Tea beverage is one of the most frequently consumed
drinks in the world. Green tea is an unfermented tea, and
contains more catechins than black tea or oolong tea. Green
tea has been found to have many beneficial effects such as
antioxidant, antimutagenic effect, antibacterial and antiviral
activity (Cabrera et al. 2006). In China, there is about
fifteen thousand tons of tea concentrate produced every
year, which is used as additive or raw material, though
transportation and storage of tea concentrate is intractable.
Green tea concentrate is the main tea concentrate processed
in China, because green tea accounts for more than 70% of
the total tea yield. However, tea cream appears in tea
concentrate, which not only has an unattractive appearance
but also damages both taste and aroma quality of tea
concentrate