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Numerical Modelling Assisted Design of a Compact Ultrafiltration (UF) Flat Sheet Membrane Module.

Mokgadi F Bopape1,2, Tim Van Geel1, Abhishek Dutta3

  • 1Department of Chemical Engineering, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium.

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Summary
This summary is machine-generated.

This study models flat sheet membrane modules for ultra-low pressure (ULP) drinking water treatment. Increased spacer curviness slightly reduces permeate flux, guiding optimal module design for rural communities.

Keywords:
computational fluid dynamics (CFD)flat sheet membrane modulesimulationultra-low pressure (ULP)ultrafiltration (UF)

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Area of Science:

  • Water Treatment Technologies
  • Membrane Science and Engineering
  • Computational Fluid Dynamics

Background:

  • Ultra-low pressure (ULP) membrane systems are crucial for rural drinking water, but module design knowledge is limited.
  • Flat sheet membranes offer advantages over hollow fiber membranes in terms of manufacturing, maintenance, and energy use.
  • Accurate prediction of ULP system performance requires understanding membrane transport properties and fluid hydrodynamics within the module.

Observation:

  • A novel custom flat sheet membrane module was designed and simulated using 3D computational fluid dynamics (CFD).
  • The study investigated the impact of spacer geometry, specifically curviness, on fluid flow and permeate flux.
  • Parametric analysis explored configuration variables to identify optimal design parameters.

Findings:

  • Permeate flux decreased from 2.81 L/m²h (0% curviness) to 2.73 L/m²h (100% curviness) with increasing spacer curviness.
  • Spacer inflow or outflow thickness did not significantly influence fluid flow dynamics.
  • The CFD model successfully predicted fluid flow conditions and identified key geometrical parameters.

Implications:

  • The numerical model provides essential data for designing and fabricating ULP flat sheet membrane modules, especially where technical expertise is scarce.
  • Optimizing spacer design can enhance the efficiency and effectiveness of ULP membrane systems for drinking water treatment.
  • This research supports the scale-up of lab-scale findings to industrial applications, improving water access in rural areas.