SILVA, G. G.; http://lattes.cnpq.br/1872333500933742; SILVA, Gilberlando Gomes da.
Resumo:
Composting is a technique used for recycling organic material by aerobic, controlled
decomposition, with the objective of obtaining a stable, sanitized product, rich in humic
compounds and whose use in the soil does not pose risks to the environment. The quality of the
compost produced is associated with some factors such as a good relationship between macro
and micronutrients, pH, humidity. Furthermore, the success of the composting process is
directly associated with the amount of compost produced (QCP), which is summarized in the
final yield. The objective of this work was to analyze the organic compost produced in the
Laboratory of Agroenvironmental Technologies UFCG - CAMPUS I in a quantitative and
qualitative way with a focus on achieving the Sustainable Development Goals - SDGs 2, 12 and
15. For this, factorial experimental planning was used. central compound, 22+3, analyzing the
effects of the independent variables: overturning and inoculant on the dependent variable QCP.
During composting to analyze performance, temperature, humidity and pH were monitored. In
addition, chemical analysis, organic carbon, nitrogen, potassium, phosphorus, calcium,
magnesium, sulfur, copper, zinc, iron, manganese and boron, and physical, temperature, pH and
humidity measurements were carried out to evaluate the product. Finally, the composted
product was quantified, reaching the yield. Through the experimental design, an adjusted and
predictive model was achieved for the determination of the dependent variable, QCP. In this
model, the measured and calculated value presented a minimum error of around 2.51%. This
model is statistically significant and predictive and can be used to reach an estimate of the yield
(QCP) of composting. The maximum yield was reached with the inoculant variable at its upper
level, 32.4kg, and the turning variable at the lower level, 7 days. The witness windrow did not
present evidence of the composting process after 105 days. The maximum yield achieved was
73.9%. This work can contribute to achieving goals established by the Sustainable
Development