Resumo

RIVERA GONZALEZ, Dayana et al. Application of solid by-product generated in fique's bagasse (furcraea macrophylla) anaerobic digestion for soil improvement. Rev. ion [online]. 2012, vol.25, n.1, pp.25-34. ISSN 0120-100X.

Fique's bagasse (Furcraea macrophylla) anaerobic digestion generate 0.3m³ CH₄/kg SV and 7L of sludge per kg of treated bagasse. The sludge can be applied in agriculture. The aim of this research was to produce a biosolid from sludge stabilized by alkali treatment and evaluates its remedial effect in a sandy loam soil of Mogotes - Santander. The methodology consisted in physicochemical and microbiological characterization of effluent sludge from fique's bagasse anaerobic digestion, followed by an alkaline stabilization process to obtain biosolids as byproduct and the evaluation as soil conditioner using Phalaris canariensis seeds. The seedling emergence, the height of plants and the change in soil nutrient composition were evaluated as response variables. According to levels of fecal coliforms, Salmonella, and helminth eggs, the biosolid can be applied without biological risk with the respective application restriction. As organic soil conditioner, it is used for the recovery of sterile ground deteriorated by fique's crops. The application of stabilized sludge in agriculture contributes to amendment of acidic soils and the reduction of environmental pollution.

Palavras-chave : biosolid; pathogens microorganism; sludge; soil amended; alkali treatment.

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