Aproveitamento energético de biossólido industrial na produção canavieira

Abstract

Biosolid is a residue that can be used in agriculture for fertilizer purposes. Until 2010, this waste was mainly destined to landfills in Brazil. However, under Brazilian law 12,305 / 2010, which instituted the National Solid Waste Policy, the disposal of biosolids to landfills was prohibited. Biosolid is a residue rich in nutrients and organic matter, and can be used for fertilization in various crops. The present study seeks to understand the benefits that biosolids can bring to sugarcane, a culture that puts Brazil first in the world ranking of production. For this, an experiment was carried out at the experimental farm in the city of Pedras de Fogo-PB. The experimental design was a randomized complete block design, consisting of 6 (six) treatments: without fertilization, conventional fertilization, 1x, 2x, 4x and 8x the dose recommended by CONAMA Resolution 375/06, with three replicates each, totaling 18 (eighteen ) experimental plots. The variety RB 92579 of cane was used. In addition to the analyzes carried out directly with sugarcane, it was also sought to understand the effects that biosolids can add to the soil, investigating possible losses or physical-chemical gains and possible contamination by heavy metals. Considering the results obtained, it can be seen that the higher biosolids dosage resulted in significant gains from the point of view of ripening, biomass, and sugarcane production.