-factorial design with three
star-points, six-center-points and two replications. A central composite design, which is the
standard design of RSM, was used to evaluate the effects and interactions of three major factors
(coagulation pH, coagulant dosage, settling time) on the treatment efficiency. Multivariable
quadratic model developed for the response studied indicates the optimum conditions to be 9,
500mg/l and 20minutes for coagulation pH, coagulant dosage and settling time, respectively. At
optimum, the SDP was reduced from 10831.490mg/l to 801.451mg/l, representing 92.601%
removal efficiency. RSM has demonstrated to be appropriate approach for the optimization of
the coag-flocculation process by statistical evaluationtion.