Avaliação de Hidrocarbonetos Policíclicos Aromáticos-HPAs derivados da queima de cavaco durante o processo de secagem do milho

Abstract

The pre-processing of agrigultural products has great importance in product quality. The most critical process is the drying of the grains, in which termal energy is required. Being that the direct burning of biomass produces Polycyclic Aromatic Hydrocarbons (PAHs), they that can be associated with carcinogenesis. The objective of the present work was to carry out an evaluation of presence of PAHs derived from the drying processo of corn that uses chip burning as fuel source. The experiment was carried out in the municipality of Cascavel - Paraná, in a stored unit located in Colônia Melissa. It was used a dryer model ADS 150, of column Kepler Weber, with capacity of 150t / h, with a chip burner brand IMTAB, with capacity of 8,000,000 kcal / h. For the assessment of the presence of PAHs was carried out the collection of corn samples at the entrance of the product in the storage unit (witness) and the collection of samples after the drying process with two passages in the dryer, was held for five days, hourly for eight hours per day, in the period of the harvest 2020. At the end of the day, the samples were homogenised, resulting in one sample per day. In the final total, the collection of samples resulted in 15 samples, 5 samples witnesses who did not go through the drying process, 5 samples that went through the dryer and 5 final samples that have undergone two passes through the dryer. All samples were analysed by the laboratory Analytical Quality Center in which used the AOAC/CR - 0007 20th Edition method, which found that none of the samples showed significant levels of PAHs. Thus, all the results obtained were below the detectable limit of 0,6 µg/kg. As there was no variance between the results was not performed statistic.It is concluded with this study that the corn drying process using wood chips in burners does not produce significantly, thus not affecting the quality of the grain.