Journal of Separation Science and Engineering

Vol. 3 , No. 1 , pp. 71-69

Jafar.moghaddas@sut.ac.ir

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Treatment of Oil Polluted Industrial Wastewater in a Sequence Batch Membrane Bioreactor

S. Abdollahi1, J.S. Moghaddas2, D. Mowla3

1- M.Sc. of Chemical Engineering, Sahand University of Technology. 2- Associate Professor of Transport Phenomena Research Centre, Chemical Engineering Faculty,

Sahand University of Technology. 3- Professor of Chemical Engineering, Shiraz University.

A R T I C L E I N F O A B S T R A C T

Article history:

Received 8 September 2010 Received in revised form 13 Feb. 2011 Accepted 12 June 2011

Membrane bioreactor (MBR) is a combination of one bioreactor system and one membrane system. Membrane bioreactors (MBR) have been widely used in wastewater treatment that requires high effluent quality, due to their important advantages over traditional technologies. In this research, the microorganisms with the ability to withstand in an environment with high salinity and oil were isolated from heavy crude oil in the south of Iran and biodegradation of oil pollutants studied. The adapted bacteria were cultivated later in the feed tank of a submerged hollow fiber MBR and biodegradation of oil polluted industrial wastewater with COD concentration of (700-3000mg/l) and MLSS concentration (4200 14000mg/l) have been studied.

The obtained results suggested that the existing membrane bioreactor have high performance in crude oil contaminated wastewater treatment, considering its microorganisms, environmental conditions (pH=6.7-8), temperature (28-30°C), high salinity (close to sea s level) and removal efficiency (80-93%).

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Key words:

Membrane Bioreactor microorganism oily pollutants high salinity

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