2013 Volume 7 Issue 4
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Fu Lele, Li Fang, Wu Liang, Wang Ge. Fouling mechanism in advanced treatment of dyeing wastewater by ultrafiltration membrane[J]. Chinese Journal of Environmental Engineering, 2013, 7(4): 1313-1318.
Citation: Fu Lele, Li Fang, Wu Liang, Wang Ge. Fouling mechanism in advanced treatment of dyeing wastewater by ultrafiltration membrane[J]. Chinese Journal of Environmental Engineering, 2013, 7(4): 1313-1318.
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Fouling mechanism in advanced treatment of dyeing wastewater by ultrafiltration membrane

  • 1.

    College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China

  • Received Date: 09/05/2012
    Accepted Date: 13/02/2012
    Available Online: 09/04/2013
    Fund Project:
  • The fouling mechanism and impact factors of ultrafiltration (UF) membrane with various membrane materials and types for the dyeing wastewater secondary effluent were analyzed. The membrane materials were analyzed with the ftir spectrum (FTIR) and the contact angles of virgin and fouled membranes with polyethersulfone(PES), polysulfone(PSF) and polyetherimide(PEI) were compared. The effects of molecular weight cut off (MWCO) on the membrane flux were investigated in the UF experiment. The membrane fouling mechanism was discussed primarily by fitting to the linearized Herman’s blocking models. The results show that the hydrophilic group on the surface of the membrane material is in direct proportion with the size of the initial flux. COD concentration of permeate decreases with the decreasing of MWCO of UF membranes. Among the three membranes with different materials, the separation efficiency of PES is the highest with effluent COD 47.81 mg/L. The membrane flux of PEI is the highest which reaches 50 L/(m2·h). Cake filtration model is more adequate to represent 1 000 and 10 000 UF membrane for the relation of flux-time, whereas the completely blocking model describes is better for 100 000 UF membrane. It is found that 1 000 (PES) is more suitable for advanced treatment of this kind of dyeing wastewater.
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Fouling mechanism in advanced treatment of dyeing wastewater by ultrafiltration membrane

  • Received Date: 09/05/2012
  • Accepted Date: 13/02/2012
  • Available Online: 09/04/2013
Fund Project:

Abstract: The fouling mechanism and impact factors of ultrafiltration (UF) membrane with various membrane materials and types for the dyeing wastewater secondary effluent were analyzed. The membrane materials were analyzed with the ftir spectrum (FTIR) and the contact angles of virgin and fouled membranes with polyethersulfone(PES), polysulfone(PSF) and polyetherimide(PEI) were compared. The effects of molecular weight cut off (MWCO) on the membrane flux were investigated in the UF experiment. The membrane fouling mechanism was discussed primarily by fitting to the linearized Herman’s blocking models. The results show that the hydrophilic group on the surface of the membrane material is in direct proportion with the size of the initial flux. COD concentration of permeate decreases with the decreasing of MWCO of UF membranes. Among the three membranes with different materials, the separation efficiency of PES is the highest with effluent COD 47.81 mg/L. The membrane flux of PEI is the highest which reaches 50 L/(m2·h). Cake filtration model is more adequate to represent 1 000 and 10 000 UF membrane for the relation of flux-time, whereas the completely blocking model describes is better for 100 000 UF membrane. It is found that 1 000 (PES) is more suitable for advanced treatment of this kind of dyeing wastewater.

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