错流平板膜过滤技术在白茶饮料澄清中的应用研究

本文应用错流平板膜过滤技术对白茶饮料澄清工艺进行了研究,测定茶汤在不同截留分子量（2、6、10万单位）超滤膜的膜通量;不同跨膜压力下超滤膜的膜通量及色差值,并对茶汤进行感官审评。试验结果表明,白茶茶汤明度与清澈度较超滤前大幅提高,孔径越小茶汤化学成分截留越多,滋味变浅薄,汤色评分下降。综合茶汤感官品质及操作适用性,合适的膜过滤操作参数为：6万单位到10万单位截留分子量范围的超滤膜;跨膜压力1～2kg/cm2。本研究结果为该技术在白茶饮料生产中的实际应用提供重要参考。

Study on the Application of Flat Membrane Ultrafiltration in Clarification Processing of White Tea Beverage

Flat membrane ultrafiltration was applied to study clarification processing of white tea berverage in this article. Effects of membrance pore and membrance pressure on membrance flux were investigated. Moreoner, effect of membrance ultrafiltration on color value and sensory changes of the white tea drink was studied too. The results showed that the lightness and clarity were improved. The membrane with small pore would intercept some chemical contents, and it may lead to the decrease of sensory evaluation. The optimized results were as follows, membrane pore was 60,000～10,000units, membrane pressure was 1～2 kg/cm2. The purpose of this article was to provide reference to the application of this technologyl in white tea berverage processing.