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Impact of drying deep beds of rice with microwave set at 915 MHz frequency on the rice milling yields
Innovative Food Science & Emerging Technologies ( IF 6.6 ) Pub Date : 2017-10-09 , DOI: 10.1016/j.ifset.2017.10.009
Deandrae L. Smith , Griffiths G. Atungulu

This study investigates the feasibility of achieving one-pass drying of high moisture content (MC) rice with microwaves (MWs) set at 915 MHz. Medium-grain rough rice at initial MC of 23% wet basis was dried using a MW dryer set to transmit energy at power levels 5, 10, and 15 kW for 4, 6, and 8 min for rice bed thicknesses of 5, 10 and 15 cm. Increasing MW specific energy up to 900 kJ/kg-grain resulted in increasing rice final surface temperature (FST) and drying rate which together had the effect of lowering the milled rice yield (MRY) and head rice yield (HRY). There was a statistically significant disparity in HRYs across the studied rice bed thicknesses. At the 10 to 15 cm (top) layer, the highest HRYs were observed (64.52%). The 0 to 5 cm (bottom) and the 5 to 10 cm (middle) layers had statistically similar mean HRYs that were both lower than the top layer.



中文翻译:

915 MHz频率微波干燥水稻深床对碾米产量的影响

这项研究调查了通过设置为915 MHz的微波(MWs)实现高水分(MC)水稻单程干燥的可行性。使用MW干燥机干燥初始MC为23%湿基的中粒糙米,以5、10和15的稻床厚度分别以5、10和15 kW功率传输能量4、6和8分钟。 15厘米 将MW比能提高到900 kJ / kg谷物会导致大米最终表面温度(FST)和干燥速率的提高,这一起降低了精米产量(MRY)和原米产量(HRY)。在整个研究稻床厚度中,HRY的统计差异显着。在10至15厘米(最上层),观察到最高的HRY(64.52%)。

更新日期:2017-10-09
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