アルコール醗酵における酵母の増殖について : (第2報) 連続醗酵の場合(生物化学工学特集号-II 滅菌および培養工学)

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In a previous report, the kinetics of growting yeast in batch alcohol fermentation using saccharified corn mash as the media were studied from theoretical experimental standpoints.The present study was made to undertake some theoretical analyses of single-stage continuous fermentation by developing the results obtained in a previous paper. These are then discussed experimentally.The growth rate of yeast was defined as a function of the existing concentration of yeast according to the following equation : (dN)/(dt)=aN・(1-N/(Nm))…(1)The derived curve is shown in Fig. 1.When the specific growth rate μ, was defined as : μ=1/N・(dN)/(dt)…(2)the relation of μ to yeast concentration can be shown as in Fig. 2 with reference to the equation (3).While in a settled condition during continuous fermentation, the relation of yeast concentration to dilution rate was found from these equations to be as follows : N=Nm・(1-D/a)…(3)where α is equal to the maximum specific growth rate μm, which was determined from batch fermentation.The results obtained from experiments when varing the dilution rate were in good agreement with the equation. The date are shown in Table 1,from which Fig. 3 is drawn.
社団法人日本生物工学会の論文
1965-08-25