Simulation of fluid and shear stress behaviors in reciprocating membrane bioreactors for fouling control using fluid–structure interaction analysis

Yongsun Jang, Hwa Soo Ryoo, Yong Cheol Shin, Hee deung Park

Research output: Contribution to journalArticlepeer-review

Abstract

In this study, fluid–structure interaction simulations of a reciprocating membrane bioreactor were performed under various conditions. The reactor and membrane module were configured in a reactor-scale. The shear stress on the tensioned membrane is governed by the fluids it repels. With reciprocating speeds of 10, 20, and 30 cm/s, the maximum shear stresses within one cycle were 3.03, 3.74, and 1.14 N/m2, respectively. Excessively high speed prevented the fluid from accelerating and dispersing, resulting in a low shear stress. For triangle, sine, and square motions, the maximum shear stresses were 0.92, 3.74 and 4.36 N/m2, respectively. This suggests that both acceleration and deceleration in motion are critical for generating high shear stress. When the slack increased from 0 to 0.5 and 1%, the maximum shear stress decreased from 3.74 to 2.11 and 1.2 N/m2, respectively, owing to the decrease in membrane tension. The results of this study should be considered when attempting to increase fouling removal effects reciprocating membrane bioreactor.

Original languageEnglish
Article number121220
JournalSeparation and Purification Technology
Volume294
DOIs
Publication statusPublished - 2022 Aug 1

Keywords

  • Fluid–structure interaction
  • Membrane bioreactor
  • Membrane fouling
  • Reciprocation
  • Simulation

ASJC Scopus subject areas

  • Analytical Chemistry
  • Filtration and Separation

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