세라믹 막을 이용한 Lactobacillus 균주의 농축공정에 관한 연구 = A study on the concentration process of Lactobacillus cell using ceramic membrane

다국어 초록 (Multilingual Abstract)

It is an anaerobic germ that Lactobacillus cell concentrated using ceramic membrane has high stability and long lifetime as compared with polymeric membrane. The effects of operating pressure, temperature, crossflow velocity on cell harvesting have been studied. Also the variation of flux and transmembrane pressure(TMP) with increasing concentration ratio and the change of TMP at constant concentration ratio (volumetric concentration factor : VCF) regarding the optimization have been examined. It showed that the permeate flux increased gradually with the increasing of transmembrane pressure, crossflow velocity, and volumetric concentration factor. The higher initial flux was due to the reduction of viscosity at elevated temperature. However, as operating time progressed, the effect of temperature was negligible since the effect of viscosity became minor. As a result that operate in a constant concentration ratio, decreased degree could know that become slowly although the flux decreases according as operating time progressed. The flux is a very stable in the condition of constant VCF range. The yield of Lactobacillus (PS 406) which was cultivated at 37 ℃ was concentrated about 4.9×109 after operation.

목차 (Table of Contents)

• 1.서론
• 2.실험
• 2.1 실험장치
• 2.2. 시료의 선정의 분석
• 2.3. 분리막의 재질 및 선정
• 3.결과 및 고찰
• 3.1. TMP에 따른 flux의 변화
• 3.2. 선속도에 따른 flux의 변화
• 3.3. Membrane 표면의 fouling
• 3.4. 온도에 따른 flux의 변화
• 3.5. 농축비 제한
• 3.6. 농축비 증가에 따른 flux의 변화
• 3.7. 일정 농축비에서의 flux의 변화
• 3.8. 운전후 CIP(clean-in-place)에 의한 투과수의 회복율
• 4.결론