Fouling process and anti-fouling mechanisms of dynamic membrane assisted by photocatalytic oxidation under sub-critical fluxes

Tao Yang; Fen Liu; Houfeng Xiong; Qiyong Yang; Fushan Chen; Changchao Zhan

doi:10.1016/j.cjche.2018.10.019

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Fouling process and anti-fouling mechanisms of dynamic membrane assisted by photocatalytic oxidation under sub-critical fluxes

Separation Science and Engineering | Updated：2026-01-06

- Fouling process and anti-fouling mechanisms of dynamic membrane assisted by photocatalytic oxidation under sub-critical fluxes
- Chinese Journal of Chemical Engineering Vol. 27, Issue 8, Pages: 1798-1806(2019)
- Affiliations：
  
  1. School of Chemistry and Environment Engineering, Jiujiang University,Jiujiang,China,332005
  2. Jiangxi Province Engineering Research Center of Ecological Chemical Industry, Jiujiang University,Jiujiang,China,332005
  3. State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Zhejiang University of Technology,Hangzhou,China,310014
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2018.10.019
  CLC：
- Published：2019
- Accepted：
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Tao Yang, Fen Liu, Houfeng Xiong, Qiyong Yang, Fushan Chen, Changchao Zhan. Fouling process and anti-fouling mechanisms of dynamic membrane assisted by photocatalytic oxidation under sub-critical fluxes[J]. Chinese Journal of Chemical Engineering, 2019, 27(8): 1798-1806.
DOI：

Tao Yang, Fen Liu, Houfeng Xiong, Qiyong Yang, Fushan Chen, Changchao Zhan. Fouling process and anti-fouling mechanisms of dynamic membrane assisted by photocatalytic oxidation under sub-critical fluxes[J]. Chinese Journal of Chemical Engineering, 2019, 27(8): 1798-1806. DOI： 10.1016/j.cjche.2018.10.019.

摘要

Abstract

Membrane fouling is often considered as a hindrance for the application of microfiltration/ultrafiltration (MF/UF) for drinking water production. A novel process of photocatalytic membrane reactor/dynamic membrane (PMR/DM)

operating in a continuous mode under sub-critical flux

was proposed for the mitigation of membrane fouling caused by humic acids (HAs) in water. The mechanism of membrane fouling alleviation with synergistic photocatalytic oxidation and dynamic layer isolating effect was comprehensively investigated from the characterization of foulant evolution responsible for the reversible and irreversible fouling. The results showed that the PMR/DM utilized photocatalytic oxidation to enhance the porosity and hydrophilicity of the fouling layer by converting the high molecular weight (MW) and hydrophobic HA molecules with carboxylic functional groups and aromatic structures into low-MW hydrophilic or transphilic fractions

including tryptophan-like or fulvic-like substances. The fouling layer formed in the PMR/DM by combination of photocatalytic oxidation and DM running at a sub-critical flux of 100 L·h

-1

·m

-2

was more hydrophilic an

d more porous

resulting in the lowest trans-membrane pressure (TMP) growth rates

as compared to the processes of ceramic membrane (CM)

DM and PMR/CM. Meanwhile

the dynamic layer prevented the foulants

particularly the high-MW hydrophobic fractions

from contacting the primary membrane

which enabled the membrane permeability to be restored easily.

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