Journal of Microbiology and Biotechnology

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
권호 표지

Effects of Ultrasonic Waves on Filtration Performance and Fermentation in an Internal Membrane-Filtration Bioreactor

  • PARK, BYUNG GEON (Department of Environment and Health, Kwang-Ju Womens University) ;
  • WOO GI LEE (Department of Chemical Engineering and Bioprocess Engineering Research Center, Korea Advanced Institute of Science and Technology) ;
  • WEI ZHANG (Department of Biochemical Engineering, Dalian Institute of Chemical Physics, Chinese Academy of Sciences) ;
  • YONG KEUN CHANG (Department of Chemical Engineering and Bioprocess Engineering Research Center, Korea Advanced Institute of Science and Technology) ;
  • HO NAM CHANG (Department of Chemical Engineering and Bioprocess Engineering Research Center, Korea Advanced Institute of Science and Technology)
  • Published : 1999.06.01
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Abstract

Ultrasonic wave technology was employed to improve filtration performance and ethanol production in a bioreactor equipped with an internal ceramic-membrane filter module. The filtration performance was found to depend on the power and the pattern of ultrasonic wave irradiation. Under the optimized conditions (irradiation time: 25 see, period: 5 min, and ultrasonic power: 60 W), the flux was improved with the periodic-pause method by 200-700％ compared with the control (with no irradiation), while the improvement was only 30 to 90％ without the periodic-pause method. The final ethanol concentration also increased slightly. However, in a more severe condition (irradiation time: 2.5 min, period: 5 min, and ultrasonic power: 110 W), the irradiation of ultrasonic waves was observed to disturb cell integrity and viability, and thus to decrease ethanol production.

Keywords

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