الفهرس 
Drying processOnly 14 pages are availabe for public view
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Abstract
three drying methods oven drying (40, 50, 60 and 70 oC), microwave drying (180 360 540, 720 and 900 watt) and direct solar drying were used for drying mint leaves and ginger with three levels of load (5, 1.25 and 0.5 kg / m2) for mint and four levels of thicknesses(0.5, 1, 1.5 and 2cm ) for ginger. the drying characteristics and the quality aspects of the dried mint leaves and ginger were studied.
from initial moisture content (7.65 g. w./g. d. m.) to achieve the equilibrium moisture content The lowest drying time was 5 and 14 minutes, respectively, during the drying microwave when power is 900 and 720 Watt with load level 0.5 kg / m2 , and the thickness 2 cm of ginger and the highest time took in dried (mint and ginger) was 20 and 72 hours during drying oven at temperature of 40 oC and the loading rate 5 kg /m2. And 2 cm thickness of ginger., were consuming less energy in drying mint and ginger respectively 0.405., 1.134 MJ. Using microwave at 900 720 Watt and loading rate of 0.5 kg / m2 of mint and 0.5 cm thickness of ginger and higher Energy 48.678, 75.103 MJ using the oven when the temperature is 40 oC and load of 5 kg/m2 of mint and 2 cm thickness of ginger, the highest efficiency was 64%, of mint in oven at 70 oC, with loading rate 5 kg/m2 and 78 % of ginger in microwave drying at 900 and 720 Watt with thickness 2 cm.
The amount of oil in the fresh mint leaves was 1.116 ml grams per 100 grams of dry matter, The results showed that drying of the mint leaves at temperature 50 oC with loading rate 1.25 kg/m2 was the best treatment from all treatments were studied in this work to getting the highest amount of essential oil0.68 ml grams per 100 grams. The amount of chlorophyll (a, b) in fresh mint leaves was 42 and 24 ml g / liter and the highest amount of chlorophyll (a, b) for dried mint leaves was 26 and 12 respectively was when drying microwave-powered
540 Watt. The highest phenol content in dried ginger by microwave was 0.72 mg / g solid material at 900 watts with thickness 1.5 cm., And the lowest value for phenol was 0.017 mg / g solid material when using oven drying at 70 C with thickness of 0.5 cm. Midili - kucuk, model adequately described the oven and solar drying behaviors, logarithmic model adequately described the microwave drying behaviors for mint leaves and logarithmic model adequately described the oven and solar drying behaviors and verma et al model adequately described the microwave drying behaviors for ginger.