Qualidade química na compostagem de alguns resíduos urbanos com inoculação biológica

Abstract

Composting is an efficient process for the stabilization of organic waste, it can be improved with the use of biological inoculant for use in organic farming. The objective was to evaluate a biological inoculant effect on chemical quality of compost produced from municipal waste and some evaluate the use of the compound in the rocket production. In the composting experiment used the completely randomized factorial 2x2, with two residues of high C / N ratio (sugar cane bagasse and leaves sweeping) and two levels of inoculation (with and without). Analyzed the concentrations of macro and micronutrients, C, pH and chemical oxygen demand in the compounds produced. In a greenhouse with a completely randomized design evaluated the production of fresh and dry rocket in different proportions (25%, 50% and 75%) of the compounds produced. The temperature and COD were the best indicators of the composting process of the materials tested in this study. For the conditions of this study, the biological inoculant tested did not alter the levels of macro and micronutrients, did not accelerate the composting process and not resulted in higher production of fresh and dry weight in the rocket cultivation.