Aeração passiva na compostagem

Abstract

Composting is a procedure that aims to recycle organic material produced by farmers in poultry farming, with the potential to obtain a product with high levels of macronutrients and micronutrients, contributing to improvements in physical, chemical and biological properties by increasing the CEC (capacity of exchange of cations), favoring greater nutrient retention and water retention capacity. The increase in temperature during the composting process should be responsible for reducing the number of pathogenic microorganisms present. The objective of the work was to evaluate the influence of passive aeration treatment on composting. Three treatments were evaluated: 1st waste pile with material turning, 2nd static treatment without turning, 3rd passive aeration treatment, with tunnel and aeration chimneys. The temperature was measured biweekly with a rod thermometer with the help of a spade that cut a small hole 0.50 cm from the surface to measure the temperature. After two months, samples were taken to measure moisture content and N-P-K (nitrogen, phosphorus and potassium). No significant differences were observed for the evaluated parameters, except for the temperature in the last evaluation, in which the passive aeration treatment presented a lower temperature than the others