Process Optimization of Ultrasound-Assisted Osmotic Dehydration of Yellow Cassava Using Response Surface Methodology

2020 ◽  
Vol 45 (3) ◽  
pp. 167-174
Author(s):  
Ayobami Olayemi Oladejo
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Process Optimization ◽  
Osmotic Dehydration ◽  
Ultrasound Assisted

scholarly journals Hybrid drying of ultrasound assisted osmotic dehydration (UOAD) and hot air drying of Eucalyptus deglupta

2021 ◽  
Vol 2120 (1) ◽  
pp. 012003
Author(s):  
R Sukumaran ◽  
B L Chua ◽  
N Ismail
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Bioactive Compounds ◽  
Osmotic Dehydration ◽  
Hot Air Drying ◽  
Air Drying ◽  
Constant Weight ◽  
Hot Air ◽  
Ultrasound Assisted ◽  
Drying Conditions

Abstract Eucalyptus deglupta is one of the promising medicinal plants from Mytracea family consisting of bioactive compounds that are to be used in medications. The bioactive compounds present in Eucalyptus deglupta were extracted at the best yield using a hybrid drying method consisting of ultrasound assisted osmotic dehydration (UOAD) and hot air drying in this study. The drying conditions of UAOD were optimised with response surface methodology (RSM) to attain the highest antioxidant activity via of DPPH radical scavenging assay. Four parameters were optimised with response surface methodology, namely concentration of sucrose (v/w), temperature (°C), duration of drying and intensity of ultrasound (%) ranged from 30% to 50%, 20°C to 60°C, 40 min to 100 min and 60% to 100%, respectively. A series of 27 combinations of the UAOD drying conditions were performed and followed by hot air drying performed at 60°C until a constant weight was achieved. A moderate scavenging activity of DPPH assay (56.12%) was achieved at a concentration of sucrose, temperature, duration of drying and intensity of ultrasound of 50%, 40°C, 100 min and 264 W, respectively.

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