| Filtering surface water with a polyurethane-based hollow fiber membrane: effects of operating pressure on membrane fouling |
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| 引用本文： | 赵学辉,张宏伟,王捷. Filtering surface water with a polyurethane-based hollow fiber membrane: effects of operating pressure on membrane fouling[J]. 中国化学工程学报, 2014, 22(5): 583-589. DOI: 10.1016/S1004-9541(14)60098-7 |
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| 作者姓名： | 赵学辉 张宏伟 王捷 |
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| 作者单位： | Key Laboratory of Hollow Fiber Membrane Materials and Membrane Process, Ministry of Education, Tianjin Polytechnic University, Tianjin 300387, China |
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| 基金项目： | Supported by the National Natural Science Foundation of China （51078264, 51108314, 51108315, 51138008）. |
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| 摘 要： | Membrane fouling seriously restricts applications of membrane technology. A novel strategy was ap-plied in this study to retard membrane fouling by changing operating pressure with the pressure responsibility membrane. A polyurethane-based hollow fiber membrane was used to treat surface water for evaluating the effect of operating pressure on membrane fouling. Some bench-scale tests in dead-end mode were carried out. In the experi-ments without backwashing, as operating pressure increased, severe membrane fouling occurred on membrane sur-face, while the permeate quality was improved obviously, which is considered to be due to shrinkage deformation. The total resistance, irreversible resistance and reversible resistance under different backwash pressures were de-termined in filtration/backwashing test. With the increase of backwash pressure, the total resistance decreased, and more importantly, the irreversible resistance also decreased, which implies that small particles deposited inside membrane pores and cake layers on membrane surface are effectively removed. Similar results could be obtained in mass balance tests. The results of the present study indicate that the application of pressure responsibility membrane in surface water treatment may be an effective strategy for reducing membrane fouling.
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| 关 键 词： | membrane fouling surface water treatment pressure responsibility |
| 收稿时间： | 2013-03-18 |
Filtering Surface Water with a Polyurethane-based Hollow Fiber Membrane：Effects of Operating Pressure on Membrane Fouling |
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| ZHAO Xuehui,ZHANG Hongwei,WANG Jie. Filtering Surface Water with a Polyurethane-based Hollow Fiber Membrane：Effects of Operating Pressure on Membrane Fouling[J]. Chinese Journal of Chemical Engineering, 2014, 22(5): 583-589. DOI: 10.1016/S1004-9541(14)60098-7 |
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| Authors: | ZHAO Xuehui ZHANG Hongwei WANG Jie |
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| Affiliation: | Key Laboratory of Hollow Fiber Membrane Materials and Membrane Process, Ministry of Education, Tianjin Polytechnic University, Tianjin 300387, China |
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| Abstract: | Membrane fouling seriously restricts applications of membrane technology. A novel strategy was applied in this study to retard membrane fouling by changing operating pressure with the pressure responsibility membrane. A polyurethane-based hollow fiber membrane was used to treat surface water for evaluating the effect of operating pressure on membrane fouling. Some bench-scale tests in dead-end mode were carried out. In the experiments without backwashing, as operating pressure increased, severe membrane fouling occurred on membrane surface, while the permeate quality was improved obviously, which is considered to be due to shrinkage deformation. The total resistance, irreversible resistance and reversible resistance under different backwash pressures were determined in filtration/backwashing test. With the increase of backwash pressure, the total resistance decreased, and more importantly, the irreversible resistance also decreased, which implies that small particles deposited inside membrane pores and cake layers on membrane surface are effectively removed. Similar results could be obtained in mass balance tests. The results of the present study indicate that the application of pressure responsibility membrane in surface water treatment may be an effective strategy for reducing membrane fouling. |
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| Keywords: | membrane fouling surface water treatment pressure responsibility |
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