Application of a membrane bioreactor for treatment of crude oil contaminated wastewater with high salinity

Publish Year: 1390
نوع سند: مقاله کنفرانسی
زبان: English
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PASAB02_078

تاریخ نمایه سازی: 23 آذر 1390

Abstract:

In the present study, Performance of a membrane bioreactor (MBR) for treatment of crude oil-contaminated wastewater with high salinity in a continuous system was studied. For this purpose, a new microbial consortium of Enterobacter cloacae and Pseudomonas sp. (ERCPPI-2) which was isolated from heavy crude oil-contaminated soil in the south of Iran, has been investigated under extreme environmental conditions. The isolated microorganisms had grown in adequate cultural environment during sequential periods, and their biodegradation rate and feeding effect have evaluated before entering the bioreactor. In the first set of experiments the effects of the main parameters such as temperature (20-70°C), pH (4.0-10.0), salinity (1-12.5% (w/v) of NaCl) and MLSS (4000-10200 mg/l) on the biodegradation rate of crude oil by the consortium ERCPPI-2 were studied. The membrane bioreactor was used to treat the crude oil-contaminated wastewater with COD of 1800 - 2100 mg/l and high salinity (TDS=40000 mg/l). The obtained results showed that the membrane bioreactor has the ability to treat wastewater with high crude oil removal efficiency (94%), low hydraulic retention time, and high MLSS concentration (9000–10200mg/l). These results suggested that the existing membrane bioreactor has high performance in crude oil-contaminated wastewater treatment, considering its microorganisms, environmental conditions (pH=7), temperature range (25-40 °C) and high salinity (close to sea’s level).

Authors

Parviz Darvishi

Department of Chemical Engineering, Yasouj University, Yasouj, Iran

Dariush Mowla

Department of Chemical Engineering, Yasouj University, Yasouj, Iran

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