Degradação de resíduos orgânicos por meio de processo de compostagem suspensa

Abstract

This study investigates the impact of aeration on the composting process, specifically comparing suspended and conventional composting methods. It examines how oxygen availability influences microbial activity, temperature regulation, organic matter decomposition rates, and the final compost quality. The research includes a literature review and an analysis of experimental data, focusing on parameters such as pH, electrical conductivity, moisture, C:N ratio, and temperature. The objective is to provide a practical and bibliographic reference for waste management professionals and researchers. The experiment involved two treatments—suspended and conventional composting piles—each with three repetitions, using urban tree pruning as a carbon source and fruit/vegetable waste as a nitrogen source. Samples were analyzed for 49 days. Results showed that while both methods maintained suitable pH (7.57-8.43) and moisture (50-60%) for microbial activity, neither reached the thermophilic phase. Suspended composting demonstrated greater efficiency in reducing the C:N ratio (from 119.65 to 50.33), suggesting that enhanced aeration significantly benefits organic matter degradation, although the final C:N ratio remained above ideal for mature compost.