Optimization of ozone and ultraviolet combined on dried Lycium barbarum L. sterilization process by response surface methodology

Ozone and ultraviolet combined on Lycium barbarum L. dry fruit sterilization process. Sterilization process conditions were further optimized using response surface methodology as follow :radiation distance 31 cm, processing time 32 min, the ozone concentration 31mg/m3, for this condition, the sterilizing efficiency of ozone and ultraviolet combined on Lycium barbarum L. could be 99.999%. The quality of Lycium barbarum L. dry fruit did not change significantly after treatment under optimum conditions (p >0.05) . This result indicating that the compound effects of ozone and ultraviolet had a certain advantages in terms of sterilization and provided scientific data and effective technical means for microbes degradation of Lycium barbarum L. Ningxia.