Natto moisture content homogeneity improvement via containing trays topology modification in heat pump dryer

Several experiments were conducted in a drying chamber, with Natto as the test material. These experiments involved varying the number of trays and the angle of the trays to determine the most appropriate configuration, verify the uniformity of air distribution in the equipment, and evaluate the uniformity of the average moisture reduction of Natto seeds in each batch compared to the established theory in the previous study.