Estudo geotécnico do uso de lodo de esgoto higienizado em camadas de cobertura de aterros sanitários
Giving the current trend of recycling and reutilization residues, sludge reuse has become an environmental, social and economic necessity. A possible destination would be the utilization of sludge as cover layer in sanitary landfills. This paper aimed at investigating whether the utilization of sewa...
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| Formato: | bachelorThesis |
| Idioma: | pt_BR |
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Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/40825 |
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| Resumo: | Giving the current trend of recycling and reutilization residues, sludge reuse has become an environmental, social and economic necessity. A possible destination would be the utilization of sludge as cover layer in sanitary landfills. This paper aimed at investigating whether the utilization of sewage sludge, as it’s done in other countries, is geotechnically viable to Natal’s reality. However, it is necessary that the materials used on those layers show some geotechnical properties to ensure its good operation. The sewage sludge of the UFRN’s WWTP was sanitized with the addition of 25% in dry mass of hydrated lime and held for 90 days in an agricultural greenhouse for its total stabilization. Then, geotechnical tests and analysis were done in the soil from the local sanitary landfill field, in the sludge itself and in three mixes between those materials. Results showed that, generally, the greater the sludge percentage in the mix, the smaller the resistance parameters, making the mixes lighter and more permeable. At the end, the conclusions were that the 10% sludge and 90% soil mix has shown geotechnical characteristics that allow its utilization in daily and intermediate cover layers. The sludge and the 50% sludge and 50% soil mix have shown geotechnical properties adequate for their utilization as component in draining sublayer in final cover layer. |
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