The effect of WWTP effluent zeta-potential on direct nanofiltration performance

G.A. Schrader, A. Zwijnenburg, Matthias Wessling

Research output: Contribution to journalArticleAcademicpeer-review

26 Citations (Scopus)

Abstract

Laboratory scale filtration tests utilizing wastewater treatment plants (WWTP) effluent were conducted to investigate fouling and filtration performance of nanofiltration (NF) membranes. The focus of this research is to assess the influence of the zeta-potential of the colloidal fraction in WWTP effluent on nanofiltration performance. As the work presented in this study is conducted on a real effluent rather than model water, a statistical design method has been used to account for effluent composition variations and to obtain valid and significant results. The results show that in direct filtration (NF/RO) of water with normal organic matter (NOM), maintaining a high zeta-potential is imperative to keep cake layer resistance to a minimum. The reversibility of the fouling process was shown to be independent from the changes in zeta-potential. Fouling was shown to be promoted by acidification (pH 5) of the effluent, whereas coagulant addition resulted in an increase in the reversibility of the fouling layer. The work presented in this paper suggests that selection of a proper coagulant to suppress fouling problems should be based on the interaction between membrane and coagulant, while the interaction of coagulant-NOM should be minimal to maintain a high (negative) zeta-potential.
Original languageUndefined
Pages (from-to)80-93
JournalJournal of membrane science
Volume266
Issue number1-2
DOIs
Publication statusPublished - 2005

Keywords

  • IR-54810
  • METIS-229339

Cite this

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abstract = "Laboratory scale filtration tests utilizing wastewater treatment plants (WWTP) effluent were conducted to investigate fouling and filtration performance of nanofiltration (NF) membranes. The focus of this research is to assess the influence of the zeta-potential of the colloidal fraction in WWTP effluent on nanofiltration performance. As the work presented in this study is conducted on a real effluent rather than model water, a statistical design method has been used to account for effluent composition variations and to obtain valid and significant results. The results show that in direct filtration (NF/RO) of water with normal organic matter (NOM), maintaining a high zeta-potential is imperative to keep cake layer resistance to a minimum. The reversibility of the fouling process was shown to be independent from the changes in zeta-potential. Fouling was shown to be promoted by acidification (pH 5) of the effluent, whereas coagulant addition resulted in an increase in the reversibility of the fouling layer. The work presented in this paper suggests that selection of a proper coagulant to suppress fouling problems should be based on the interaction between membrane and coagulant, while the interaction of coagulant-NOM should be minimal to maintain a high (negative) zeta-potential.",
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The effect of WWTP effluent zeta-potential on direct nanofiltration performance. / Schrader, G.A.; Zwijnenburg, A.; Wessling, Matthias.

In: Journal of membrane science, Vol. 266, No. 1-2, 2005, p. 80-93.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - The effect of WWTP effluent zeta-potential on direct nanofiltration performance

AU - Schrader, G.A.

AU - Zwijnenburg, A.

AU - Wessling, Matthias

PY - 2005

Y1 - 2005

N2 - Laboratory scale filtration tests utilizing wastewater treatment plants (WWTP) effluent were conducted to investigate fouling and filtration performance of nanofiltration (NF) membranes. The focus of this research is to assess the influence of the zeta-potential of the colloidal fraction in WWTP effluent on nanofiltration performance. As the work presented in this study is conducted on a real effluent rather than model water, a statistical design method has been used to account for effluent composition variations and to obtain valid and significant results. The results show that in direct filtration (NF/RO) of water with normal organic matter (NOM), maintaining a high zeta-potential is imperative to keep cake layer resistance to a minimum. The reversibility of the fouling process was shown to be independent from the changes in zeta-potential. Fouling was shown to be promoted by acidification (pH 5) of the effluent, whereas coagulant addition resulted in an increase in the reversibility of the fouling layer. The work presented in this paper suggests that selection of a proper coagulant to suppress fouling problems should be based on the interaction between membrane and coagulant, while the interaction of coagulant-NOM should be minimal to maintain a high (negative) zeta-potential.

AB - Laboratory scale filtration tests utilizing wastewater treatment plants (WWTP) effluent were conducted to investigate fouling and filtration performance of nanofiltration (NF) membranes. The focus of this research is to assess the influence of the zeta-potential of the colloidal fraction in WWTP effluent on nanofiltration performance. As the work presented in this study is conducted on a real effluent rather than model water, a statistical design method has been used to account for effluent composition variations and to obtain valid and significant results. The results show that in direct filtration (NF/RO) of water with normal organic matter (NOM), maintaining a high zeta-potential is imperative to keep cake layer resistance to a minimum. The reversibility of the fouling process was shown to be independent from the changes in zeta-potential. Fouling was shown to be promoted by acidification (pH 5) of the effluent, whereas coagulant addition resulted in an increase in the reversibility of the fouling layer. The work presented in this paper suggests that selection of a proper coagulant to suppress fouling problems should be based on the interaction between membrane and coagulant, while the interaction of coagulant-NOM should be minimal to maintain a high (negative) zeta-potential.

KW - IR-54810

KW - METIS-229339

U2 - 10.1016/j.memsci.2005.05.013

DO - 10.1016/j.memsci.2005.05.013

M3 - Article

VL - 266

SP - 80

EP - 93

JO - Journal of membrane science

JF - Journal of membrane science

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