KSBB Journal
- 제13권6호
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- Pages.675-680
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- 1998
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- 1225-7117(pISSN)
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- 2288-8268(eISSN)
유기산 및 포도당 혼합배지에서 Azotobacter vinelandii UWD의 생장 및 PHBV 생산에 대한 용존산소의 영향
Effect of Dissolved Oxygen on the Growth of Azotobacter vinelandii UWD and Production of PHBV in the Mixture of Organic Acids and Glucose
초록
In both 7L and 20L fermentor experiments the level of dissolved oxygen (D.O) strongly affected growth and PHBV production of Azotobacter vinelandii UWD. A higher D.O. increased carbon substrate consumption rate and cell growth rate with a similar residual biomass production. However, a lower D.O. was a much better condition for PHBV production. In a 20L fermentor experiments controlled at 5% D.O. cell growth rate was about twice faster(0.555 hr-1 and 0.260 hr-1 at the acid and the glucose phase, respectively) with an equal amount(4.5 g/L) of residual biomass production. However, PHBV content in the cell(62.3 wt%) increased 17.3 times at 1% D.O.