Results of experimental research of a new installation for drying uncleaned rice grain

Abstract

Rice grown in Kyrgyzstan is characterized by a relatively high caloric value, contains many nitrogen-free extractive substances and niacin, and the protein contains quite a lot of essential amino acids. The protein content of rice produced in Kyrgyzstan is much higher, up to 13%, while according to the authors, in rice produced in the USA it is no higher than 7.5%, and the world standard for protein content in rice is 6.0%. Rice growing in the Uzgen region differs from other cultivation zones by a peculiar old grandfather’s technology of natural post-harvest handling which does not exist anywhere in the world; therefore, three types are obtained from one rice variety here: (white - beige; “zarcha” - light brown; and “dasta-saryk” - dark brown). They differ significantly from each other in quality indices and chemical composition. The final quality of rice is determined by post-harvest processes; by regulating the stages of post-harvest handling processes and their modes, it is possible to turn the quality, chemical composition and type of rice in one direction or another. Therefore, the development of technology and technical means for drying uncleaned rice grain, applicable to the natural and climatic conditions of Kyrgyzstan, is of great importance. In this regard, the analysis of drying methods used in Kyrgyzstan was conducted and, based on them experimental studies of chamber drying plants were conducted on which basis a new effective direction of chamber techniques for drying uncleaned rice grain is advised. The experimental studies show that under the existing natural and climatic conditions it is effective to use inexpensive chamber drying units, and to speed up the process, it is necessary to use modern solar panels.