Dye wastewater treatment and membrane fouling in a moving bed-UV-photocatalytically modified membrane bioreactor†

IF 3.1 4区环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL Environmental Science: Water Research & Technology Pub Date : 2024-07-24 DOI:10.1039/D4EW00474D

Jing Luo, Tingxi Liu, Weiwei Chen, Caixia Dong and Jianguo Liu

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Abstract

A moving bed-UV-photocatalytically modified membrane bioreactor (MB-UVPMBR) system effectively removed organic matter, and the removal efficiency of Lanasol blue 3R (LB) reached 85.1%, which was significantly greater than that of a moving bed membrane bioreactor (MBMBR) system. The dye removal efficiency of the system was enhanced as a result of the degradation of LB by a polyvinylidene fluoride (PVDF)/TiO₂-modified membrane under UV irradiation. An analysis of the membrane resistance distributions of the two systems revealed that the main cause of membrane fouling was the deposition of a cake layer on the membrane surface. Compared with the membrane in the MBMBR system, the membrane in the MB-UVPMBR system exhibited a 67.5% reduction in total filtration resistance, which was attributed to the hydrophilicity and photocatalytic properties of the PVDF/TiO₂-modified material. Overall, the removal efficiency of organic pollutants in the MB-UVPMBR system was better than that in the MBMBR system.

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移动床-紫外光催化改性膜生物反应器中的染料废水处理和膜堵塞问题

移动床-紫外光催化改性膜生物反应器（MB-UVPMBR）系统能有效去除有机物，对LanasolBlue 3R（LB）的去除率达到85.1%，明显高于移动床膜生物反应器（MBMBR）系统。在紫外线照射下，聚偏二氟乙烯（PVDF）/二氧化钛改性膜对 LB 的降解提高了该系统的染料去除效率。对两个系统的膜阻力分布的分析表明，膜堵塞的主要原因是膜表面的滤饼层沉积。与 MBMBR 中的膜相比，MB-UVPMBR 中的膜的总过滤阻力降低了 67.5%，这归因于 PVDF/TiO2 改性膜的亲水性和光催化特性。总体而言，MB-UVPMBR 系统对有机污染物的去除效率优于 MBMBR 系统。

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来源期刊

Environmental Science: Water Research & Technology ENGINEERING, ENVIRONMENTALENVIRONMENTAL SC-ENVIRONMENTAL SCIENCES

CiteScore

8.60

自引率

4.00%

发文量

206

期刊介绍： Environmental Science: Water Research & Technology seeks to showcase high quality research about fundamental science, innovative technologies, and management practices that promote sustainable water.