谷氨酸提取工艺改进研究  

Study on improvement of glutamic acid extraction process

作　　者：李辉 丛泽峰 王兰刚 王林 LI Hui;CONG Zefeng;WANG Langang;WANG Lin(COFCO Biochemical Energy(Longjiang)Co.,Ltd.,Qiqihar 161100,China)

机构地区：[1]中粮生化能源(龙江)有限公司,黑龙江齐齐哈尔161100

出　　处：《发酵科技通讯》2022年第2期82-85,共4页Bulletin of Fermentation Science and Technology

基　　金：国家科技支撑计划项目(2012BAD37B05);农业科技成果转化基金项目(2012CB2B100101)。

摘　　要：使用谷氨酸温敏型菌种生产味精,谷氨酸的产酸率虽然得到了较大提高,但是随着产酸水平的上升,发酵液中的杂质也大幅度增加,导致谷氨酸提取收率下降,中和液质量变差。为提高谷氨酸提取收率,提升中和液质量,利用碟片式分离机和超滤膜对谷氨酸发酵液逐级分段去除蛋白,随后进行等电提取。经过小试,提取收率达到90.2%,中和液透光率达到97.4%、滤速5.5 m/s、中和液中谷氨酸钠质量分数为54.3%,中和液质量得到很大提升,整体工艺指标得到大幅提高。In the process of monosodium glutamate production,the acid yield of glutamic acid fermentation is greatly improved by using the temperature-sensitive strain technology,but the level of impurities content in the fermentation broth also increased greatly with the increase of acid production,which leads to the decrease in the extraction yield of glutamic acid and the deterioration in the quality of the neutralization liquor.In order to further improve the extraction yield of glutamic acid and the quality of the neutralization solution,the glutamic acid fermentation broth was deproteinized step by step by disc separator and ultrafiltration membrane,and then subjected to isoelectric extraction.After a small-scale test,the extraction yield reached 90.2%,the light transmission of the neutralization solution reached 97.4%,the filtration rate was 5.5 m/s,and the content of in sodium glutamate the neutralization solution was 54.3%.The quality of the neutralization solution is greatly improved,and the overall technological index is effectively improved on the basis of the original extraction process.

关 键 词：提取收率 碟片离心机 膜过滤 滤速 透光率 

分 类 号：TS201[轻工技术与工程—食品科学]