糖蜜酒精废液回用中重金属对酒精发酵的影响

Study on Efffct of heavy metal ions to the recycling of waste liquid from alcoholic fermentation of sugarcane molasses

以甘蔗亚硫酸法、碳酸法的几种典型糖蜜为原料 ,对糖蜜酒精废液中主要的三种重金属元素Fe、Cu、Zn在发酵过程中的影响进行单因素试验。采用原子吸收分光法测定了不同糖蜜的金属元素含量 ,采用双浓度流程利用酵母菌发酵酒精。在此基础上对发酵原料添加不同量的各重金属元素 ,考察它们对发酵的抑制点 ,得出各元素对糖蜜酒精发酵的抑制点为 :Fe3 + 6 0 0～ 70 0、Cu2 + 11～ 13、Zn2 + 12 0 0 (mg/L) 。

Used several kinds of typical molasses of sulphitation process and carbonation process sugarcane molasses as material and saccharomycect to ferment alcoholic adopting the double concentration flow. The effect of mono-factor on the major heavy metal ion (Fe^(3+)、Cu^(2+)、Zn^(2+))of alcoholic waste liquid to alcoholic fermentation is carried out. Measured every kind of metal iron content from different manufactures adopting atom absorbing spectrum method ,Basing on that, added different metal iron content in the ferment material. The result show that the several metal ion inhibited points of the alcoholic ferment is as follows: Fe3+ 600～700mg/L、Cu^(2+) 11～13mg/L、Zn^(2+) 1200mg/L.