Technological advancements in millet dehulling and polishing process: An insight into pretreatment methods, machineries and impact on nutritional quality  

作　　者：Shagolshem Mukta Singh Jayasree Joshi T P.Srinivasa Rao 

机构地区：[1]Agricultural and Food Engineering Department,Indian Institute of Technology Kharagpur,Kharagpur,West Bengal 721302,India

出　　处：《Grain & Oil Science and Technology》2024年第3期186-195,共10页粮油科技（英文版）

基　　金：the Indian Institute of Technology, Kharagpur, West Bengal, 721302, for providing technical and financial support for the research。

摘　　要：Millets are widely recognized for their nutritional significance;however, the methods employed for their processing are currently lacking. This article primarily focuses on the advanced technologies and progressions in millet dehulling and polishing. These technologies operate based on the fundamental principles of compression-shearing, abrasion-friction, and centrifugal-impact forces. Processing of millets can be challenging because of the physical characteristics and tight attachment of hull and bran to the endosperm. However, several dehullers have been designed to solve this problem for different kinds of millets. In addition, the nutritional and anti-nutritional characteristics undergo alterations due to both dehulling and polishing processes. These alterations are thoroughly examined and discussed in this article. Specifically, anti-nutrients such as tannins and phytate are predominantly found in the outer pericarp of the grain and experience a reduction after undergoing dehulling and polishing. The nutritional properties are also subjected to a reduction;however, this reduction can be mitigated by subjecting the grains to certain pretreatments before dehulling and polishing. These treatments serve to enhance dehulling efficiency and nutrient digestibility while simultaneously reducing the presence of anti-nutrients. Novel thermal and non-thermal methodologies such as microwave, hydrothermal, high-pressure processing, and ohmic heating can be employed for processing millets, thereby diminishing the loss of nutrients. Additional research can be carried out to investigate their impact on the dehulling and polishing of millets.

关 键 词：MILLETS DEHULLING POLISHING PRETREATMENT Novel thermal and non-thermal techniques 

分 类 号：TS210.4[轻工技术与工程—粮食、油脂及植物蛋白工程]