味精清洁生产蒸发凝结水再利用研究

Studies on Reusability of Condensate Water from Cleaner Production of Monosodium Glutamate

在味精清洁生产工艺中 ,利用四效蒸发技术来浓缩谷氨酸等电结晶母液 ,所得的蒸发凝结水因COD值稍高而不能直接排放。为解决这一问题并节约水资源 ,文章中研究了将凝结水作为配料水应用于味精生产的可行性。通过与自来水进行比较 ,考察了其对液化、糖化和发酵过程的影响。分别用凝结水和自来水作为配料水进行制糖和发酵实验 ,结果二者均无明显差异。这一结果表明 ,蒸发凝结水应用于谷氨酸发酵是可行的。

In the cleaner production of MSG,the four effect evaporation system was used to concentrate the glutamic acid isoelectric mother solution.The condensate water with a little higher COD wasn't allowed to drain out directly.To solve this problem,the possibility of reusing the condensate water in the MSG production has been investigated in this paper.Compared to the tap water, the application of condensate water in the process of the starch liquefaction,saccharificaton and glutamic acid fermentation was studied. No obvious difference was observed when the two kinds of water were used in the saccharification process and glutamic acid fermentation.This demonstrated that the condensate water could be reused in the process of the glutamic acid fermentation.