酵母製造に關する研究 : 黒糖製造の際生ずるバガスから酵母の製造

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By hydrolyzing bagasse produced in black sugar manufacturing process discontinuously twice with 0.4% sulphuric acid, 33.66% reducing sugar calculated on the basis of the perfectly dried bagasse was obtained. This hydrolyzate was used for yeast production and the following results were obtained.1) Among the four kinds of yeasts, i.e., the yeast No. 110 (isolated by the author), Torula utilis, FLEISCHMANN'S yeast, Rasse XII, cultivated in the bagasse hydrolyzate, the yeast No. 110 and Torula utilis, especially the former, grew excellently, but FLEISCHMANN'S yeast and Rasse XII made a poor growth. The yields of these yeasts in the medium are shown in Tables 2 and 3.2) The suitable period of cultivation for the yeast No. 110 in the bagasse hydrolyzate containing 1〜2% sugar was 1〜2 days, although it varied with sugar concentration of the medium.3) The amounts of (NH_4)_2SO_4 and KH_2PO_4 fitted for the growth of the yeast No. 110 and Torula utilis were 30〜40% and 1〜2% of the sugar used, respectively.4) The degree of growth of the yeast No. 110 and Torula utilis in the secondary hydrolyzate was less than that in the primary hydrolyzate. The yields of yeasts from these hydrolyzates are shown in Table 7.5) Particularly profitable results were not obtained by the mixed cultures of Torula utilis and the isolated yeast in the bagasse hydolyzates.6) When the yeast No. 110 was cultivated in the bagasse hydrolyzate supplemented with (NH_4)_2SO_4,and KH_2PO_4,at 30℃ for 30 hrs under aeration, dry yeast was obtained in a yield of about 19% to the dried bagasse.
社団法人日本生物工学会の論文
1954-07-15

酵母製造に關する研究 : 黒糖製造の際生ずるバガスから酵母の製造

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