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Performance evaluation of an anaerobic hybrid digester treating palm oil mill effluent

Borja, R., Banks, C.J., Khalfaoui, B. and Martin, A. (1996) Performance evaluation of an anaerobic hybrid digester treating palm oil mill effluent Journal of Environmental Science and Health, Part A. Toxic/Hazardous Substances and Environmental Engineering, 31, (6), pp. 1379-1393. (doi:10.1080/10934529609376430).

Record type: Article


A high-strength palm oil mill effluent was treated using a hybrid anaerobic digester, in which the bottom two-thirds were occupied by a sludge blanket and the upper one-third by submerged PVC rings, under mesophilic conditions. The influent COD concentration varied considerably (11.6-65.0 g/1). The digester was subjected to quantitative increases in organic loading rate (OLR) from 3.3 to 18.6 kg COD/m3 day at a set hydraulic retention time (HRT) of 3.5 days. The data showed that the anaerobic digestion process is feasible for the treatment of, and methane generation from, palm oil mill effluent without pretreatment. A COD removal efficiency and methane yield of 92.3% and 0.335 m3/kg CODremoved, respectively, could be achieved at an OLR of 16.2 kg COD/m3 day. The data also showed that the hybrid digester could be maintained at a HRT of 3.5 days with an OLR of 18.6 kg COD/m3 day. This rate is significantly faster than the rates achieved in previously reported studies. Decreasing digester efficiency was basically characterized by accumulation of propionic acid.

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Published date: July 1996
Additional Information: Borja R, Banks C. J., Khalfaoui B, Martin A, (1996). "Performance evaluation of an anaerobic hybrid digester treating palm oil mill effluent." Journal of Environmental Health Part A- Environmental Science and Engineering and Toxic and Hazardous substance control, 31(6), 1379-1393
Keywords: palm oil mill effluent (pome), anaerobic digestion, hybrid digester, organic loading rate, cod removal efficiency, methane yield


Local EPrints ID: 75507
ISSN: 1093-4529
PURE UUID: b635511d-7648-4876-8e21-4dd14121d386

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Date deposited: 11 Mar 2010
Last modified: 18 Jul 2017 23:43

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Author: R. Borja
Author: C.J. Banks
Author: B. Khalfaoui
Author: A. Martin

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