효모생산에 관한 연구(제1보) 고구마전분박 산당화액을 이용한 효모생산

Studies on the Production of Yeast. (Part 1) Yeast Production from the Hydrolyzate of Sweet Potato Starch Cake as a Carbon Source

  • 양한철 (고려대학교 농과대학 식품공학과) ;
  • 최용진 (고려대학교 농과대학 식품공학과) ;
  • 성하진 (고려대학교 농과대학 식품공학과)
  • 발행 : 1974.06.01

초록

Studies on the optimum conditions of acid hydrolysis of sweet potato starch cake and its utilization on the production of Saccharomyces cerevisiae as a carbon source were conducted and the results showed as follows; 1.The highest hydrolysis rate, 62.7 % of the reducing sugar based on the weight of the dry matter, was obtained when the starch cake was hydrolyzed with 1.0% of hydrochloric acid at 2.0 kg/$\textrm{cm}^2$ for 30 minutes. 2. But the yeast grew most favorably on the hydrolyzate obtained by treating the starch cake with 0.5% of hydrochloric acid at 2.0 kg/$\textrm{cm}^2$ for 10 minutes. Reducing sugar content of hydrolyzate was 51.4%. 3. The optimum pH of the culture medium was 7.0, Cell growth reached to the maximum at 36 hours of cultivation time. 4. According to the vitamin requirement tests, Ca-pantothenate was found to be a promoting factor for the growth of the yeast cells. 5. "Gluten acid hydrolyzate" was most effective to the cell growth when added to the medium at the concentration of 0.1% as a nitrogen source. 6. Sacch. cerevisiae could assimilate the sugars in the hydrolyzate about 89.1%, and the yields of the yeast cells showed 23.2mg/ml of culture medium.

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