文献：一种新型催化膜与臭氧工艺集成用于二次废水处理：微污染物去除、膜污染控制及其机理

一种新型催化膜与臭氧工艺集成用于二次废水处理：微污染物去除、膜污染控制及其机理

1. 文章信息

标题：A novel catalytic membrane integrated with ozone process for secondary wastewater treatment: Micropollutant removal, membrane fouling control, and its mechanisms

中文标题：一种新型催化膜与臭氧工艺集成用于二次废水处理：微污染物去除、膜污染控制及其机理

2. 文章链接

https://doi.org/10.1016/j.desal.2023.116869

3. 期刊信息

期刊名：Desalination Volume 565 , 1 November 2023, 116869

4. 作者信息：Yuan He a b, Zhan Chen a, Xia Huang a, Xiaomao Wang a, Xianghua Wen a

a.School of Environment, Tsinghua University, Beijing 100084, China

b.China National Institute of Standardization, Beijing 100191, China

5.文中所用产品型号：3S-J5000

重点

•在70天内，O3/MnCe CM工艺可有效去除四种代表性微污染物，并在传统污染物去除方面表现出色

•O3/MnCe CM工艺足以在处理实际含微污染物废水时实现稳定有效的运行。

•O3/MnCe CM工艺改善了TMP控制，特别是降低了不可逆结垢阻力。

•O3/MnCe CM工艺的防污机理被提出为等电点降低、膜表面和孔内的催化臭氧氧化以及膜槽中的臭氧氧化。

摘要

膜过滤和催化臭氧氧化的结合在微污染废水处理中的研究越来越多，但膜污染仍然阻碍了其实际应用。本研究建立了一种新型的MnCe催化膜与臭氧过程相结合（O3/MnCe-CM），并将其应用于连续运行中去除实际二级出水中的四种微污染物。高效去除四种具有代表性的微污染物，去除率在89.33%至99.49%之间，对常规污染物具有优异的性能，DOC、UV254、多糖和蛋白质分别减少了30%、88%、32.5%和24%。O3/MnCe CM工艺具有改进的TMP控制效果，在Rir/Rt为10.17%的情况下，明显降低了不可逆结垢阻力，这是O3/CM工艺的42.9%。过滤70天后，TMP仅增加了24.51kPa。更重要的是，防污机制被提出为膜等电点降低和催化臭氧氧化的综合作用，膜等电点将提高其对污染物的排斥力，催化臭氧氧化减少了积聚在膜表面和孔内的有机污垢。此外，膜槽中的臭氧氧化降低了通过MnCe-CM的污染物负荷。总的来说，本研究提供了一种具有广阔应用前景的新型O3/MnCe CM工艺。

Abstract

The integration of membrane filtration and catalytic ozonation is increasingly investigated in micro-polluted wastewater treatment, whereas membrane fouling still inhibits its practical application. In the present study, a novel MnCe-catalytic membrane integrated with ozone process (O3/MnCe-CM) was established and applied to remove four micropollutants from the real secondary effluent in continuous operation. Efficient removal of four representative micropollutants with the removal rate ranging from 89.33 % to 99.49 % and superior performance on conventional pollutants, with the DOC, UV254, polysaccharide, and protein reduced by 30 %, 88 %, 32.5 %, and 24 %. The O3/MnCe-CM process had an improved TMP control effect, explicitly reducing the irreversible fouling resistance given a Rir/Rt of 10.17 % which is 42.9 % of that of the O3/CM process. After filtering for 70 days, the TMP only increased by 24.51 kPa. More importantly, the antifouling mechanism was proposed as the combined effects of the decrease of the membrane isoelectric point that elevated its repulsion towards pollutants and the catalytic ozonation that reduced the organic foulants accumulated on the membrane surface and inside the pores. In addition, ozonation in the membrane tank decreased the pollutant load passing through MnCe-CM. In all, the present study provides a novel O3/MnCe-CM process with a promising application perspective.

臭氧设备

3S-J5000臭氧在线检测仪