생명과학회지 (Journal of Life Science)

  • 제6권1호
  • /
  • Pages.6-13
  • /
  • 1996
  • /
  • 1225-9918(pISSN)
  • /
  • 2287-3406(eISSN)
한국생명과학회 (Korean Society of Life Science)
권호 표지

Aspergillus niger를 이용한 우유폐수로 부터의 구연산 생산

Citric Acid Production from Concentrated Milk-wastewater by Aspergillus niger

  • 김세권 (부산수산대학교 화학과) ;
  • 노호석 (부산수산대학교 화학과) ;
  • 변희국 (부산수산대학교 화학과) ;
  • 전유진 (부산수산대학교 화학과)
  • 발행 : 1996.03.01
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초록

우유공장에서 배출되는 폐수를 Aspergillus niger ATCC 9142의 발효기질로 하여 회분식발효기에서 구연산의 생산에 관하여 연구하였다. 구연산의 생산성을 높이기 위하여 각종 금속이온, Mn$^{2+}$, Fe$^{2+}$, Cu$^{2+}$ 및 Mg$^{2+}$ 등을 첨가하여 발효시킨 결과, Mn$^{2+}$, Fe$^{2+}$, Cu$^{2+}$의 첨가시 구연산의 생산이 증가하였으나, Mg$^{2+}$를 첨가한 경우는 오히려 감소하였다. 우유폐수의 환원당 농도를 각가 50g/l 및 100g/l로 농축하여 Aspergillus niger ATCC 9142를 이용하여 생산된 구연산은 7.2g/l 및 16.5g/l 이상이었다. 실험적인 결과에 의한 세포의 성장, 구연산의 생산 및 기질의 소모속도는 수확적인 모델링에 의해 예측한 경우와 잘 일치하고 있음을 알 수 있었다.

The possible use of milk-wastewater as a fermentation media for the production of citric acid by Aspergillus niger has been investigated. The addition of Mn$^{2+}$ , Fe$^{2+}$ and Cu$^{2+}$ to the medium promoted citric acid production while only Mg$^{2+}$ decreased citric acid production. The concentrations of citric acid produced were marked up to 7.2g/l and 16.5g/l in a batch bioreactor by Aspergillus niger ATCC 9142 with 50g/l and 100g/l of reducing sugar concentration in milk-wastewater, respectively. A mathematical model was developed and simulating the predictability of cell growth, citric acid production and substrate consumption rate, and gave good agreement results with experimental data.

키워드

참고문헌

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