Tratamiento de residuos orgánicos generados en el Bioterio de la Facultad de Ciencias de la Escuela Superior Politécnica de Chimborazo mediante compostaje.

Abstract

The present technical project was carried out with the aim of composting the solid waste organic generated in the biotherium of the Faculty of Sciences in mixture with manures of guinea pig and rabbits and organic residues of the polythenic dining room, which usually end in the Riobamba city dump. Two composting piles are assembled with this waste: Pile 1 waste in 3: 1: 3 proportion and Pile 2 waste in 3: 2: 5 proportion. The waste in the mixture was subjected to an aerobic decomposition process. Throughout the process temperature, humidity, pH, electrical conductivity, organic matter and aeration were controlled. The tipping was manual and was carried out according to the temperature. The biooxidative phase lasted six months and the maturation time was two months. The initial macronutrient content of pile 1 was: N 0.83% P 0.4665% and K 1.5265%, while that of pile 2 was: N 1.28%, P 0.8767% and K 1.9070%. at the end of the process values of N 1.70%, P 5.37% and K 2.02%, and N 1.52%, P 4.44% and K 1.81% were obtained for stacks 1 and 2, respectively, which denotes the concentration of macronutrients. In order to establish the absence of phytotoxic substances in the elaborate compost, the germination index was determined, the values of which, in both cases, exceeded 80%. Microbiological analyzes revealed the absence of Salmonella and Escherichia coli. It was based on these results the compost obtained can be used agricultural work as organic fertilizers rich in nutrients and as good structuring agents.