Optimization of frozen sour cherries vacuum drying process

► New vacuum dryer prototype was constructed and used in this investigation. ► Optimization of vacuum dried sour cherries aw value and total solids was done. ► In order to preserve anthocyanins and vitamin C process parameters were optimized. ► In order to preserve antioxidant activity process parameters were optimized too. ► Uniform temperature and pressure to obtain best dried product were determined.