循环絮凝对水中SUVA及膜污染的影响

doi:10.3969/j.issn.0438-1157.2014.04.040

化工学报 ›› 2014, Vol. 65 ›› Issue (4): 1443-1449.DOI: 10.3969/j.issn.0438-1157.2014.04.040

循环絮凝对水中SUVA及膜污染的影响

王捷^1,2, 程志杨², 贾辉^1,2, 张宏伟^1,2, 黄亚丽³

1 天津工业大学中空纤维膜材料与膜过程省部共建国家重点实验室培育基地, 天津 300387;
2 天津工业大学环境与化学工程学院, 天津 300387;
3 天津膜天膜科技股份有限公司, 天津 300457

收稿日期:2013-07-22 修回日期:2013-08-30 出版日期:2014-04-05 发布日期:2013-09-30
通讯作者: 王捷（1979—），男，博士，副教授。
作者简介:王捷（1979—），男，博士，副教授。
基金资助:
国家自然科学基金项目（51108314，51078264）；水体污染控制与治理科技重大专项（2011ZX07410-002）；天津市科技兴海项目（KJXH2012-5）。

Influence of circulating flocculation process on SUVA and membrane fouling

WANG Jie^1,2, CHENG Zhiyang², JIA Hui^1,2, ZHANG Hongwei^1,2, HUANG Yali³

1 State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Tianjin Polytechnic University, Tianjin 300387, China;
2 School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, China;
3 Tianjin MOTIMO Membrane Technology Co., Ltd., Tianjin 300457, China

Received:2013-07-22 Revised:2013-08-30 Online:2014-04-05 Published:2013-09-30
Supported by:
supported by the National Natural Science Foundation of China(51108314, 51078264).

摘要/Abstract

摘要： 将循环接触絮凝与膜过滤相结合组成循环接触絮凝-膜过滤（CF-MF）工艺，以传统混凝-膜过滤（C-MF）工艺为对照，考察两种工艺在延缓膜污染方面的差异。采用比紫外吸光度（SUVA）作为有机物亲/疏水特性的评价指标，分析工艺变化对SUVA的影响以及SUVA和综合膜污染指数（UMFI）之间的内在联系。结果发现，膜出水SUVA与膜污染呈很好的相关性，出水SUVA越高，膜污染越严重；在最佳工艺条件下，CF-MF出水和混凝上清液SUVA分别达到了1.74 L·mg^-1·m^-1和1.18 L·mg^-1·m^-1，去除率与C-MF工艺相比分别提高17%和29%，说明CF-MF工艺对水中疏水性物质的去除效果比C-MF更好，能够有效控制疏水性物质对膜形成的污染；与C-MF相比，CF-MF能够更有效地去除水中的有机物，当混凝剂氯化铁投加量为6 mg·L^-1、回流絮体浓度为10 mg·L^-1时，UV₂₅₄和DOC的去除率分别达到了58.75%和49.7%。

关键词: 循环絮凝, 混凝, 过滤, 膜污染, SUVA, UMFI

Abstract: Comparing with coagulation membrane filtration(C-MF) process, the circulating flocculation membrane filtration (CF-MF) process is a combination of circulating contact flocculation with membrane filtration. The differences of membrane fouling development in the two processes were investigated in this study. SUVA was used as an evaluation index of hydrophilic/hydrophobic properties for organic matters to assess the effect of process variation on SUVA as well as to find relation between SUVA and index of comprehensive membrane fouling. The results indicated that there exists a good liner relationship between SUVA in membrane filtration and membrane fouling. The higher SUVA was, the more serious membrane fouling was. In the optimal operation conditions, SUVA in membrane filtration effluent and coagulation process supernatant were 1.74 L·mg^-1·m^-1and 1.18 L·mg^-1·m^-1 for CF-MF process, the removal of organic matters increased by 17% and 29%, comparing with C-MF process, indicating that the removal of hydrophobic organic matters and the control of fouling formation on membrane from them was better for CF-MF than C-MF. Comparing with C-MF process, the CF-MF is more effective for removing organic matters. With coagulant dosing of 6 mg·L^-1 and reflux floc concentration of 10 mg·L^-1, the removal rate of UV₂₅₄ and DOC were 58.75% and 49.7% respectively.

Key words: circulate flocculation, coagulation, filtration, membranes fouling, scale ultraviolet absorbance, unified membrane filtration index

中图分类号:

王捷, 程志杨, 贾辉, 张宏伟, 黄亚丽. 循环絮凝对水中SUVA及膜污染的影响[J]. 化工学报, 2014, 65(4): 1443-1449.

WANG Jie, CHENG Zhiyang, JIA Hui, ZHANG Hongwei, HUANG Yali. Influence of circulating flocculation process on SUVA and membrane fouling[J]. CIESC Journal, 2014, 65(4): 1443-1449.

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循环絮凝对水中SUVA及膜污染的影响

Influence of circulating flocculation process on SUVA and membrane fouling

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