Volume No. 7 Issue No.: 2 Page No.: 738-745 Oct. - Dec. 2012

 

CHARACTERIZATION OF BIOMASS IN UPFLOW ANAEROBIC FILTERS IN TREATMENT OF PALM OIL MILL EFFLUENT

 

Mustapha S.*, Ashhuby B. and Abidin Z. Z.

Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Selangor (MALAYSIA)

 

Received on : July 10, 2012

 

ABSTRACT

 

Microbial granulation in mesophilic (MAF) and thermophilic (TAF) upflow anaerobic filters during treatment of palm oil mill effluent was examined at lab scale. Both filters were operated in parallel for a period of 210 days at organic loading rate varied from 1.0 to 13.5 kg COD m-3d-1. The biomass distribution profiles, specific methanogenic activity and the composition of the occluded biomass in both reactors were recorded during start-up, steady state and shock loading stages. Microbial granulation had initiated within the 7th (MAF) and 10th (TAF) week and had matured within 3 and 3.5 months in MAF and TAF, respectively. Thermophilic microbial granules exhibited better settleability, even during shock loading experiment and had more uniform shapes.

 

Keywords : Mesophilic, Thermophilic, Upflow anaerobic filter, Biomass granulation, Palm oil mill effluent

 

 

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