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首页> 外文期刊>Journal of Cereal Science >Milling behavior and microstructure of rice dried using microwave set at 915 MHz frequency
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Milling behavior and microstructure of rice dried using microwave set at 915 MHz frequency

机译:使用微波炉频率铣削水稻碾磨行为和微观结构,如915 MHz频率

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In industrial milling of rice, the practice is to target certain degree of milling (DOM) which primarily depend on end-use requirement. Unlike convective heated air (CHA) drying, volumetric heating phenomenon which is associated with industrial microwave (MW) drying of rice at 915 MHz frequency could induce unique changes in rice microstructure; this is likely to impact the rice milling characteristics, especially the DOM. Medium grain rough rice at 24% moisture content (wet basis) at bed thicknesses of 0.01 and 0.05 m was dried in a one-pass, continuous drying operation for 8 min using pilot scale MW set at specific energy of 450, 600 and 750 kJ/kg. Samples from each treatment were milled for durations of 0, 15, 30, 45 and 60 s. The result shows that, more than 80% of the SLC were removed by 30 s of milling duration for both MW and CHA dried samples. Irregular and hexagonal structure typically alluded to starch granules reduced as the specific energy increased. At specific energy of 750 kJ/kg, the core of the MW dried rice kernel indicated features related to thermal decomposition. The study findings are crucial to determining MW drying condition that maintain the rice milling characteristics. (C) 2018 Elsevier Ltd. All rights reserved.
机译:在稻米的工业碾磨中,实践是针对一定程度的铣削(DOM),主要取决于最终使用要求。与对流加热的空气(CHA)干燥不同,与产业微波(MW)干燥的体积加热现象在915MHz频率下干燥水稻可以诱导水稻微观结构的独特变化;这可能会影响水稻铣削特征,尤其是DOM。在床厚度下24%的水分含量(湿基)在一次通过,连续干燥操作,连续干燥操作在450,600和750 kJ的特定能量下,在一次通过,连续干燥操作,在一次通过,连续干燥操作,在一次通过,连续干燥操作中,在床厚度为0.01和0.05μm的含水量(湿的基础)。 /公斤。将来自每种处理的样品研磨,用于0,15,30,45和60秒的持续时间。结果表明,对于MW和CHA干燥样品,通过30S铣削持续时间除去超过80%的SLC。通常以特定能量增加而均匀地暗示淀粉颗粒的不规则和六边形结构。在750 kJ / kg的特定能量下,Mw干稻内核的核心表明与热分解有关的特征。研究发现对于确定维持水稻铣削特性的MW干燥条件至关重要。 (c)2018年elestvier有限公司保留所有权利。

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