好氣培養に關する基礎的研究 : (第2報)醗酵槽の酸素供給能に関する実験式の決定

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The affect of the rate of air flow and the revolution number on the rate of oxygen supply in a fermentor, was investigated. In results, the following empirical formula was obtained, Kd=kVαNβ hence, Kd: oxygen absorption coefficient (g mol. of O2/atm. min. cc) V: rate of air flow (l/min.) N: revolution number (r. p. m.) k, α, β, : constants characteristic of each fermentor In case of our 8l capacity fermentor (Fig. 2), the values of those constants were: α=0.30, β=2.56 and k=8.06×10-14, for the combination of a single hole sparger with a disk type agitator (Fig. 3 and Fig. 4): and α=0.37, β=2.45 and k=3.49×10-13, for the combi-nation of a ring type sparger with two paddle type agitators (Fig. 5 and Fig. 6). So-called “loading point” could be seen in the range of high agitation speed. In the range of low agitation speed and high rate of air flow, however, an extraordinary increase of Kd was found.
社団法人日本農芸化学会の論文