Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Production of Biosurfactant Using Bacillus spp

Bacillus spp.를 이용한 Biosurfactant 생산공정

  • Published : 2002.06.01
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Abstract

Among the bacterial strains isolated from chungkook-jang, Bacillus subtilis CH-1, Bacills circulans K-1 and Bacillus subtitis (natto) N-1, Bacillus subtitis CH-1 showed the highest productivity of biosufactant. A-medium was selected for the basal medium in the large scale production of biosurfactant, and modified to synthetic medium which containing 2% glucose, 0.3% soy peptone, and mineral salts. The surface tension was reduced to maximal value after 96 hr after fermentation, about the 43% of initial tension. Temperature and initial pH of medium was not critical factor for the biosurfactant production. The yield of crude biosurfactant was 6 g/L under the optimum condition.

청국장에서 분리한 Bacillus subtilis CH-1, Bacillus circul문 K-1과 Bacillus subtilis(natto) N-1 모두 biosurfactant를 생성하며 이 중 Bacillus subtilis CH-1가 가장 큰 생성력을 나타냈다. Biosurfactant를 대량 생산하기 위하여 AM, LM, NB과 TSB 배지중 AM을 기본배지로 선정하여 최적 탄소원과 질소원으로 glucose 2%, soy peptone 0.3%와 무기염을 포함하는 합성배지를 완성하였다. Biosurfactant의 생성은 96시간에 최대를 나타냈으며 이때 배지의 표면장력은 초기값의 약 43% 값을 나타냈다. 한편 배양온도 및 pH는 biosurfactant생산에 크게 영향을 주지 않았으며 pH5.0~8.0범위에서 대체적으로 안정한 생성을 유지하였다. 최적조건에서 배양시 crude biosurfactant 수율은 6 g/L를 얻을수 있다.

Keywords

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