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Provedor de dados:  Ciência e Agrotecnologia
País:  Brazil
Título:  Contribution of organic bulking materials on chemical quality of sewage sludge vermicompost
Autores:  Hashemimajd,Kazem
Jamaati-e-Somarin,Shahzad
Data:  2011-12-01
Ano:  2011
Palavras-chave:  Vermicompost
Sewage sludge
Bulking materials
Heavy metals
Eisenia foetid
Resumo:  Vermicomposting is at suitable methods for stabilization and converting of sewage sludge into useful products. To investigate the effects of bulking material on vermicompost quality, an experiment was conducted in a factorial design with three replications. In this experiment, the final dried sludge in lagoons was mixed with bulking materials (woodchips, three leaves, and wheat straw) in four mixing proportion with swage sludge (0, 15, 30 and 45%, V/V). Chemical properties of bulking materials, sewage sludge, and produced vermicomposts were determined. Vermicomposts had relatively low pH and electrical conductivity (EC). The nutrients content of vermicompost, especially N, P, Fe, and Zn, were high. These properties showed its suitable quality for use in agriculture. Heavy metals concentrations of vermicomposts, except Zn, were lower than recommended values by EPA. Mixing of Bulking materials with sewage sludge decreased pH, N, Pb, Co, and Cd, but increased Ca, Mg, Fe, Cu, Mn, Zn, and Ni content of produced vermicomposts. In most cases, the concentrations of nutrients were higher in 30% mixing proportion. Therefore, 30% (v/v) mixing of bulking material with sewage sludge is recommended for vermicompost production.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Identificador:  http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542011000600006
Editor:  Editora da Universidade Federal de Lavras
Relação:  10.1590/S1413-70542011000600006
Formato:  text/html
Fonte:  Ciência e Agrotecnologia v.35 n.6 2011
Direitos:  info:eu-repo/semantics/openAccess
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