서지주요정보
전기투석을 이용한 발효액으로부터 젖산의 in situ 분리 = In situ recovery of lactic acid from fermentation broth by electrodialysis
서명 / 저자 전기투석을 이용한 발효액으로부터 젖산의 in situ 분리 = In situ recovery of lactic acid from fermentation broth by electrodialysis / 이은교.
저자명 이은교 ; Lee, Eun-Gyo
발행사항 [대전 : 한국과학기술원, 1994].
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소장정보

등록번호

8004735

소장위치/청구기호

학술문화관(문화관) 보존서고

MCHE 94019

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

Effects of several factors were evaluated on the rate dialysis of lactic acid in a batch electrodialysis. Those factors were the concentration of source solution, temperature, current, and the circulation rate of source solution through the electrodialysis unit. Lactate increasingly inhibited cell growth and lactic acid production in the order of Ca-lactate, $NH_4$-lactate, Na-lactate, and lactic acid. Although Ca-lactate was found to be the least inhibitory, we did not choose it since pH control using $CaCO_3$ to get Ca-lactate could cause a severe fouling of the membranes involved. Instead, we decided to use $NH_4OH$ for pH control, which resulted in the formation of $NH_4$-lactate. The electrodialysis rate increased with the lactate concentration of the source solution. With the temperature increased from 25℃ to 35℃, the rate increased about 10%. The current was found to be the most important factor. It had strong effects on both the electrodialysis rate and the concentration difference limit between the source and the permeate solution. The effect of circulation rate of the source solution showed no clear tendency. To test the effectiveness of in situ recovery of lactic acid from fermentation broth by electrodialysis, three cases of batch culture were carried out : pH control only, electrodialysis only, and pH control and electrodialysis. When the initial glucose concentration was 50g/L, the case with both pH control and electrodialysis was proved to be the most efficient in terms of average productivity and production yield. When the initial glucose concentration was 150g/L, the fermentation time could be remarkably shrotened by employing electrodialysis.

서지기타정보

서지기타정보
청구기호 {MCHE 94019
형태사항 ix, 75 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 수록
저자명의 영문표기 : Eun-Gyo Lee
지도교수의 한글표기 : 장용근
지도교수의 영문표기 : Yong-Keun Chang
학위논문 학위논문(석사) - 한국과학기술원 : 화학공학과,
서지주기 참고문헌 : p. 66-71
주제 Fermentation.
Dialysis.
Lactic acid.
발효. --과학기술용어시소러스
투석. --과학기술용어시소러스
락트산. --과학기술용어시소러스
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