Optimization of spray drying condition of Sikhye using response surface methodology

반응표면분석법을 이용한 식혜의 최적 분무건조 조건

  • 김기창 (농촌진흥청 국립농업과학원 농식품자원부) ;
  • 조인희 (농촌진흥청 국립농업과학원 농식품자원부) ;
  • 김경미 (농촌진흥청 국립농업과학원 농식품자원부) ;
  • 최송이 (농촌진흥청 국립농업과학원 농식품자원부) ;
  • 김진숙 (농촌진흥청 국립농업과학원 농식품자원부)
  • Received : 2015.07.28
  • Accepted : 2015.09.11
  • Published : 2015.10.30


Response surface methodology (RSM) is a statistical procedure frequently used for optimization studies. The purpose of this study was to determine the optimal spray drying condition for manufacturing Sikhye powder using RSM. Independent variables included the additive contents of maltodextrin (MD), inlet temperature, and velocity of sample feed velocity. The dependent variables were water uptake (g), solubility (%) and particle size (${\mu}m$). Regression models describing the changes of water uptake (g), solubility (%) and particle size (${\mu}m$) with respect to the independent variables were statistically significant with coefficients of determination, $R^2$, greater than 0.9. The results indicated that the inlet temperature of the spray dryer was the most important independent variable that affected the water uptake (g), while the additive content of MD and the sample feed velocity had maximum effects on the solubility (%) and particle size (${\mu}m$) of the Sikhye powder, respectively. The optimum final product was expected to have the lowest possible water uptake (g) and particle size (${\mu}m$) but the highest possible solubility (%). In conclusion, the best spray drying conditions were as follows: additive MD content, 22%; inlet temperature, $140^{\circ}C$ ; and spray dryer sample feed velocity, 51 mL/min.


Supported by : 국립농업과학원


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