摘要
苏氨酸生产在氨基酸产业中占有重要的地位,大部分采用发酵法生产,但是在发酵完成之后,发酵液的处理尤其是废液的再利用,由于各品种氨基酸发酵液,其残糖含量和能利用酸含量以及物料的pH值、黏度不同,处理方法也不一样。苏氨酸末次母液是生产后期很难解决的问题,由于COD高、蛋白质及苏氨酸含量高不可以直接排放。对苏氨酸生产工艺作了阐述,并对苏氨酸末次母液进行了分析,提出采用硫酸高温水解,将母液中多糖水解还原为单糖,再进行母液回用,达到母液再次利用的目的,不仅提高了苏氨酸的收率,而且可减少污染保护环境。
The production of threonine plays an important role in the amino acid industry. The main production route for threonine was microbial fermentation. However, the treatment of the last mother liquor becomes a big problem since the liquid with high content of COD, protein and threonine can not be directly discharged. Due to the variety of residual sugar content, acid content, pH and viscosity of the fermentation broth, their treatment are really different. In this paper, the production process of threonine is described and a mean of high-temperature hydrolysis by sulfuric acid is proposed based on the analysis of contents in the last mother liquor of threonine. In this process, the polysaccharides in mother liquor is reduced to monosaccharide, and the mother liquor is reused, which not only improves the yield of threonine, but also reduces the environmental pollution.
作者
尹相明
王洪
喻书文
宋关键
YIN Xiangming;WANG Hong;YU Shuwen;SONG Guanjian(Changchun Dacheng Industrial Group Co.,Ltd.,Changchun 130062,China)
出处
《发酵科技通讯》
CAS
2019年第4期220-223,共4页
Bulletin of Fermentation Science and Technology
关键词
L-苏氨酸
母液
多糖
水解
单糖
L-threonine
mother liquor
polysaccharides
hydrolysis
simple sugars
