Improved sanitary landfill design using recirculation of anaerobically treated leachates: generation of advanced design criteria
Electron. j. biotechnol
;
13(3): 9-10, May 2010. ilus, tab
Artigo
em Inglês
| LILACS
| ID: lil-577104
ABSTRACT
In Latin America, the most accepted disposal systems for Municipal Solid Waste (MSW) are landfills, which nowadays have low rates of stabilization. The objective of this study was to develop design criteria for sanitary landfills which lead to a reduction in the stabilization times of MSW, based on experiment results obtain from a pre-pilot scale operation of two sanitary landfills (0.5 Ton), one with recirculation of leachates treated in an anaerobic digester and the other with recirculation of untreated leachates. This was complemented by another pilot scale sanitary landfill (1440 Ton) with recirculation of leaches treated in an anaerobic filter, and additionally by a computer simulation of leachate generation through the water balance of a theoretical cell of MSW (850 Ton), in which the initial humidity of the MSW and the type of final cover were evaluated. The results obtained on the pre-pilot scale indicate that recirculation of anaerobically treated leachates, when compared to the recirculation of untreated leachates, increased the rate of MSW stabilization, projecting a stabilization time reduction of 72 percent. In the pilot sanitary landfill an increase in the settling rate of around 200 percent was observed when operating with the recirculation of anaerobically treated leachates as opposed to operation without recirculation. The water balance carried out on the theoretical cell of MSW demonstrated the importance to leachate generation of both the initial landfill water saturation and the type of final barrier. From these results it may be stated that it is important for landfill design to maintain waste humidity close to its field capacity along with an adequate leachate application rate.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Movimentos da Água
/
Aterros Sanitários
/
Eliminação de Resíduos
/
Gerenciamento de Resíduos
/
Estabilização da Matéria Orgânica
Tipo de estudo:
Estudo prognóstico
Idioma:
Inglês
Revista:
Electron. j. biotechnol
Assunto da revista:
Biotecnologia
Ano de publicação:
2010
Tipo de documento:
Artigo
/
Documento de projeto
País de afiliação:
Chile
Instituição/País de afiliação:
Pontificia Universidad Católica de Valparaíso/CL
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