Optimization of the Process for the Jujube Powder by Spray Drying

In this study, the process of spray drying of jujube powder was optimized by adding soybean protein and pectinase to jujube pulp. Based on the single-factor experiments, the response surface analysis was used to optimize the feed concentration, the inlet air temperature and the atomizer speed with the jujube powder collection rate and moisture content as the response value. The results showed that the optimum technological parameters of spray-dried jujube powder were as follows:Feed concentration 18%, atomizer speed 440 r/s, inlet air temperature 170℃, the yield of jujube powder was 57.81%±0.75%, moisture content was 4.76%±0.08%. This method increased the rate of jujube powder, improved the quality of jujube powder, which provided a reference for in-depth study of jujube powder.