Evaluation of hybrid membrane bioreactor (MBR) for palm oil mill effluent (POME) treatment

Ahmad, Zulkifli and Ujang, Z. and Olsson, G. and Abdul Latiff, Ab Aziz (2011) Evaluation of hybrid membrane bioreactor (MBR) for palm oil mill effluent (POME) treatment. International Journal of Integrated Engineering, 1 (2). pp. 17-25. ISSN 1985-854X

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Official URL: http://penerbit.uthm.edu.my/ejournal/

Abstract

The pollution load of palm oil mill effluent (POME) is in the range of 50,000 mg COD/L. With more than 500 palm oil mills, Malaysia produces some 13.9 million tonnes of crude palm oil annually and generates around 35 x 106 m3 POME. Typically, raw POME is difficult to degrade because it contains significant amounts of oil (tryacylglycerols) and degradative products such as di-and monoacylglycerols and fatty acids. The fatty acids composition (C12 – C20) of each of this fraction are different from one another and contribute to the high value of pollution load in POME. Thus POME has to be treated, usually in a series of anaerobic and aerobic treatment steps, for the organic matter to be degraded before the effluent is allowed to be discharged into public waterways. The objective of this study was to observe the performance of a hybrid membrane bioreactor (MBR) for POME. The raw POME was introduced into sequencing processes of anaerobic, anoxic and aerobic in order to achieve biological nutrient removal and the membrane modules were submerged into the aerobic zone. The critical flux of MBR using the flux-step method based on transmembrane pressure (TMP) was conducted as well as flux and permeability studies for assessing fouling in a membrane bioreactor operating at constant flux. The reactor was operated at a mixed liquor suspended solid (MLSS) concentration of 4000 to 8000 mg/l. The removal efficiency of COD, SS, TN and TP achieved were 94%, 98%, 83% and 64% respectively. The hybrid MBR was found to be able to degrade POME significantly and high quality effluent could be reused for various other applications.

Item Type:Article
Uncontrolled Keywords:flux; hybrid MBR; permeability; POME; TMP
Subjects:T Technology > TD Environmental technology. Sanitary engineering > TD194-196 Environmental effects of industries and plants. Special environmental pollutants
Divisions:Faculty of Civil and Environmental Engineering > Department of Water and Environment Engineering
ID Code:490
Deposited By:Nurhafiza Hamzah
Deposited On:30 Nov 2011 11:06
Last Modified:30 Nov 2011 11:06

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