Effects of Spray-Drying Inlet Temperature on the Production of High-Quality Native Rice Starch

Processes

Kaiyang Lim¹  Jamie Boon Jun Tay¹  Sze Yu Tan²  Gomathy Sandhya Subramanian²  Wen-Ya Wu²  Esther Marie Jierong Lin²  Xinying Chua³  Cailing Ang⁴  Kelvin Kim Tha Goh⁴ 

[1] Chemical Engineering and Food Technology Cluster, Singapore Institute of Technology, 10 Dover Drive, Singapore 138683, Singapore;Institute of Materials Research and Engineering (IMRE), A*STAR, 2 Fusionopolis Way, Innovis, Singapore 138634, Singapore;Nagase Singapore Pte Ltd., 600 North Bridge Road, 11-01 Parkview Square, Singapore 188778, Singapore;School of Food and Advanced Technology, Massey University, Private Bag 11222, Palmerston North 4442, New Zealand;

关键词: waxy rice starch;    spray drying;    physicochemical properties;    pasting behavior;    particle size;    crystalline structure;   

DOI  :  10.3390/pr9091557

来源: DOAJ

【 摘 要 】

Rice starch is a common functional ingredient used in various food applications. The drying regime to obtain dry starch powder is an important processing step, which affects the functional properties of the starch. The application of extreme thermal treatment during the conventional drying process tends to elicit irreversible changes to the rice starch, resulting in the loss of desired functionalities. In a previous study, we reported the development of a novel low temperature spray-drying based process which efficiently dries waxy rice starch, while preserving its physicochemical properties and functionalities. This study, a follow-up to the previous report, evaluated the effect of different spray-drying inlet temperatures on the production yield, physicochemical properties, and functionalities of waxy rice starch. Increasing the inlet temperature from 40 °C to 100 °C resulted in an increase in the process yield from 74.83% to 88.66%, respectively. All spray dried waxy rice starches possessed a low moisture content of less than 15%, and a consistent particle size (median ~6.00 μm). Regardless of the inlet temperatures, the physicochemical functionalities, including the pasting characteristics and flowability, were similar to that of the native waxy rice starch. The molecular and A-type crystalline structure of the waxy rice starches were also conserved. An inlet temperature of 60 °C represented the optimum temperature for the spray-drying process, with a good yield (84.55 ± 1.77%) and a low moisture content (10.74 ± 1.08%), while retaining its native physicochemical functionalities and maximizing energy efficacy.

【 授权许可】

Unknown