Efeito da temperatura do ar e da massa de grãos na secagem de arroz irrigado

Abstract

The drying grain is one of the stages of pre-processing of agricultural products is intended to remove part of the water contained in them, so it is one of the most important factors to have a good quality beans in processing are humidity and temperature thereof . This study aim to evaluate the effect of air temperature and grain mass on the stationary drying and storage period for rice industrial performance. Rice grains were used (Oryza sativa L.) of fine long class, IRGA 424, which were produced in property located in the municipality of Itaqui in the West Frontier region of RS, 2014/2015 crop, harvested with the help of combine harvester with the approximate moisture content of 18%. It was used dryer type drawers samples, where the beans were dried by stationary drying method. In these drying temperatures were utilized grain mass 30°C, 34°C, 38°C, 42°C and 46°C, thus obtaining the desired grain moisture of 11.5%, commercially adequate moisture for the beneficiation product and get better yield of whole grains. To the process of grain yield was used ingenuity of evidence being analyzed three repetitions of 100g per studied temperature, being evaluated the percentage of whole and broken grains. The results show that drying using the 30°C range was 18 hours drying period and submitted longer than the other and elevated temperatures the drying cost around US $ 1,974.24, thus the cost 157% more than drying at 38°C, the temperature of 46°C had a shorter drying time than the others of 4 hours and showed the average yield of less than whole grains, around 60,64%, therefore the whole grain yield by 4.7% lower than 38°C. Regarding the temperature was 38°C showed that drying time of 7 hours with drying spent grain from R $ 767.76 and the average grain yield around 63,65% of whole grains, which for the processing presents great yield results for the industry.