PENGERINGAN BUNGA ROSELLA (HIBISCUS SABDARIFFA) MENGGUNAKAN PENGERING RAK UDARA RESIRKULASI

Abstract

Roselle (Hibiscus Sabdariffa) is one of the plants, including ornamental plants and herbs that are beneficial to prevent cancer, control blood pressure, blood circulation, and launched a bowel movement. Parts of this plant can be processed into useful products is Rosella flower petals. The purpose of this study was to determine the effective temperature and tray dryers which are effective for drying petals Rosella using recirculated tray dryer. These experiments used a temperature of 40, 50, and 600C as well as the location of the variable change tray into 1,2,3,4, 5 as a place to put Rosella flower petals. In this experiment, the drying rate constant (Constant Drying Rate) is not obtained, the obtained rate is falling rate. From the experimental results show that the greater the temperature, the greater the drying rate, so the time for the drying process is also faster. For the variable tray, Rosella flower petals are placed on tray 4 and 5 dry faster than those placed on the tray 1, 2, and 3.