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June 30, 2021
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August 30, 2021
Published
December 9, 2021
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Abstract

Drying experiments were conducted on coriander leaves as affected by drying methods (solar greenhouse drying and open sun drying), pretreatments (dipping in a solution of magnesium chloride + sodium bicarbonate + potassium metabisulphite, boiled water blanching containing sodium metabisulphite, and untreated), and loading densities (2.0, 2.5 and 3.0 kg/m2). Validity of three commonly used drying models were examined to predict the most suitable drying model for coriander leaves. The increased drying temperature under solar greenhouse dryer (42°C) increases the amount of moisture removal from the coriander leaves and reduces the drying time by increasing the drying rate as compared to open sun drying (29°C), at all the selected levels of pretreatments and loading densities. Chemically treated coriander leaves dehydrated under a solar greenhouse dryer required less drying time than other treated leaves and dried leaves. Nevertheless, drying methods and loading densities had significant effects, while treatment effects were marginal. It was found that reduction of moisture and moisture removal rate per unit time occurred mostly in the falling rate period except some accelerated removal of moisture at the beginning up to 150 minutes. Page's model was found most appropriate for drying coriander leaves among the selected models.

Keywords

Coriander Solar greenhouse dryer Drying rate Moisture Drying model

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Singh, S. K. ., Samsher, Singh, B. ., Senger, R., Kumar, P. ., & Amit Kumar Patil. (2021). Drying characteristics and prediction of best fitted drying model for coriander leaves. Environment Conservation Journal, 22(3), 243–251. https://doi.org/10.36953/ECJ.2021.22329
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