Membrane and Water Treatment

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Design, fabrication, and performance analysis of a twisted hollow fibre membrane module configuration

  • Palmarin, Matthew J. (Department of Environmental Systems Engineering, University of Regina) ;
  • Young, Stephanie (Department of Environmental Systems Engineering, University of Regina) ;
  • Lee, Tsun Ho (Department of Environmental Systems Engineering, University of Regina)
  • Received : 2014.07.20
  • Accepted : 2014.11.17
  • Published : 2015.01.25
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Abstract

The compact structure and high-quality effluent of membrane bioreactors make them well-suited for decentralized greywater reclamation. However, the occurrence of membrane fouling continues to limit their effectiveness. To address this concern, a unique membrane module configuration was developed for use in a decentralized greywater treatment system. The module featured local aeration directly below a series of inclined membrane bundles, giving the overall module a twisted appearance compared to a module with vertically orientated fibres. The intent of this design was to increase the frequency and intensity of collisions between rising air bubbles and the membrane surface. Material related to the construction of custom-fit modules is rarely communicated. Therefore, detailed design and assembly procedures were provided in this paper. The twisted module was compared to two commercially available modules with diverse specifications in order to assess the relative performance and marketability of the twisted module with respect to existing products. Contaminant removal efficiencies were determined in terms of biochemical oxygen demand, chemical oxygen demand, ammonia, total nitrogen, total phosphorus, and turbidity for each module. Membrane fouling was monitored in terms of permeate flux, transmembrane pressure, and membrane resistance. Following 168 h of operation, the twisted module configuration demonstrated competitive performance, indicating good potential for further development and commercialization.

Keywords

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