茶浓缩汁加工关键技术与装备的研究  

Study on The Key Technique of Tea Juice Concentrating And Its Processing Equipments

作　　者：权启爱[1] 杨钟鸣[1] 尹军峰[1] 孙成[1] 李虓[2] 金寿珍[1] 刘新[1] 丁志[1] 王际春[2] 

机构地区：[1]中国农业科学院茶叶研究所,浙江杭州310008 [2]中国农业机械化科学研究院,北京100083

出　　处：《茶叶科学》2003年第B06期63-67,共5页Journal of Tea Science

摘　　要：对茶浓缩汁加工参数的研究结果表明,茶汁完成提取后,先行粗滤和细滤,然后应用超滤膜将茶汁中的大分子物质分离和去除,再用反渗透膜进行循环浓缩,可获得优质的茶浓缩汁产品。超滤膜孔径,绿茶、乌龙茶以8～10万分子量为宜,红茶则以10万分子量以上为好,超滤膜的工作压力为0.2～0.3MPa,茶汁温度40℃以下为宜。反渗透膜的工作压力为1.5～3.0 MPa、工作温度控制在50℃以下为好。以此为基础专门设计的茶浓缩汁生产线,生产率可达 100 kg/h(年产500吨),茶浓缩汁浓度可达20％(Brix),并且透光率高,易于溶解,能保持茶叶风味,并可去除中、下档茶苦涩味重等部分不足,品质明显优于传统热浓缩产品。Research results on parameters of tea juice concentrating showed that, after tea was extracted, the bulk filtration and fine filtration were carried out, then the macro molecule substances were separated and removed by using ultra-filtrating membrane method, then cycling concentrated by reverse-osmosis membrane, the high quality concentrated tea juice was obtained. The pore diameter of the ultra-filtration membrane is 8 x 104-10 x 104 molecule weight for green tea and Oolong tea, and larger than 10 x 104 for black tea. The working pressure of ultra-filtration membrane is 0.2 ~ 0.3 MPa, suitable temperature for tea juice is lower than 40C. The working pressure of reverse-osmosis membrane is 1.5 ~ 3.0 MPa, suitable temperature for tea juice is lower than 50C. The tea juice productivity of the producing line designed on the base of above technique is 100 kg/h, with concentration of tea juice 20% (Brix) and better quality compared with that of traditional product.

关 键 词：茶浓缩汁 加工技术 加工装备 粗滤 细滤 超滤膜 反渗透膜 茶饮料 

分 类 号：TS275[轻工技术与工程—农产品加工及贮藏工程]