摘要
以赤砂糖回溶糖浆为研究对象,研究了高pH条件下硫酸镁和两性含2%二氧化硅聚硅酸锌对回溶糖浆的脱色效果及机理。在单因素试验基础上,采用响应面分析法对脱色条件进行优化,获得最佳条件为:镁离子用量500mg/L、含2%二氧化硅的聚硅酸锌用量1.57%、pH值11、温度30℃。该条件下脱色率高达92.36%。采用扫描电子显微镜(SEM)和电位分析仪对混凝物和糖汁体系进行了表征,结果表明脱色机理为电中和吸附。
The effect and mechanism of decolorization were studied with magnesium sulfate and amphoteric 2% polysilicate zinc on the brown granulated syrup under high pH conditions.The factors and levels of response surface analysis were determined on the basis of single factor tests.The decolorization process was optimized by response surface analysis to obtain the optimum process conditions:magnesium sulfate of 500 mg/L,dosage of 2% silica polysilicic acid zinc of 1.57%,and pH 11.Under this condition,the decolorization rate reached 92.21%.The composites and sugar juice system were characterized by scanning electron microscopy(SEM)and potential analyzer.The results showed that the decolonization mechanism was electric neutralization and adsorption.
作者
李慰霞
李利军
杨岚风
毛祥
程昊
LI Wei-xia;LI Li-jun;YANG Lan-fen;MAO Xiang;CHENG Hao(College of Biological and Chemical Engineering,Guangxi University of Science and Technology,Liuzhou,Gmgxi 545006,China;Guungxi Key Laboratory oJ Green Processing of Sugar Resources,Guangxi University of Science and Technology,Liuzhou,Guangxi 545006,China;Collaborative Innovation Center of Guangxi Sugar Industry,Nanning,Guangxi 530004,China;Key Laboratory for Processing of Sugar Resources of Guangxi Higher Education Institutes,Guangxi University of Science and Technology,Liuzhou,Guangxi 545006,China)
出处
《食品与机械》
北大核心
2019年第2期55-61,共7页
Food and Machinery
基金
国家自然科学基金(编号:31560466)
关键词
硫酸镁
聚硅酸锌
脱色
絮凝
作用机理
magnesium sulfate
zinc poly-silicate
decolonization
flocculation
mechanism
作者简介
李慰霞,男,广西科技大学在读硕士研究生;通信作者:李利军(1966),男,广西科技大学教授,博士.E-mail:lilijun0562@sina.com.
