膜技术在苹果汁加工中的应用  

Application of Membrane Technique in Apple Juice Processing

作　　者：王娇[1] 王枢[1] 张兆利[1] 郭竹洁[1] 

机构地区：[1]西南交通大学生命科学与工程学院,四川成都610031

出　　处：《食品与发酵工业》2011年第6期69-73,共5页Food and Fermentation Industries

基　　金：国家自然科学基金资助项目(20706046)

摘　　要：应用平板式超滤技术对苹果浊汁进行了过滤澄清和除菌。研究了巴式杀菌酶解或未酶解的苹果浊汁、未巴式杀菌未酶解的苹果浊汁、温度对膜通量的影响,超滤组件形式、操作参数对3种不同预处理料液的滤液质量的影响及反渗透系统的浓缩效果。结果表明:平板式超滤膜通量能满足工业需求且大于管式超滤膜,操作温度宜为50℃,当加水倍数0.09倍时,可使浓缩倍数达到20倍。苹果汁超滤液的透光率在97%以上、色值在50%以上、浊度指标小于0.3,pH值、总酸、糖度、氨基态氮等却未发生明显的变化。苹果汁超滤液质量指标和耐热细菌检查结果比较表明,平板式超滤可代替对苹果汁巴式杀菌及酶解。反渗透系统对苹果汁超滤液进行浓缩,浓缩倍数为2～2.3倍,糖截留率为100%。Apple cloudy juice was clarified and sterilized by plate ultrafiltration separation technology.The influence of pasteurization,enzymes and temperature on the flux of the membrane were studied.Three different apple juice were used in the experiment： apple juice with pasteurization and enzyme hydrolysis,apple juice with pasteurization but no enzyme hydrolysis,apple juice without pasteurization and enzyme hydrolysis.The ultrafiltration combination,operating parameters on the filtration quality of the three different materials were studied.The effect of reverse osmosis system was also discussed.The results showed that plate ultrafiltration membrane flux is much more than pipe ultrafiltration membrane and meets the industrial demand.The best operating temperature of ultrafiltration membrane is 50℃.When water is at 0.09 times,the liquid of the concentration factor can reach more than 20 times.Analytical results showed that： the transmittance of the filtration of apple juice was over 97%,color value was above 50%,turbidity was less than 0.3.There is no much difference among pH,acidity,sugar,soluble solid and amino nitrogen content before and after filtration.From the quality of apple juice and heat-resistant bacteria examination results,our conclusion is that the plate ultrafiltration membrane can substitute the pasteurization and enzyme hydrolysis.Ultrafiltration of apple juice was concentrated by reverse osmosis system by 2~2.3 times;sugar retention rate is 100%.

关 键 词：平板式超滤膜 苹果汁 澄清 除菌 

分 类 号：TS255.44[轻工技术与工程—农产品加工及贮藏工程]