Abstract:To investigate the nonthermal sterilization of coconut water using membrane technology coupled with ultraviolet（UV）light，this study applied ceramic membranes coupled with UV light treatment on fresh coconut water.Physical and chemical indexes，microbial indexes and sensory evaluation were used to comprehensively evaluate the treated coconut water.The results showed that the flux of the 500 nm ceramic membrane was stable.The content of soluble solids，pH，content of crude protein and content of reducing sugars of filtered coconut water were similar to those values of fresh coconut water.In addition，with UV treatment，the total bacterial count remained less than 1×105cfu/mL on the 14th day at 4℃.The sensory evaluation of nonthermally sterilized coconut water was not significantly different from that of fresh coconut water （P＞0.05）.But it was significantly different from that of thermally pasteurized coconut water（P＜0.05）.This study proved that the preservation of coconut water can be successfully achieved using 500 nm ceramic membrane filtration coupled with UV light.