随后，用丹宁酶处理过的茶叶提取物要经过超过滤处理。
The tea extract which has been treated with tannase is subsequently subjected to an ultra-filtration treatment.
虽然用丹宁酶及UF综合处理茶叶提取物，原则上可以得到高质量的茶叶提取物。
Although in principle a good quality of tea extract is obtained by the combination of treating tea extract with tannase followed by an UF treatment.
在本发明的所选用的具体操作中，丹宁酶被循环使用，因而在一开始要使用高剂量的丹宁酶。
In a preferred embodiment of the present invention, the tannase is recycled and in that CASE higher initial levels of tannase are used.
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