Application of a polytetrafluoroethylene (PTFE) flat membrane for the treatment of pre-treated ASP flooding produced water in a Daqing oilfield
| Autor: | Ruijun Zhang, Li Li, Wenxin Shi, Shuili Yu, Youbing Zhu, Bing Zhang |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Pollutant
Suspended solids Fouling Chemistry General Chemical Engineering Membrane fouling 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Pulp and paper industry Produced water Membrane 020401 chemical engineering Wastewater Water quality 0204 chemical engineering 0210 nano-technology |
| Zdroj: | RSC Advances. 6:62411-62419 |
| ISSN: | 2046-2069 |
| DOI: | 10.1039/c6ra12292b |
| Popis: | ASP (alkaline/surfactant/polymer) flooding oilfield wastewater, which is commonly produced in oil extraction processes, contains high organic content, and waste crude oil, water resources and sewage need to be treated prior to re-injection. In this study, pre-treated ASP flooding oilfield water produced in Daqing, China was treated by a PTFE microfiltration membrane and the removal efficiency of the main pollutants in the oilfield-produced water was studied. The content of oil and suspended solids (SS) in the permeate obtained with the membranes was 1.15 mg L−1 and 1.61 mg L−1, respectively, which met the re-injected water quality standards in China. A microscopic analysis of fouling showed that the membrane pollutants were mainly composed of petroleum organic pollutants, and a small amount of SiO2, CaCO3, MgCO3 and other inorganic pollutants was observed. Accordingly the operating conditions of operating flux, back-washing cycle, back-washing flux and gas-washing flux were investigated to decrease membrane fouling. |
| Databáze: | OpenAIRE |
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