Optimizing extraction of pectin from apple pomace

The extraction technology of pectin from apple pomace was studied by method of acid solution and salting-out.The optimal technological conditions for extracting the pectin from apple pomace was determined with the orthogonal experiment and the parameters were 85 ℃,pH1.5,2.0 h and the ratio of pomace and water 1:14(v/v).The pectin were almost salted-out when the additive amount of the saturated solution of aluminum sulfate was 3%(v/v) and the yield of pectin could reach 17%.The research on the additive of desalting solution showed that 1.5 mL desalting solution for per gram wet pectin was enough to desalt absolutely.