連続発酵における質量流量計を使用したアルコール濃度のオンライン測定 : 清酒の連続醸造に関する研究(第3報)

概要

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A method for the estimation of ethanol concentration using a mass-flow meter to detect the CO_2 evolved from a continuous fermentor was developed. In a single-stage reactor, an estimating equation was theoretically constructeed from a differential equation of mass balance for ethanol produciton. It was : P_t=exp(-∫^t_<t0>Ddt){∫^t_<t0>exp(∫^t_<t0>Ddt)KVco_2/Vdt+P_<t0>}.Here, if the dilution rate, D, and CO_2 gas flow rate, Vco_2,from time t_0 to t were given, the ethanol concentration could be determined. The constant, K, defined as the amount of ethanol produced (g) per liter of evolved CO_2,was affected by the temperature in the continuous fermentor. A learning method to identify the constant in the running reactor is proposed. By this method, when about 10 ethanol measurements were obtained by gas chromatography, the constant was identified with near accuracy, and differences between the measured and calculated values were narrow.
社団法人日本生物工学会の論文
1991-09-25