冷冻浓缩-等电点结晶法对谷氨酸等电母液的资源化利用  

Recycling of isoelectric mother liquor by freeze concentration-isoelectric point crystallization method

作　　者：金亮 徐泓 方正楠 廖天润 付涛 陈鹏 潘雅林 张乐华[1] JIN Liang;XU Hong;FANG Zhengnan;LIAO Tianrun;FU Tao;CHEN Peng;PAN Yalin;ZHANG Lehua(School of Resources and Environmental Engineering,National Key Laboratory of Environmental Risk Assessment and Control of Chemical Processes for Environmental Protection,East China University of Science and Technology,Shanghai 200237,China;No.2 High School of East China Normal University,Shanghai 200237,China)

机构地区：[1]华东理工大学资源与环境工程学院,国家环境保护化工过程环境风险评价与控制重点实验室,上海200237 [2]华东师范大学第二附属中学,上海200237

出　　处：《环境工程学报》2022年第6期2099-2106,共8页Chinese Journal of Environmental Engineering

基　　金：国家重点研发计划(2019YFC0408202);国家自然科学基金(21876050)。

摘　　要：以谷氨酸等电母液为研究对象,开展了冷冻浓缩-等电点结晶实验研究,主要考察了成冰率、育晶温度、晶种添加量、晶种粒径等因素对结晶产量和质量的影响。结果表明,成冰率会直接影响晶体的析出量与形态,在成冰率为70%~80%、育晶温度为0℃、添加3%的150目α型谷氨酸晶种时,冷冻浓缩-等电点结晶效果最佳,每升谷氨酸等电母液中能回收13.75 gα型谷氨酸。以上研究结果可为实现谷氨酸资源化回收提供参考。Taking glutamic acid isoelectric mother liquor as the research object,the experimental research of freeze concentration-isoelectric point crystallization was conducted to mainly study the effects of ice formation rate,crystal growth temperature,seed crystal addition amount,seed crystal size and other factors on the crystallization yield and quality.The results show that the ice formation rate could directly affect the precipitation amount and shape of crystals.At the ice formation rate of 70%~80%,the crystal growth temperature of 0 ℃,the best freezing concentration-isoelectric point crystallization effect occurred with the addition of 3% of 150 mesh α-type glutamic acid seed crystals,and 13.75 g glutamic acid could be recycled from 1L isoelectric mother liquor.The above research results can provide a reference for the realization of glutamic acid recycling.

关 键 词：冷冻浓缩 悬浮结晶 等电点结晶 资源回收 谷氨酸等电母液 

分 类 号：X703[环境科学与工程—环境工程]