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Physicochemical characterization of tight nanofiltration membranes for dairy wastewater treatment
Chen, Zhiwei1,2; Luo, Jianquan1,2; Hang, Xiaofeng1; Wan, Yinhua1,2

Interrelationship between physicochemical properties and separation performance of nine commercial nano-filtration (NF) membranes was systematically investigated. Seven NF membranes, NT103 and NT102 from Microdyn-Nadir, DF90 and DF30 from OriginWater, NF70, NF40-I and NF40-II from Hangzhou Development Center of Water Treatment Technology, were reported for the first time. FTIR spectra demonstrated that the skin layer of NF90, NT103 and DF90 was made from fully aromatic polyamide, while other membranes were the semi-aromatic ones. The fully aromatic membranes had rougher, thicker and less hydrophilic polyamide layer as well as lower permeability than the semi-aromatic ones. When applying these membranes to concentrate the pretreated dairy wastewater, NF270, DF30 and NF40-I with high lactose rejection, low salt rentention low transmembrane pressure (TMP) and negligible irreversible fouling (IF) are preferable. Furthermore, it was found that the pore size and skin thickness dominated the membrane permeability. Meanwhile, the pore size and TMP produced a negligible effect on the IF, while the higher roughness and contact angle resulted in the higher IF, implying that the main fouling mechanism in this case is the foulants adsorption at membrane surface rather than pore blocking (affected by pore size) or cake formation (its compressibility was influenced by TMP). Moreover, the retentions of both lactose and salts by the tight NF membranes appeared to be governed by steric hindrance. Thus, this work provides a new method to study membrane separation and fouling mechanisms by correlating the physiochemical properties and separation performance of different membranes.

KeywordDairy Wastewater Membrane Fouling Skin Layer Polyamide Tight Nf Membrane
WOS HeadingsScience & Technology ; Technology ; Physical Sciences
Indexed BySCI
WOS KeywordReverse-osmosis Membranes ; High-flux ; Interfacial Polymerization ; Performance Correlation ; Anaerobic Fermentation ; Polyamide Membranes ; Ro Membranes ; Nf Membranes ; Film ; Surface
WOS Research AreaEngineering ; Polymer Science
WOS SubjectEngineering, Chemical ; Polymer Science
Funding OrganizationYouth Innovation Promotion Association(2017069) ; '100 Talents Program' of Chinese Academy of Sciences
WOS IDWOS:000414200700006
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Cited Times:22[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Univ Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Chen, Zhiwei,Luo, Jianquan,Hang, Xiaofeng,et al. Physicochemical characterization of tight nanofiltration membranes for dairy wastewater treatment[J]. JOURNAL OF MEMBRANE SCIENCE,2018,547:51-63.
APA Chen, Zhiwei,Luo, Jianquan,Hang, Xiaofeng,&Wan, Yinhua.(2018).Physicochemical characterization of tight nanofiltration membranes for dairy wastewater treatment.JOURNAL OF MEMBRANE SCIENCE,547,51-63.
MLA Chen, Zhiwei,et al."Physicochemical characterization of tight nanofiltration membranes for dairy wastewater treatment".JOURNAL OF MEMBRANE SCIENCE 547(2018):51-63.
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