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Previous issue date: 2012-12-28 / The sludge generated in stabilization ponds can be designed for various purposes,
among them we mention agricultural use, recovery of degraded areas and civil
construction. The choice of these alternatives should be made based on qualitative
and quantitative characteristics of the sludge. In this context, this study characterized
the digested sludge from an anaerobic lagoon in Cidade do Natal/RN, which deals
exclusively with residues of depleted septic tanks and pits. The sludge showed levels
of macro and micronutrients that confirm its potential for agriculture, with 139.49 g.kg
-1 organic matter, 15.40 g.kg-1 nitrogen and metal concentrations below those
required by Resolution No. 375/06 of CONAMA, besides the absence of fecal
coliform and less than 0.15 viable helminthes eggs/g, on average. The particle size
distribution showed that most of the particles have a diameter similar to the sand,
allowing the replacement of this input, for example. Analysis of the leachate and of
the sludge solubilized classified as non-inert and non-hazardous according to NBR
10.004/04. The volume produced in three years of operation by the pond was
1903.50m?, equivalent to approximately 400 kg of dry sludge. Overall, the
concentrations of the parameters were similar to literature, although none of them
addresses sludge anaerobic pond treating sewer from septic tanks and pits.The
sludgepresents technical feasibility to various types of use, however the cost of
dewatering and especially with transport can derail it. It needs to be made a more
thorough study of the costs to prove its economic viability / O lodo gerado em lagoas de estabiliza??o pode ser destinado para diversos fins,
dentre eles citam-se o uso agr?cola, a recupera??o de ?reas degradas e a
constru??o civil. A escolha dessas alternativas deve ser feita baseada nas
caracter?sticas qualitativas e quantitativas do lodo. Nesse contexto, esse trabalho
caracterizou o lodo digerido de uma lagoa anaer?bia na Cidade do Natal/RN, que
trata exclusivamente os res?duos esgotados de tanques s?pticos e fossas. O lodo
apresentou teores de macro e micronutrientes que confirmam seu potencial para a
pr?tica agr?cola, com 139,49 g.kg-1 de mat?ria org?nica, 15,40 g.kg-1 de nitrog?nio
e concentra??es de metais inferiores ?s exigidas pela Resolu??o n? 375/06 do
CONAMA, al?m de aus?ncia de coliformes termotolerantes e menos de 0,15 ovos de
helmintos vi?veis/g. em m?dia. As granulometria mostrou que a maioria das
part?culas tem di?metro semelhante ao da areia, permitindo a substitui??o desse
insumo, por exemplo. An?lises do lixiviado e do solubilizado classificaram o lodo
como n?o inerte e n?o perigoso, de acordo com a NBR 10.004/04. O volume
produzido em tr?s anos de funcionamento pela lagoa foi de 1.903,50m?, equivalente
a aproximadamente400 kg de lodo seco.De forma geral, as concentra??es dos
par?metros foram semelhantes ? literatura pesquisada, embora nenhuma delas
aborde lodo de lagoa anaer?bia tratando res?duos esgotados de tanques s?pticos e
fossas. O lodo apresenta viabilidade t?cnica para v?rios tipos de uso, por?m os
custos com desaguamento e principalmente com transporte podem inviabiliz?-lo. ?
necess?rio que seja feito um estudo mais aprofundado dos custos para atestar sua
viabilidade econ?mica
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/16004 |
| Date | 28 December 2012 |
| Creators | Assun??o, Marcella de S? Leit?o |
| Contributors | CPF:00871819406, http://lattes.cnpq.br/1925954531585024, Ara?jo, Andr? Luis Calado, CPF:37695045268, http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4799320A6, Mattos, Arthur, CPF:07431937849, http://lattes.cnpq.br/6925820345407676, Menezes, Carla Gracy Ribeiro, CPF:90456017453, http://lattes.cnpq.br/2018445505199119, Ingunza, Maria Del Pilar Durante |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-gradua??o em Engenharia Sanit?ria, UFRN, BR, Saneamento Ambiental; Meio Ambiente; Recursos H?dricos e Hidr?ulica |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | Portuguese |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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