Monitoramento do ar intergranular do milho armazenado em silos bolsas de diferentes composições, na região Norte de Mato Grosso

Abstract

The growing increase in grain production, with records with each new harvest, automatically generates deficits in storage capacity, as investment in infrastructure does not keep up with what happens in the field at the same speed, so producers are forced to seek alternative ways to the custody of the products. In this sense, the bag silo has gained more and more space, due to the ease of logistics and cost-effectiveness. However, new products have been introduced in the market, with unknown answers about their use in the natural environment. The objective was to evaluate the intergranular conditions in the hermetic environment in two bag silos of different compositions. The study was carried out in the Middle-North region of the State of Mato Grosso, 2019/20 harvest in corn storage, between August and December. For monitoring, an automatic data acquisition system was created, connected to probes containing temperature and relative humidity sensors, positioned at different heights that were inserted into the grain mass. Thermoelectric Peltier insert plates were positioned next to the silos canvas, on the inside, to evaluate the heat flow. After collecting and refinement the data, a descriptive analysis was carried out. The bag silo of Special composition (canvas in external white and internal gray colors, with reduced thickness) presented better restriction to intergranular variations. On the other hand, the Standard bag silo (canvas in the colors white outside and black inside, standard thickness) showed better physical resistance to the weather in the region. For the analysis of condensation and intergranular air quality in bag silos, evaluations up to a depth of 15 cm of the mass are sufficient.