Abstract:The main aim of this study is to study the effect of different drying systems drying temperature and plant layer thickness of the quality of dried basil. To achieve that studied the effect of drying systems (hybrid solar and oven drying) and different thickness layer (1, 2 and 3cm) on the weight loss, moisture content, drying rate and essential oil content. The accumulated weight loss of basil leaves ranged from 79.07 to 83.54 % for all treatment under study. The moisture content of basil leaves ranged from 37… Show more
“…Meanwhile, the lowest value of the marjoram oil content (1.07%) was found at the oven drying system at 70 °C. The trend of these results agreed with those obtained by Abd EL-All et al 36 . Figure 10 The essential oil content of marjoram leaves that dried in different drying systems and different drying temperatures.…”
Section: Resultssupporting
confidence: 92%
“…This can be explained by the fact that increased temperature and hot airflow inside the drying chamber increases mass and heat transfer, leading to sharper drops in moisture content. The trend of these results agreed with those obtained by Doymaz 35 and Abd EL-All et al 36 .…”
The main aim of this work is to study the main factors affecting the quality of the dried product and the energy requirements through optimizing these factors. To achieve that different drying systems (solar, hybrid solar and oven dryings), layers thickness (1, 2 and 3 cm) and drying temperatures (50, 60 and 70 °C) were used. The obtained results indicated that, the accumulated weight loss of marjoram leaves ranged from 73.22 to 76.9%, for all treatments under study. The moisture content of marjoram leaves ranged from 273.39 to 333.17, 258.02 to 333.04 and 269.38 to 324.90% d.b. for hybrid solar, oven and solar drying systems, respectively. The highest value of the drying rate of marjoram leaves (223.73 gwater kg−1 h−1) was obtained when the marjoram dried by oven drying system at 70 °C at 1 cm layer thickness. The highest values of the basil and marjoram oil content (2.91%) was obtained when the marjoram dried under sun drying system. The energy consumption for drying marjoram decreases with increasing drying temperature and layer thickness for hybrid solar and oven drying systems. The cost of dried marjoram dried under hybrid solar drying system was lower than those of oven drying system, the highest cost (13.48 LE kg−1) was obtained at a temperature of 50 °C and a layer thickness of 1 cm.
“…Meanwhile, the lowest value of the marjoram oil content (1.07%) was found at the oven drying system at 70 °C. The trend of these results agreed with those obtained by Abd EL-All et al 36 . Figure 10 The essential oil content of marjoram leaves that dried in different drying systems and different drying temperatures.…”
Section: Resultssupporting
confidence: 92%
“…This can be explained by the fact that increased temperature and hot airflow inside the drying chamber increases mass and heat transfer, leading to sharper drops in moisture content. The trend of these results agreed with those obtained by Doymaz 35 and Abd EL-All et al 36 .…”
The main aim of this work is to study the main factors affecting the quality of the dried product and the energy requirements through optimizing these factors. To achieve that different drying systems (solar, hybrid solar and oven dryings), layers thickness (1, 2 and 3 cm) and drying temperatures (50, 60 and 70 °C) were used. The obtained results indicated that, the accumulated weight loss of marjoram leaves ranged from 73.22 to 76.9%, for all treatments under study. The moisture content of marjoram leaves ranged from 273.39 to 333.17, 258.02 to 333.04 and 269.38 to 324.90% d.b. for hybrid solar, oven and solar drying systems, respectively. The highest value of the drying rate of marjoram leaves (223.73 gwater kg−1 h−1) was obtained when the marjoram dried by oven drying system at 70 °C at 1 cm layer thickness. The highest values of the basil and marjoram oil content (2.91%) was obtained when the marjoram dried under sun drying system. The energy consumption for drying marjoram decreases with increasing drying temperature and layer thickness for hybrid solar and oven drying systems. The cost of dried marjoram dried under hybrid solar drying system was lower than those of oven drying system, the highest cost (13.48 LE kg−1) was obtained at a temperature of 50 °C and a layer thickness of 1 cm.
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