ment system
3) Third feature is the possibility of quick run-up treatment (to raise fruit temperature in short time). Quick run-up is not possible by the conventional treatments. When a long exposure treatment of 12 hours is satisfactory, any type of treatment is to be finished in 5 hours, however, aberrance in the warm-up speed of fruit temperature is unavoidable with the conventional methods of treatment. Also, it is entirely beyond hope to minimize the treatment time any further without recourse to the differential pressure treatment.