Enhancing rate of water absorption in seeds via a miniature surface acoustic wave device

Wong, K, Lee, L, Yeo, L and Tan, M 2019, 'Enhancing rate of water absorption in seeds via a miniature surface acoustic wave device', Royal Society Open Science, vol. 6, no. 3, pp. 1-11.

Document type: Journal Article
Collection: Journal Articles

Title Enhancing rate of water absorption in seeds via a miniature surface acoustic wave device
Author(s) Wong, K
Lee, L
Yeo, L
Tan, M
Year 2019
Journal name Royal Society Open Science
Volume number 6
Issue number 3
Start page 1
End page 11
Total pages 11
Publisher Royal Society Publishing
Abstract Seeds, which are high in protein and essential nutrients, must go through a hydration process before consumption. The ability to rapidly increase water absorption can significantly reduce the soaking time as well as the amount of energy needed for cooking seeds. Many studies in the literature employ high-power (102 W) low-frequency (104 Hz) ultrasound; although their results are very promising where more than 100% increase in water content can be obtained between the treated and untreated seeds, the high-power and low-frequency ultrasound often causes acoustic cavitation under high intensity, which can severely disrupt the cell walls and damage the seeds. In our study, however, we demonstrate that treating the seeds via a miniature surface acoustic wave device, which operates at low-power (100 W) and high-frequency (10 7 Hz) range, gives rise to a higher water absorption rate without the acoustic cavitations. By comparing the water content between the treated and untreated seeds, an increase of up to 2600% (for chickpeas) and 6350% (for mung bean) can be obtained after 60 min. A significantly higher water absorption in mung beans can be attributed to the larger pore size when compared with the acoustic wavelength in water, enabling an efficient transmission of acoustic wave inside the pores. Our results also indicate that the germination time can be reduced by half for treated seeds as compared to the untreated seeds.
Subject Chemical Engineering not elsewhere classified
Keyword(s) Acoustic streaming
Surface acoustic waves
Water absorption
DOI - identifier 10.1098/rsos.181560
Copyright notice © 2019 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.
ISSN 2054-5703
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