Characteristics of Bubble Flow Behavior in a Gas-liquid Countercurrent Bubble Column Bioreactor

기-액 향류 흐름 기포탑 생물 반응기에서 기포 흐름 거동 특성

  • Son, Sung-Mo (School of Chemical Engineering, Chungnam National University) ;
  • Kang, Suk-Hwan (School of Chemical Engineering, Chungnam National University) ;
  • Lee, Chan-Gi (School of Chemical Engineering, Chungnam National University) ;
  • Jung, Sung-Hyun (School of Chemical Engineering, Chungnam National University) ;
  • Kang, Yong (School of Chemical Engineering, Chungnam National University) ;
  • Kim, Sang-Done (Department of Biomolecular & Chemical Engineering, KAIST)
  • 손성모 (충남대학교 화학공학과) ;
  • 강석환 (충남대학교 화학공학과) ;
  • 이찬기 (충남대학교 화학공학과) ;
  • 정성현 (충남대학교 화학공학과) ;
  • 강용 (충남대학교 화학공학과) ;
  • 김상돈 (한국과학기술원 생명화학공학과)
  • Received : 2004.07.29
  • Accepted : 2005.01.10
  • Published : 2005.04.30

Abstract

Characteristics of bubbling behavior and bubble properties were investigated in a gas-liquid countercurrent bubble column of in diameter 0.152 m and 3.5 m in height, respectively. Effects of gas and liquid velocities and bubble distribution mode(even, wall-side, central or asymmetric distribution) on the bubble properties such as chord length, frequency, rising velocity and holdup in the reactor were measured and examined by means of dual resistivity probe method. The bubble size, frequency and holdup increased with increasing gas($U_G$) or liquid velocity($U_L$). The rising velocity of bubbles increased with increasing $U_G$, whereas decreased with increasing $U_L$. The uniformity of bubble size distribution and bubble holdup decreased when the distribution mode of bubbles at the gas distributor was changed from even to wall-side, central or asymmetric. The central distribution of bubbles was better than asymmetric mode but worse than wall-side distribution, in considering the bubble holdup and uniformity of distribution.

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