IIUM Repository

Optimization of flocculation process by microbial coagulant for removal of turbidity in river water

Fatin, Murad and Alam, Md. Zahangir and Salleh, Md. Noor and Mamun, Abdullah Al (2017) Optimization of flocculation process by microbial coagulant for removal of turbidity in river water. IIUM Engineering Journal, 18 (2). pp. 63-70. ISSN 1511-788X E-ISSN 2289-7860

PDF (full paper)
Download (667kB) | Preview
PDF (scopus)
Download (289kB) | Preview


The existing process of coagulation and flocculation is using chemicals that known as the cationic coagulant such as alum, ferric sulfate, calcium oxide, and organic polymers. Thus, this study focuses on optimizing of the flocculation process by microbial coagulant in river water. Turbidity and suspended solids are the main constraints of river water quality in Malaysia since they may reduce the dissolved oxygen in the water and affects the aquatic life. Hence, a study is conducted to produce microbial coagulants isolated locally for river water treatment. The chosen microbe used as the bioflocculant producer is Aspergillus niger. The parameters optimized in the flocculation process were pH, bioflocculant dosage and effluent concentration. The research was done in the jar test process and the process parameters for maximum turbidity removal was validated. The highest flocculating activity was obtained on day seven of cultivation in the supernatant. The optimum pH and bioflocculant dosage for an effective flocculation process were between 4-5 and 2-3 ml for 0.3 g/l of effluent concentration, respectively. The model was validated by using a river water sample from Sungai Pusu (Pusu river) and the result showed that the model was acceptable to evaluate the bioflocculation process.

Item Type: Article (Journal)
Additional Information: 4157/60576
Uncontrolled Keywords: bioflocculant; river water; microbial
Subjects: T Technology > TP Chemical technology > TP155 Chemical engineering
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Engineering > Department of Biotechnology Engineering
Depositing User: Dr. Md. Zahangir Alam
Date Deposited: 28 Dec 2017 20:46
Last Modified: 18 May 2018 12:15
URI: http://irep.iium.edu.my/id/eprint/60576

Actions (login required)

View Item View Item


Downloads per month over past year