Continuous low-temperature spray drying approach for efficient production of high quality native rice starch

Tay, Jamie Boon Jun; Chua, Xinying; Ang, Cailing; Goh, Kelvin K.T.; Subramanian, Gomathy Sandhya; Tan, Si-Hui; Lin, Esther Marie Jierong; Wu, Wen‐Ya; Lim, Kaiyang

doi:10.1080/07373937.2021.1874967

Cited by 9 publications

(8 citation statements)

References 31 publications

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“…The protein contents (dry basis) of all of the spray-dried waxy rice starches were found to be less than 1%, comparable to commercial rice starches [1]. Similar results were observed in our previous studies, where changes in drying strategies had no significant impact on the protein content [11]. The results and published literature showed that the protein content is reliant on the efficacy of the prior alkaline steeping process that is intended to remove protein, rather than the subsequent drying process.…”

Section: Physical Properties Of Spray-dried Waxy Rice Starchsupporting

confidence: 89%

“…There were significant increases in the peak, breakdown and final viscosities as compared to the native rice starch. These differences could be attributed to minute changes in the starch, which include leaching of amylopectin and the formation of minute fissure cracks on the granule surface during the process of oven drying [11]. The findings further supplement the hypothesis that the drying process can have a significant effect on the resultant starch properties and functionalities.…”

Section: Pasting Behavioursupporting

confidence: 61%

“…Generally, all spray-dried waxy rice starches possessed poor flowability, as reflected in the high Hausner Ratio (HR) and Carr's Index [19]. Similar results were reported for waxy rice starch dried using other methodologies, such as oven drying and freeze drying [11]. Rather than being due to the effect of drying methods, the poor flow properties could mainly be attributed to the inherently small particle sizes (5.61 µm to 6.12 µm) of waxy rice starches.…”

Section: Physical Properties Of Spray-dried Waxy Rice Starchsupporting

confidence: 56%

“…Low temperature spray drying was proposed as an alternative method for drying rice starch in a previous study [11]. This study evaluated the effect of different spraydrying inlet temperatures (40 • C to 100 • C) on various aspects, such as the physicochemical properties and functionalities of waxy rice starch.…”

Section: Discussionmentioning

confidence: 99%

“…Due to its mechanism, the spray drying process offers various advantages, including continuous processing, uniform particle quality and lower exposure to thermal conditions. In a previous study, we demonstrated the feasibility of using a low-temperature spray-drying process to effectively dry rice starch [11]. Following our previous report, this study examined the effect of the spray-drying inlet temperature on the resultant waxy rice starch.…”

Section: Introductionmentioning

confidence: 90%

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

Tay

Chua²,

Ang

et al. 2021

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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.

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Section: Physical Properties Of Spray-dried Waxy Rice Starchsupporting

confidence: 89%

Section: Pasting Behavioursupporting

confidence: 61%