CAS OpenIR
New insights into effect of alkaline cleaning on fouling behavior of polyamide nanofiltration membrane for wastewater treatment
Huang, Jiachen; Luo, Jianquan1; Chen, Xiangrong; Feng, Shichao; Wan, Yinhua
2021-08-01
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
Volume780Pages:11
AbstractMembrane fouling is an intractable issue in wastewater treatment by nanofiltration (NF) membrane, and alkaline cleaning is the most effective approach to remove organic fouling on NF membrane. However, it was found that pore swelling of NF membrane induced by alkaline cleaning might reduce cleaning efficiency, and it is never quantified and its effect on membrane fouling behavior is still mysterious. In this work, membrane pore swelling effect (similar to 9.7%, increment of effective pore size) induced by alkaline cleaning (pH 11) is confirmed and its effect on fouling behavior of the polyamide NF membrane is investigated based on experimental and modelling results. It is found that the alkali-induced pore swelling phenomenon would disappear after water filtration at neutral pH for 30 min, and if such cleaned membrane is faced by the small foulants during this pore shrinkage period, the concentration polarization and membrane fouling would be severer, and the subsequent alkaline cleaning is less effective because more foulants enter the enlarged pores and are tightly embedded in the membrane. Thus, the irreversible fouling of the NF membrane increases from 20% to 40% while its permeability recovery declines from 100% to 67% after six fouling/cleaning cycles. When an anionic surfactant sodium dodecyl sulfate (SDS, 10 mM) is added in the alkaline cleaning solution, the adsorption of SDS in/on the membrane can not only improve its hydrophilicity and negative charge, but also quickly eliminate the alkali-induced pore swelling effect and avoid the accumulation of foulants in the pores, thereby enhancing the antifouling performance of the NF membrane. Using the alkaline SDS cleaning, the irreversible fouling of the NF membrane maintains below 10% while its permeability recovery keeps above 100% in six continuous fouling/cleaning cycles. (C) 2021 Elsevier B.V. All rights reserved.
KeywordNanofiltration Wastewater treatment Chemical cleaning Membrane fouling Pore swelling
DOI10.1016/j.scitotenv.2021.146632
Language英语
WOS KeywordDISSOLVED ORGANIC NITROGEN ; REVERSE-OSMOSIS ; REMOVAL ; AGENTS ; REJECTION ; MOLASSES
Funding ProjectScience and Technology Service Network Program of Chinese Academy of Sciences[KFJ-STS-QYZX-096] ; Province Key Research and Development Program of Shandong[2019JZZY010348] ; Youth Innovation Promotion Association of Chinese Academy of Sciences[2017069]
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
Funding OrganizationScience and Technology Service Network Program of Chinese Academy of Sciences ; Province Key Research and Development Program of Shandong ; Youth Innovation Promotion Association of Chinese Academy of Sciences
WOS IDWOS:000653088000009
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/48891
Collection中国科学院过程工程研究所
Corresponding AuthorLuo, Jianquan
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Huang, Jiachen,Luo, Jianquan,Chen, Xiangrong,et al. New insights into effect of alkaline cleaning on fouling behavior of polyamide nanofiltration membrane for wastewater treatment[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2021,780:11.
APA Huang, Jiachen,Luo, Jianquan,Chen, Xiangrong,Feng, Shichao,&Wan, Yinhua.(2021).New insights into effect of alkaline cleaning on fouling behavior of polyamide nanofiltration membrane for wastewater treatment.SCIENCE OF THE TOTAL ENVIRONMENT,780,11.
MLA Huang, Jiachen,et al."New insights into effect of alkaline cleaning on fouling behavior of polyamide nanofiltration membrane for wastewater treatment".SCIENCE OF THE TOTAL ENVIRONMENT 780(2021):11.
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