Compostagem orgânica no laboratório de Tecnologias Agroambientais UFCG-Campus I com foco nos objetivos do desenvolvimento sustentável.

Abstract

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