Optimization of explosion puffing drying for muskmelon by response surface methodology

In order to optimize the explosion puffing drying technology of muskmelon, single factor experimental design was used to analyze the effects of 3 variables including pre-drying time, expanded temperature and evacuated time on the hardness, brittleness, moisture content and color, and technological parameters were optimized through response surface experiments.Two regression models describing the 4 indexes were derived according to the experimental data.The optimal process conditions for the puffing drying were pre-drying time of 207 min, expanded temperature of 84.5 ℃, evacuated time of 64.5 min.Under these conditions, the extruded products' hardness is 412 g, brittleness value is 4, moisture content is 10.28%, chromatic aberration value is 8.4, the fitting degree is good, and the product quality is excellent.