Detalhes bibliográficos
| Ano de defesa: |
2015 |
| Autor(a) principal: |
Cardoso Filho, Delcir Magalhães
 |
| Orientador(a): |
Almeida, Rogério de Araújo
|
| Banca de defesa: |
Almeida, Rogério de Araújo,
Gil, Eric de Souza,
Pasqualetto, Antônio |
| Tipo de documento: |
Dissertação
|
| Tipo de acesso: |
Acesso aberto |
| Idioma: |
por |
| Instituição de defesa: |
Universidade Federal de Goiás
|
| Programa de Pós-Graduação: |
Programa de Pós-graduação em Engenharia do Meio Ambiente (EEC)
|
| Departamento: |
Escola de Engenharia Civil - EEC (RG)
|
| País: |
Brasil
|
| Palavras-chave em Português: |
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| Palavras-chave em Inglês: |
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| Área do conhecimento CNPq: |
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| Link de acesso: |
http://repositorio.bc.ufg.br/tede/handle/tede/4784
|
Resumo: |
The pits and septic tanks wastes have high organic load, pathogens, metals and other elements, requiring appropriate treatment for not pollute the environment. Among the alternatives for their treatment, it has recently been proposed to use constructed wetlands. However, information on such use is scarce. Therefore, this study aimed to evaluate the performance of a constructed wetlands system using the Vetiver grass plant species (Chrysopogon zizanioides), on removing metals, P, S and Se from cesspools residues. Two tanks were constructed, dug into the ground (planted tank and control) and filled with a substrate consisting of gravel # 0, gravel # 1 and medium sand. The system built has operated under batch, with Hydraulic Retention Time of six days and subsurface vertical downward flow. Through obtained concentrations of different inorganic elements on: the applied cesspools residues; the treated effluent; the sludge accumulated at tanks surface and; the vegetal tissues, they were calculated: the total loads influent to the system; the output loads; the efficiency in removing attributes; the load accumulated at tanks surface; the load absorbed by macrophytes and; the loads retained in the roots and by the substrate. The attributes removal efficiency was calculated considering the evapotranspiration that showed an average rate of 40.27% in the Vetiver tank. The applied cesspools residues showed considerable variability in their concentrations. The concentrations of the treated effluent were subjected to Tukey test (α = 0.05). The effluents concentrations from Vetiver and control tanks statistically differed only for antimony, sulfur and iron, but the Vetiver grass showed removal efficiency greater than 20% to 30 of the 33 analyzed parameters. |
