Abstract:

Abstract: 【OBJECTIVE】The optimization of microwave vacuum drying technology for Tremella fuciformis was studied. 【METHOD】A two factors quadratic regression general rotary unitized design was adopted to optimize the technology for Tremella fuciformis and the effect of microwave intensity and vacuum degree on drying time, rehydration ratio, Tremella polysaccharide contents and unit energy consumption were analyzed. Based the experimental data, the quadratic regression model of four indexes were established, then variables were analyzed with response surface methodology(RSM)，and evaluation function method was applied to optimize drying technology.【RESULTS】Microwave intensity and vacuum degree had significant influences on drying time, rehydration ratio, Tremella polysaccharide contents and unit energy consumption. The optimal microwave vacuum drying technology for Tremella fuciformis was determined as follows: microwave intensity was 10 W/g and vacuum degree was -90kPa.【CONCLUSION】These technology parameters could afford theoretical foundation for producing dried Tremella fuciformis of top quality.