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KMID : 0380619830150010056
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Korean Journal of Food Science and Technology
1983 Volume.15 No. 1 p.56 ~ p.61
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The Effect of Nutritional Balance between Carbon and other Nutrient Sources on the Growth of Sporobolomyces holsaticus
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신동화/Shin, Dong Hwa
민병용/구영조/박완수/Min, Byong Yong/Koo, Young Jo/Park, Wan Soo
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Abstract
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Direct production of biomass from starch using amylolytic yeast, Sporobolomyces holsaticus FRI Y-5 was studied with varying the ratios between carbon and other nutrient sources in the medium. It was investigated under condition of constant C/P and C/S ratio to influence the initial concentration of starch (S_0) and C/N ratio on its growth which is described as the specific growth rate (μ), cell yield (Y), the maximum concentration of cell (X_m), and productivity (P). They were very dependent on both S_0 and C/N ratio. The form of the relationship between and μ and S_0 was observed to be similar to saturation kinetics at C/N = 100 but presented substrate inhibition at other C/N ratios. As S_0 was changed from 22.5 to 90 g/ℓ, Y was observed to vary with C/N ratios but seemed to decrease as a wholes X_m was linearly related to S_0 at more than C/N = 50 but at less than C/N = 10 substrate inhibition was presented. P increased suddenly to S_0 = 45 g/ℓ and then changed decreasingly at less than C/N = 50, but at more than C/N = 100 it changed increasingly. The effect of C/P ratio and C/S ratio on the yeast growth was also investigated at constant S_0 and C/N ratio. μ was dependent on C/P and C/S ratios, but Y, independent on them. But X_M was reliant upon C/P ratio but not upon C/S ratio.
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KEYWORD
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