Effect of Different Pore Sizes of Ceramic Microfiltration Membrane on the Removing Rate of Bacteria of Pomegranate Juice

In this experiment,the Xinjiang Hetian acid pomegranate was used as raw materials,pomegranate juice was filtered for bacteria removing by using different pore sizes of ceramic microfiltration membrane,and comparing the changes of membrane flux,bacteria removing rate,nutritional contents and colour value of pomegranate juice with different pore sizes(0.10,0.22,0.45 μm) of ceramic microfiltration membrane,and the suitable pore size of ceramic microfiltration membrane and optimum technological parameter of bacteria removing of pomegranate juice were determined.The results indicated that,the suitable pore size of ceramic microfiltration membrane of bacteria removing of pomegranate juice was 0.22 μm.Optimum technological parameters were as follows: the filtering pressure was 0.20 MPa,the feed temperature was 20 ℃.Under these conditions,the pomegranate juice could keep high membrane flux,and the suspensions and harmful bacteria in juice could be removel effectively,the nutritional contents could be kept better,and the change of pomegranate juice colour during storage time(120 d) was not significant.The removing bacteria technology of ceramic microfiltration membrane filtration could instead of the traditional heat sterilization technology in the process of pomegranate juice.