| 摘要 |
PURPOSE: A yeast medium composition causing less environmental pollution is provided, thereby the waste water produced after cultivation of yeast can be easily and cheaply treated. CONSTITUTION: The yeast medium composition causing less environmental pollution consists of 3 to 9 wt.% of hydrol, 1.25 to 10 g/l of urea, 1 to 16 g/l of KH2PO4, 1 to 20 g/l of MgSO4·7H2O, 0.01 to 10 g/l of NaCl, 0.01 to 10 g/l of CaCl·2H2O, trace elements(100X), 1 to 8 g/l of yeast extract, 50 wt.% of buffer solution and water, wherein the yeast is Saccharomyces cerevisiae; and the hydrol is prepared by enzymatically decomposing corn starch and contains 92% of glucose, 3.5% of maltose and isomaltose, 3% of DP3 and 1.5% of DP4. Preferably, the yeast medium composition consists of 3 wt.% of hydrol, 5 g/l of urea, 8 g/l of KH2PO4, 1 to 20 g/l of MgSO4· 7H2O, 1 g/l of NaCl, 1 g/l of CaCl·2H2O, trace elements(100X), 1 g/l of yeast extract, 50 wt.% of buffer solution and water.
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