• Vol 7, No 5 (2016)
  • Chemical Engineering

The Combination of Air Flotation and a Membrane Bioreactor for the Treatment of Palm Oil Mill Effluent

Muhammad Faisal, Izarul Machdar, Asri Gani, Hiroyuki Daimon


Publish at : 29 Jul 2016 - 00:00
IJtech : IJtech Vol 7, No 5 (2016)
DOI : https://doi.org/10.14716/ijtech.v7i5.3163

Cite this article as:
Faisal, M., Machdar, I.., Gani, A.., Daimon, H.., 2016. The Combination of Air Flotation and a Membrane Bioreactor for the Treatment of Palm Oil Mill Effluent. International Journal of Technology. Volume 7(5), pp.767-777
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Muhammad Faisal Department of Chemical Engineering, Syiah Kuala University, Banda Aceh, Aceh 23111, Indonesia
Izarul Machdar Department of Chemical Engineering, Syiah Kuala University, Banda Aceh, Aceh 23111, Indonesia
Asri Gani Department of Chemical Engineering, Syiah Kuala University, Banda Aceh, Aceh 23111, Indonesia
Hiroyuki Daimon Department of Environmental and Life Science, Toyohashi University of Technology, Toyohashi 441-8580, Japan
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Abstract

The combination of baffled air flotation and a membrane system for the treatment of palm oil mill effluent (POME) was studied. The POME was obtained from a palm oil factory in PTPN I Tanjong Seumantoh, Aceh, Indonesia. Operation variables and conditions, such as the hydraulic retention time and air flow rates, were varied to find the optimum process. The air flotation process is able to reduce the concentration of suspended solids and fats/ oils contained in the wastewater, which increases the performance of the membrane by reducing clogging. The results showed that this method was promising for POME treatment. The optimum organic removal efficiency of the air flotation pretreatment was obtained at HRT = 5 days and at an air flow rate of 11 L/min. The effluent was subsequently passed through an anaerobic membrane system to achieve the highest removal efficiency treatment. The removal efficiency of chemical oxygen demand (COD), total suspended solids (TSS), turbidity, mixed liquor suspended solids (MLSS), mixed liquor volatile suspended solids (MLVSS), and fats/oils after passing through the membrane system were 97%, 93.9%, 99.8%, 94.5%, 96.2%, and 99.9%, respectively. The results also showed that the pH could be neutralized to 6.18, while a dissolved oxygen (DO) level of 1.60 mg/L could be achieved. A high quality of effluent was obtained, which met the standards for POME effluent.


Air flotation; COD; Membrane; POME; Removal efficiency; Wastewater