Polyacrylamide-induced coagulation process removing suspended solids from palm oil mill effluent

Zinatizadeh, A.A. and Ibrahim, S. and Aghamohammadi, N. and Mohamed, A.R. and Zangeneh, H. and Mohammadi, P. (2017) Polyacrylamide-induced coagulation process removing suspended solids from palm oil mill effluent. Separation Science and Technology, 52 (3). pp. 520-527. ISSN 0149-6395, DOI https://doi.org/10.1080/01496395.2016.1260589.

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Official URL: http://dx.doi.org/10.1080/01496395.2016.1260589


Palm oil mill effluent (POME) is a colloidal suspension with 2–4% suspended solids. About 50% of the suspended solids are cellulosic compounds, which are not degraded in the typical biological treatment systems. Chemical (polymer-induced coagulation) and physical (settling) pretreatment methods were examined to remove the suspended solids in this study. A novel physicochemical treatment with high water recovery and sludge compressibility including three cationic polyacrylamides (C-PAM; as coagulant) and three anionic polyacrylamides (A-PAM; as flocculant) with different molecular weights and charge densities was used. The coagulants used were biodegradable. The combination of a C-PAM (Chemfloc1515C) with medium molecular weight and charge density and an A-PAM (Chemfloc 430A) with high molecular weight and charge density at doses of 300 and 50 mg/dm3 showed the best total suspended solids (TSS) and chemical oxygen demand (COD) removal (96.4 and 70.9%, respectively). The optimal condition was found at pH 5, rapid mixing at 150 rpm for 1 min, and slow mixing at 40 rpm for 30 s. As a conclusion, the physiochemical pretreatment using biodegradable coagulants was a promising alternative to effectively separate TSS (96.4%) with high water recovery (76%).

Item Type: Article
Funders: Universiti Sains Malaysia (USM), University of Malaya (UM)
Uncontrolled Keywords: Coagulation and flocculation; Polyacrylamide; Palm oil mill effluent; Volatile suspended solids
Subjects: Q Science > Q Science (General)
T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 06 Jun 2018 04:02
Last Modified: 22 Feb 2019 08:19
URI: http://eprints.um.edu.my/id/eprint/18807

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