Abstract
The aim of this study was to optimize the spray drying process for beetroot juice. Influence of feed flow rate (8, 10 and 11 mL/min), processing temperature (140, 150 and 160 °C) and maltodextrin concentration (20, 25, and 30%) on packed bulk density, moisture content and betalain content of beetroot powder were assessed using response surface methodology. The following optimum process parameters were determined; feed flow rate feed flow rate of 10 mL/min, processing temperature of 149 °C and maltodextrin concentration of 20%. The predicted values for packed bulk density, moisture content and betalain content were 0.62 g/mL, 6.12 and 33.84 mg/100 g of dry matter, respectively. Within the optimum parameters, the experimental values for packed bulk density, moisture content and betalain content were 0.62 ± 0.1 g/mL, 6.10 ± 0.1 and 33.14 ± 0.1 mg/100 gm of dry matter. The similarity of the experimental results to the predicted values verified the models.
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Singh, B., Hathan, B.S. Process optimization of spray drying of beetroot Juice. J Food Sci Technol 54, 2241–2250 (2017). https://doi.org/10.1007/s13197-017-2659-8
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DOI: https://doi.org/10.1007/s13197-017-2659-8