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Filtering Surface Water with a Polyurethane-based Hollow Fiber Membrane：Effects of Operating Pressure on Membrane Fouling

ISSN号：1004-9541
期刊名称：《中国化学工程学报：英文版》
时间：0
分类：TQ028.8[化学工程] TQ323.8[化学工程—合成树脂塑料工业]
作者机构：[1]KeyLaboratoryofHollowFiberMembraneMaterialsandMembraneProcess,MinistryofEducation,TianjinPolytechnicUniversity,Tianjin300387,China
相关基金：Supported by the National Natural Science Foundation of China （51078264, 51108314, 51108315, 51138008）.

作者：赵学辉, 张宏伟, 王捷

关键词：中空纤维膜, 工作压力, 聚氨酯, 污染影响, 过滤, 地表水, 实验室规模, 操作压力, membrane fouling, surface water treatment, pressure responsibility

中文摘要：

膜犯规严重限制膜技术的应用。新奇策略在这研究被使用延迟由与压力责任膜改变操作压力犯规的膜。基于聚氨酯的空纤维膜被用来为评估在膜犯规上操作压力的效果对待表面水。尽头的模式的一些凳子规模测试被执行。在没有 backwashing 的实验，当操作压力增加了，当 permeate 质量显然被改进时，严重的膜犯规发生在膜表面上，它被认为由于收缩变丑。在不同以橹反推的水压力下面的全部的抵抗，不可逆的抵抗和可逆抵抗在过滤 / 以橹反推的水测试被决定。随以橹反推的水压力的增加，全部的抵抗减少了，并且更重要地，不可逆的抵抗也减少了它暗示小粒子在内在膜表面上扔了膜毛孔和蛋糕层有效地被移开。类似的结果能在集体平衡测试被获得。现在的学习的结果显示在表面水处理的压力责任膜的申请可以是为减少膜犯规的有效策略。

英文摘要：

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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