Permeation enhancement and evaluation of ultrafiltration membranes for oily wastewater treatment

Publish Year: 1395
نوع سند: مقاله کنفرانسی
زبان: English
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CHCONF02_272

تاریخ نمایه سازی: 9 مرداد 1395

Abstract:

Separation of oily wastewater of API unit in Tehran refinery was carried out using cross-flow ultrafiltration (UF). Two types of hydrophilic membranes; polysulfone (PS, 30kDa) and polyacrylonitrile (PAN, 20kDa) were employed in all the experiments. Performance of both membranes in wastewater treatment was compared. The PAN membrane showed higher rejection, permeate flux and porosity of cake layer than the PS membrane. Analysis of the UF process showed 99.7%, 77.2%, 63.3%, 65.4%, 29.8%, 100% and 99.5% reductions of oil and grease content, TOC, COD, BOD5, TDS, TSS and turbidity, respectively. A major important problem in the application of UF process technology for treatment of oily wastewater is membrane fouling. Therefore, effect of N2 injection on elimination of fouling on membrane surface in the lab scale was investigated. The result shows that, N2 injection was effective method for removal and increasing permeation flux. In this work, the fouling mechanism on the membrane surface and/or into its porous structure was analyzed. It was seen that an initial intense flux decline due to external blockage followed by an internal deposition or the formation of a cake. It was found that porosity decreased and specific cake resistance increased with the increase in the time.

Authors

Fatemeh Rekabdar

Polymer Science and Technology Division, Research Institute of Petroleum Industry (RIPI), West Blvd., Near Azadi Sports Complex, Tehran, Iran

Abdolhamid Salahi

Polymer Science and Technology Division, Research Institute of Petroleum Industry (RIPI), West Blvd., Near Azadi Sports Complex, Tehran, Iran

Ghader Khanbabayee

Polymer Science and Technology Division, Research Institute of Petroleum Industry (RIPI), West Blvd., Near Azadi Sports Complex, Tehran, Iran

Maryam Tavakolmoghadam

Polymer Science and Technology Division, Research Institute of Petroleum Industry (RIPI), West Blvd., Near Azadi Sports Complex, Tehran, Iran

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