Korean Chemical Engineering Research

  • 제50권5호
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  • Pages.874-878
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  • 2012
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  • 0304-128X(pISSN)
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  • 2233-9558(eISSN)
한국화학공학회 (The Korean Institute of Chemical Engineers)
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Aspergillus niger NRRL 567을 이용한 고체배양에서 완충용액이 구연산 생산에 미치는 영향

Effect of Buffers on Citric Acid Production by Aspergillus niger NRRL 567 in Solid Substrate Fermentation

  • 김진우 (맥길대학교 바이오시스템공학과)
  • Kim, Jin-Woo (Department of Biosystems Engineering, McGill University)
  • 투고 : 2012.03.01
  • 심사 : 2012.04.20
  • 발행 : 2012.10.01
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초록

곰팡이균을 이용한 구연산 생산에 있어 액체배양의 초기 pH는 구연산 생산에 유의한 영향을 미친다고 알려져 있다. 본 연구에서는 고체배양에서 Aspergillus niger를 이용한 구연산 생산에 여러 pH의 완충용액이 구연산 생산에 미치는 영향을 밝혀 최적의 완충용액을 찾고자 연구하였다. 실험에 적용된 여러가지 완충용액은 구연산 생산에 영향을 미치며 높은 초기 pH 조건에서 구연산 생산성이 우수한 것으로 나타났다. 여러가지 완충용액 중, phosphate (pH 8.6) 완충용액과 carbonate 완충용액(pH 10.0)이 고체발효에서 구연산 생산에 가장 적합함을 알 수 있었다. Carbonate 완충용액(pH 10.0)을 사용하여 고체배지의 초기 pH를 6.8으로 하였을 경우, 최대 구연산 생산인 564.3 g/kg solid substrate 얻을 수 있었다. 또한, 염기 또는 산을 사용하여 고체 배지의 초기 pH를 4.42로 조정한 배지에 비해 phophate 완충용액을 사용한 pH 4.48의 고체배지에서 구연산 생산성이 1.5배 증가함을 알 수 있었다. 이는 완충용액의 사용이 구연산 생산에 의한 배지의 산성화를 방지해 세포성장과 생산성을 높였다고 결론지을 수 있다.

In the submerged fermentation of fungi, it was known pH had significant effect on the citric acid production. Various growth conditions were applied with different buffer on citric acid production by Aspergillus niger NRRL 567 grown on peat moss to find the optimum pH and most effective buffer solution. The initial pHs of different buffer solutions significantly influenced on the citric acid production and A. niger NRRL 567 produced citric acid more efficiently at high pHs. A phosphate buffer and a carbonate buffer with pH 8.6 and pH 10.0 were identified as suitable buffer solutions for citric acid production. The maximal citric acid production of 564.3 g/kg solid substrate was achieved employing carbonate buffer at pH 10.0.

키워드

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피인용 문헌

  1. Optimization of Fermentation Conditions for the Production of Citric Acid by Aspergillus niger NRRL 567 Grown on Agricultural by Products vol.52, pp.3, 2014, https://doi.org/10.9713/kcer.2014.52.3.402