A compostagem como processo catalisador para a reutilização dos resídues de fábrica de celulose e papel
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Data
2003-05-01
Autores
Carvalho, Ana Gabriela M.
Guerrini, Iraê Amaral [UNESP]
Do Valle, Celina F.
Corradini, Lenine
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Resumo
Recognizing the great potential of this residue to increase the eucalyptus forests produtivity - when used in its humidified form - the main objective of this project was to decompose the solid residues generated at Luiz Antonio mill, in a fast and artificial way, by means of piles or ridges of composted materials. The materials used in this composting process were: activated sludge, dregs and grits, wood ash and biomass. Applications of both phosphorus and potassium have been used during the planting phase. Nitrogen, in the form of urea, has been applied in two treatments with the main purpose to decrease the C/N ratio and to speed up the decomposition process. The experiment was carried out in 120 days. The best results were obtained in residue piles with a 3:1 ratio, i.e., 75% residues + 25% biomass. This mixture provided an extremely good aeration, thus enabling an appropriate material mixing and homogenization. Under the technological viewpoint, the results obtained from the composting process were quite satisfactory for VCP industrial residues treatment. This composting process enabled a material accelerated stabilization (lower C/N ratio) and homogenization. After this experiment, it became possible to use all residues just as they were generated by Luiz Antônio pulp and paper mill. This project is of the utmost relevance to VCP's forestry department as far as a significant amount of nutrients is getting back to the soil in the form of mineral and organic materials.
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Palavras-chave
Activated sludge, Composting, Dregs and grits, Eucalyptus bark, Industrial residues, Pulp and paper mill residues, Wood ash, Activated sludge process, Biomass, Forestry, Productivity, Paper and pulp mills, Activated Sludge, Eucalyptus, Paper Mills, Pulp Mills
Como citar
O Papel (Brazil), v. 64, n. 5, p. 71-75, 2003.