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Chemcial Industry and Engineering 2022, Vol. 39 Issue (6) :101-108    DOI: 10.13353/j.issn.1004.9533.20210860
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Effect of micro-nano bubbles on humic acid fouling of ultrafiltration membrane
LI Xiangxiang1, HAN Xu2
1. School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China;
2. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China

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Abstract In order to effectively solve the problems of membrane fouling and reduction of permeate flux caused by natural organic matter during the ultrafiltration (UF) process, micro-nano bubbles (MNBs) water treatment was introduced during the UF transport and backwashing process of humic acid (HA) solution to strengthen the UF process. The effects of MNBs on the permeate flux, rejection coefficient and the membrane defouling were studied. The results showed that the normalized flux of pure H2O and humic acid (HA) (5 mg·L-1) solution increased to 1.1—1.3 and the rejection coefficient of HA increased by 2.5%-22.0%. The normalized flux recovery increased by 21% and 25% after cleaning and backwashing in the presence of MNBs, respectively.
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LI Xiangxiang
HAN Xu
Keywordsultrafiltration   micro-nano bubbles   humic acid (HA)   permeate flux     
Received 2021-12-13;
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LI Xiangxiang, HAN Xu.Effect of micro-nano bubbles on humic acid fouling of ultrafiltration membrane[J]  Chemcial Industry and Engineering, 2022,V39(6): 101-108
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