Influence of bubble size distribution and air flux on membrane surface shear stress in submerged membrane bioreactor

DOI
  • LI Tairi
    Dept. of Civil Engineering, Musashi Institute of Technology
  • NAGAOKA Hiroshi
    Dept. of Urban and Civil Engineering, Musashi Institute of Technology

Bibliographic Information

Other Title
  • 浸漬型膜分離活性汚泥法において気泡径及び曝気量が膜面せん断力に与える影響

Abstract

This study is aimed at elucidating the mechanism by which rising air bubbles induce shear stress on a vertically set flat-sheet membrane surface.Shear stress on the flat-sheet membrane surface caused by aeration was measured directly using a shear stress sensor. In all experimental conditions, time-averaged upward-direction shear stress on the membrane surface was compared to theoretical shear stress values considering the effect of water flow on membrane surface. Water velocity measurement of bubble flow using Laser Doppler Velocimeter revealed that shear stress working on membrane surface was closely related to upward-direction water velocity. Bubble size measurement of bubble flow using Digital Camera suggested that shear stress working on membrane surface was influenced by bubble size distribution.

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Details 詳細情報について

  • CRID
    1390001204111350528
  • NII Article ID
    130003775879
  • DOI
    10.11532/proes1992.44.143
  • ISSN
    1884829X
    13415115
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
    • KAKEN
  • Abstract License Flag
    Disallowed

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