Characteristics of Organic Acid Degradation by Yeast

고농도 유기산폐수의 효모에 의한 분해연구

  • 김석원 (인하대 화공·고분자·생물공학부) ;
  • 허병기 (인하대 화공·고분자·생물공학부) ;
  • 김은기 (인하대 화공·고분자·생물공학부)
  • Published : 1999.04.01


Characteristics of organic acid degradation by isolated yeast strain was investigated. Optimum initial pH was 5. Increase in cell mass was proportional to the decrease in organic acid degradation. Also no accumulation of byproduct was observed during degradation. Acetic acid degraded fast, followed by butyric acid and propionic acid in order. No significant substrate inhibition was observed up to 12 g/L of acetic acid 7 g/L of propionic acid, respectively. However, inhibition of butyric acid was significant above 4 g/L. Cell mass yield was 0.2-0.4 g cell/g acids and decreased at high decreased at high organic acid concentration. 95% of organic acid (7.5 g/L), corresponding to 13,000 ppm, was degraded in 30-40 hours.


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