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

1. 文章信息

標(biāo)題：A novel catalytic membrane integrated with ozone process for secondary wastewater treatment: Micropollutant removal, membrane fouling control, and its mechanisms

中文標(biāo)題：一種新型催化膜與臭氧工藝集成用于二次廢水處理：微污染物去除、膜污染控制及其機理

2. 文章鏈接

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.文中所用產(chǎn)品型號：3S-J5000

重點

?在70天內(nèi)，O3/MnCe CM工藝可有效去除四種代表性微污染物，并在傳統(tǒng)污染物去除方面表現(xiàn)出色

?O3/MnCe CM工藝足以在處理實際含微污染物廢水時實現(xiàn)穩(wěn)定有效的運行。

?O3/MnCe CM工藝改善了TMP控制，特別是降低了不可逆結(jié)垢阻力。

?O3/MnCe CM工藝的防污機理被提出為等電點降低、膜表面和孔內(nèi)的催化臭氧氧化以及膜槽中的臭氧氧化。

摘要

膜過濾和催化臭氧氧化的結(jié)合在微污染廢水處理中的研究越來越多，但膜污染仍然阻礙了其實際應(yīng)用。本研究建立了一種新型的MnCe催化膜與臭氧過程相結(jié)合（O3/MnCe-CM），并將其應(yīng)用于連續(xù)運行中去除實際二級出水中的四種微污染物。高效去除四種具有代表性的微污染物，去除率在89.33%至99.49%之間，對常規(guī)污染物具有優(yōu)異的性能，DOC、UV254、多糖和蛋白質(zhì)分別減少了30%、88%、32.5%和24%。O3/MnCe CM工藝具有改進的TMP控制效果，在Rir/Rt為10.17%的情況下，明顯降低了不可逆結(jié)垢阻力，這是O3/CM工藝的42.9%。過濾70天后，TMP僅增加了24.51kPa。更重要的是，防污機制被提出為膜等電點降低和催化臭氧氧化的綜合作用，膜等電點將提高其對污染物的排斥力，催化臭氧氧化減少了積聚在膜表面和孔內(nèi)的有機污垢。此外，膜槽中的臭氧氧化降低了通過MnCe-CM的污染物負荷?？偟膩碚f，本研究提供了一種具有廣闊應(yīng)用前景的新型O3/MnCe CM工藝。

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.

臭氧設(shè)備

3S-J5000臭氧在線檢測儀