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Integrated approach for biofouling control.

J S Vrouwenvelder1, J C Kruithof, M C M Van Loosdrecht

  • 1Wetsus, Centre of Excellence for Sustainable Water Technology, Agora 1, P.O. box 1113, 8900 CC, Leeuwarden, The Netherlands. hans.vrouwenvelder@wetsus.nl

Water Science and Technology : a Journal of the International Association on Water Pollution Research
|November 25, 2010
PubMed
Summary

Biofouling in membrane systems remains a challenge. An integrated approach (ABC) combining equipment design, growth conditions, and cleaning agents offers a more effective strategy than single methods.

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Area of Science:

  • Environmental Science
  • Chemical Engineering
  • Materials Science

Background:

  • Biofouling significantly impacts the performance of spiral-wound nanofiltration and reverse osmosis membranes.
  • Existing control strategies often fail under diverse operational circumstances, necessitating new approaches.

Purpose of the Study:

  • To provide an overview of 12 complementary biofouling control strategies.
  • To propose an integrated Approach for Biofouling Control (ABC) for membrane systems.

Main Methods:

  • Review and synthesis of recent insights into biofouling mechanisms.
  • Development of the ABC framework encompassing equipment design, biomass growth, and cleaning agents.
  • Exploration of three future scenarios: tolerant systems, capillary membranes, and phosphate limitation.

Main Results:

  • Combinations of control approaches can be more effective than single methods.
  • The ABC approach broadens focus from membranes/microorganisms to the entire filtration system.
  • Chemical cleaning and inhibitors are currently necessary but may be minimized in the future.

Conclusions:

  • An integrated, system-wide approach to biofouling control is more rational and effective.
  • Future membrane systems may require less chemical intervention due to sustainability and cost drivers.
  • Biofouling tolerant systems, capillary membranes, and phosphate limitation represent potential future control scenarios.