Title: Optimisation of coagulation (poly iron chloride) process for partially stabilised leachate using response surface methodology

Authors: Nur Shaylinda Mohd Zin; Hamidi Abdul Aziz; Mohd Nordin Adlan; Azlan Ariffin; Irvan Dahlan

Addresses: Micro Pollutant Research Center, Faculty of Civil and Environmental Engineering, Universiti Tun Hussein Onn Malaysia, 86400 Parit Raja Batu Pahat, Johor, Malaysia ' School of Civil Engineering and Solid Waste Management Cluster, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia ' School of Civil Engineering and Solid Waste Management Cluster, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia ' School of Material and Resources Engineering, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia ' School of Chemical Engineering, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia

Abstract: A coagulation and flocculation treatment method was applied on partially stabilised leachate of Matang landfill. The interactions and effects of dose and pH on the removal of suspended solid (SS), colour and chemical oxygen demand (COD) were investigated, analysed and optimised through RSM. The optimal condition obtained from the satisfactory mathematical model was 0.24 g/L Fe and 4.94 of poly iron chloride (PHI) dose and pH, respectively. Confirmatory experiment indicates good agreement between model prediction and experimental value. Therefore, RSM is an appropriate statistical tool in the optimisation of PHI coagulation and flocculation process.

Keywords: prehydrolysed coagulant; prepolymerised coagulant; leachate.

DOI: 10.1504/IJEE.2017.087999

International Journal of Environmental Engineering, 2017 Vol.9 No.1, pp.40 - 51

Received: 30 Mar 2017
Accepted: 13 Aug 2017
Published online: 13 Nov 2017 *

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