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0.2~0.3βMPa,茶汁温度40℃以下为宜。反渗透膜的工作压力为1.5~3.0βMPa、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100βkg/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 8×10⁴—10×10⁴ molecule weight for green tea and Oolong tea, and larger than 10×10⁴ for black tea. The working pressure of ultra-filtration membrane is 0.2~0.3βMPa, suitable temperature for tea juice is lower than 40℃. The working pressure of reverse-osmosis membrane is 1.5~3.0βMPa, suitable temperature for tea juice is lower than 50℃. The tea juice productivity of the producing line designed on the base of above technique is 100βkg/h, with concentration of tea juice 20% (Brix) and better quality compared with that of traditional product.