Caminhos para a sustentabilidade: avaliação do composto orgânico em uma escola pública do semiárido.

Abstract

This research is based on a proposal for environmental education and soil education for an educational intervention project that recycles organic waste from a public school. The objective was to develop a composting process for organic waste resulting from the preparation of a school lunch in Patos-PB with the collaboration of students and teachers and to evaluate the quality of the compost generated. Initially, the organic leftovers from the preparation of school meals were separated for one week. A lecture was held addressing the themes: organic matter, composting and school lunch waste. Subsequently, a lixometer (a term used to draw the children's attention with the activity) was built to weigh the organic material for each day of the week with the students. Three buckets with a capacity of 15 kg each were used to make the compost, where they were drilled and overlaid. To complement the compost, soil, dry leaves and saw dust were used. The initial organic material weighed 3.525 kg, leaving 1.185 kg at the end of the research, with a reduction of 66% at 120 days. With the matured compound, chemical analysis was performed to observe the quality of the produced compound. It was concluded that the educative action was fundamental for the implantation of the compost in the school, having originated a substrate of good quality for plants, presenting contents of the C / N relation within the limits established by the legislation, for marketable organic compost.