Avaliação do potencial agronômico de vermicomposto produzido a partir de lodo de esgoto doméstico

Abstract

O objetivo desta pesquisa foi avaliar o potencial agronômico de vermicomposto obtido a partir de lodo de esgoto doméstico e misturas de lodo de esgoto doméstico e solo, segundo os critérios do Ministério da Agricultura, Pecuária e Abastecimento (MAPA), visando ao seu uso sustentável, isto é, transformando um resíduo indesejável em um produto comercial com valor agregado. Os resultados obtidos para os vermicompostos produzidos, se comparados com as exigências de especificações, garantias e limites de contaminantes da resolução n 0 375, mostraram-se satisfatórios para pelo menos uma das misturas de lodo de esgoto doméstico e solo, evidenciando o potencial que este resíduo possui para ser utilizado como fertilizante ou condicionador de solos. Palavras-chave:Condicionador de solo, lodo de esgoto doméstico, vermicompostagem.Evaluation of the agronomic potential of vermicompost produced from domestic sewage sludge ABSTRACTThe main objective of this research was to evaluate the agronomic potential of the vermicompost produced from domestic sewage sludge and mixtures of domestic sewage sludge and soil, following the criteria of the Brazilian Ministry of Agriculture, Livestock and Food Supply (MAPA), aiming at a sustainable use for domestic sewage sludge, transforming an undesirable residue into a valuable commercial product. The results obtained for the so produced vermicomposts, in comparison to the specifications, warranties and contaminating limits requirements of the resolution No. 375, were satisfactory for at least one of the domestic sewage sludge and soil mixtures, proving the potential of this residue for application in agriculture as fertilizer or soil conditioner.

Chemical characterization of vermicompost of sewage sludge with different proportions of diatomaceous material

“…Dores-Silva et al (2011a, 2011b highlight that, in the vermicomposting process, part of the organic C starts to participate in the earthworm biomass and another Lopes et al (2008) indicate a value of organic C above 25% as ideal for substrates, and the generated vermicompost is slightly above the proportion considered as adequate. For the nutrients Mg and S, the contents did not change with the increment of DE, despite the low Mg content in the DE (Table 1).…”

Crambe wastes vermicomposting in arugula seedlings production

“…Therefore, it has high water retention capacity. In a study by Silva et al (2011), when vermicomposting was applied in domestic sewage sludge with different soil concentrations, vermicomposting final humidity of 38,55% was obtained in the treatment with 100% domestic sludge; 32,19% in the treatment with 75% sludge and 25% soil; and 25,22% in the treatment with 50% sludge and 50% soil. It was observed that, in the extent to which soil concentration increased, moisture decreased.…”