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Su Z, Liu T, Seviour T, et al. Identifying active concentrations of biopolymers for enhancing membrane nanofiltration performance: From bench-scale tests to real production considerations. Sci Total Environ. 2021;151808doi: 10.1016/j.scitotenv.2021.151808.
Su, Z., Liu, T., Seviour, T., Li, S., Tian, L., Zhang, G., & Yu, W. (2021). Identifying active concentrations of biopolymers for enhancing membrane nanofiltration performance: From bench-scale tests to real production considerations. The Science of the total environment, 151808. https://doi.org/10.1016/j.scitotenv.2021.151808
Su, Zhaoyang, et al. "Identifying active concentrations of biopolymers for enhancing membrane nanofiltration performance: From bench-scale tests to real production considerations." The Science of the total environment vol. (2021): 151808. doi: https://doi.org/10.1016/j.scitotenv.2021.151808
Su Z, Liu T, Seviour T, Li S, Tian L, Zhang G, Yu W. Identifying active concentrations of biopolymers for enhancing membrane nanofiltration performance: From bench-scale tests to real production considerations. Sci Total Environ. 2021 Nov 20;151808. doi: 10.1016/j.scitotenv.2021.151808. Epub 2021 Nov 20. PMID: 34808182.
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Sci Total Environ. 2021 Nov 20;151808. doi: 10.1016/j.scitotenv.2021.151808. Epub 2021 Nov 20.

Identifying active concentrations of biopolymers for enhancing membrane nanofiltration performance: From bench-scale tests to real production considerations.

The Science of the total environment

Zhaoyang Su, Ting Liu, Thomas Seviour, Shuo Li, Long Tian, Guotao Zhang, Wenzheng Yu

Affiliations

  1. State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Center for the Environmental Implications of Nanotechnology, Duke University, Durham, NC 27708, United States. Electronic address: [email protected].
  2. School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China. Electronic address: [email protected].
  3. Aarhus University Centre for Water Technology (WATEC), Biological and Chemical Engineering, Aarhus 8000, Denmark; Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, 637551, Singapore. Electronic address: [email protected].
  4. State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
  5. School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China. Electronic address: [email protected].
  6. School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China. Electronic address: [email protected].
  7. State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. Electronic address: [email protected].

PMID: 34808182 DOI: 10.1016/j.scitotenv.2021.151808

Abstract

In the last decades, membrane-based nanofiltration (NF) technique has been widely applied for safe and high-quality drinking water production worldwide. NF membrane fouling has become one of the main obstacles in its application due to high operation cost, and thus numerous efforts have been made. However, there is still a large disconnect between academic findings and their applications. Hence, novel approaches for further exploitation and application are required based on feasibility of implementation. In this work, an optimized design of membrane-based NF plants was proposed, inspired by natural biopolymers present in feed water of NF unit. Specifically, we found beneficial functions of biopolymers, including NF membrane fouling alleviation and effluent quality improvement; these advantages could only be "activated" under a certain concentration range of biopolymers (0-1 mg C/L here), and less or more is not acceptable. This indicated that a NF unit is better to follow a microfiltration (MF) (instead of ultrafiltration (UF) which removes biopolymers) process during which natural biopolymers could be remained; also, this approach is suggested to be valid across different seasons when biopolymers' concentrations could be controlled within an "activated" range by mixing MF and UF permeates. Furthermore, three representative reference biopolymers with different, confirmed spatial structures and molecular weight (MW) were used to elucidate the micro-level functions of natural biopolymers on NF membranes, suggesting that cake layer structures shaped by various biopolymers determine the resulting NF performance. Overall, this innovative proposal is expected to be considered and adopted towards more energy-efficient NF technology for drinking water supply.

Copyright © 2021 Elsevier B.V. All rights reserved.

Keywords: Anti-fouling property; Biopolymers; Drinking water; Nanofiltration; Water treatment plants

Conflict of interest statement

Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this pa

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