Optimizations of Spray Drying Process Parameters for Liquorice (Glycyrrhiza glabra Linn.) Extract

Abstract

The objective of this work was to study the effect of spray drying process parameters on the physicochemical properties of liquorice (Glycyrrhiza glabra) extract. The stickiness and hygroscopicity are problems associated with spray drying process. To overcome these problems drying agents are used. Dextrose equivalent (DE12 and DE19) and maltodextrin are reported as drying agents in preparation of liquorice extract by spray drying method1. In present work, aerosil was used as spray drying agents. The inlet air temperatures, Feed flow rate and aerosil concentrations were considered as independent variables. Moisture content, % yield, bulk density, acidity and pH, hygroscopicity, time required for solubilization were analyzed to determine the effects of spray drying processing parameters. Increases in inlet air temperature were caused an increase in yield, solubility and a decrease in moisture content, bulk density, hygroscopicity. Increases in aerosil concentration caused an increase in yield and a decrease in moisture content, bulk density, hygroscopicity, time required for solubilization.