Effect of pounding on apple press process and juice yield

In the experiment, apple has been pounded at high speed before pressure for increasing the burst of cell and dissociation of cytolymph. Most of apple cell tissue can be bursted after pounded, while the connection between the cell walls is still widely preserved, and the dissociation rate of cytolymph can be increased up to 67%～69%. The results show that pounding can increase 20 percentage point in dissociation rate, and 15.21 percentage point in juice yield, as compared with the conventional shearing process. The pounding plus pressrue time is 50％ shorter than that of shearing press at comparable juice yield.