Análise de resíduos estruturantes e recipientes para compostagem doméstica sem revolvimento

Abstract

This work proposes a methodology of home composting in which the waste is not mixed and the materials used are inexpensive. In this methodology, three containers (45, 70 and 135L) were tested along with the bulking agents (BA): grass, pruning and sawdust. Food waste was layered and covered by BA. In the tests, control units were included without the presence of BA. The variables measured were temperature, pH, electrical conductivity, organic carbon, total nitrogen and C/N. We verified that in 300 days the total mass acquired had homogeneous and satisfactory quality. In day 90, the bottom region of the containers was already decomposed and odorless. The best container, in operational terms, was 70L; however, the 135L reached better temperature results. Sawdust and pruning were the BA most viable, concerning final quality and operation. The smallest reduction in waste volume achieved was 83% at the end of treatment; therefore this method contributes to the management of municipal solid waste as an alternative to waste being sent to landfills or dumping ground.