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Membrane Water Treatment
  Volume 12, Number 4, July 2021 , pages 139-147
DOI: https://doi.org/10.12989/mwt.2021.12.4.139
 

Consecutive chemical cleanings of hollow fiber ultrafiltration membranes from a pilot-scale surface water treatment plant
Yong-Gu Lee, Hojung Rho, Sangwon Kim, Jaegwan Shin, Seungjoon Kim and Kangmin Chon

 
Abstract
    The effects of the order of chemical cleaning protocols on the removal of hollow fiber ultrafiltration (HUF) membrane foulants, and restoration of membrane surface properties, were identified through autopsies of fouled HUF membrane modules from a pilot-scale surface water treatment system (Hongcheon-gun, Kangwon province, Republic of Korea). Quantitative and qualitative differences in the extracted HUF membrane foulants were found to depend on the types of chemical cleaning protocols applied, the consecutive cleaning protocol II (CP II; 0.1 N NaOH -> 0.1 N HCl; the sum of DOC = 215.19 mgC m⁻2; the sum of TN = 17.82 mg N m⁻2; the sum of metals = 25.14 mg m⁻2) extracted both organic and inorganic foulants from HUF membrane surfaces more effectively than consecutive cleaning protocol I (CP I: 0.1 N HCl -> 0.1 N NaOH; the sum of DOC = 189.89 mg C m⁻2; the sum of TN = 13.66 mg N m⁻2; the sum of metals = 9.95 mg m⁻2). Furthermore, the surface morphological characteristics of the cleaned HUF membrane using CP II were relatively similar to the virgin membrane surface compared to those of the cleaned HUF membrane using CP I. These findings demonstrated that the sequential coupling of two different chemical cleaning protocols played critical roles in removing organic and inorganic foulants from the fouled HUF membrane surfaces and restoration of membrane surface elementary composition potentially related to HUF membrane performances.
 
Key Words
    consecutive chemical cleaning; membrane autopsy; membrane fouling; pilot-scale surface water treatment plant; ultrafiltration
 
Address
Yong-Gu Lee: Department of Environmental Engineering, College of Art, Culture, and Engineering, Kangwon National University, Kangwondaehak-gil 1, Chuncheon-si, Gangwon-do 24341, Republic of Korea

Hojung Rho: Department of Land, Water and Environment Research, Korea Institute of Civil Engineering and Building Technology, 283 Goyang-Daero, Ilsanseo-gu, Goyang-si, Gyeonggi-do 10223, Republic of Korea

Sangwon Kim, Jaegwan Shin and Kangmin Chon: Department of Environmental Engineering, College of Art, Culture, and Engineering, Kangwon National University, Kangwondaehak-gil 1, Chuncheon-si, Gangwon-do 24341, Republic of Korea/ Department of Integrated Energy and Infra system, Kangwon National University, Kangwondaehak-gil 1, ChunCheon-si, Gangwon-do 24341, Republic of Korea

Kangmin Chon: Technology Research Laboratory, Kolon Global Corporation, 11 Kolon-ro, Gwacheon-si, Gyeonggi-do 13837, Republic of Korea


 

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