• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 1
  • Tagged with
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Estudo de casos de wetlands construídos descentralizados na região do Vale do Sinos e Serra gaúcha / Study of cases of decentralized constructed wetlands in the region of the Sinos Valley and Rio Grande do Sul's Sierra

Timm, Jeferson Müller 20 March 2015 (has links)
Submitted by Maicon Juliano Schmidt (maicons) on 2015-06-05T13:18:40Z No. of bitstreams: 1 Jeferson Müller Timm.pdf: 22708335 bytes, checksum: 0e6767a349a961cd7763953f3abd4e6a (MD5) / Made available in DSpace on 2015-06-05T13:18:40Z (GMT). No. of bitstreams: 1 Jeferson Müller Timm.pdf: 22708335 bytes, checksum: 0e6767a349a961cd7763953f3abd4e6a (MD5) Previous issue date: 2015-03-20 / CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / PROSUP - Programa de Suporte à Pós-Gradução de Instituições de Ensino Particulares / Na busca por sistemas de tratamento de esgotos domésticos que atendam os princípios do desenvolvimento sustentável, os Wetlands Construídos apresentam-se como tecnologias de interesse. Esse trabalho avalia o desempenho de seis diferentes configurações de Wetlands Construídos descentralizados no tratamento de efluentes domésticos na região do Vale do Sinos e Serra gaúcha. Foram estudados dois wetlands de fluxo horizontal (WFH) comunitários, três wetlands de fluxo vertical (WFV) residenciais e um wetland de pré-tratamento com macrófitas flutuantes (WMF) Comunitário. Este trabalho avalia o desempenho dos sistemas, a eficiência na remoção da carga orgânica e desinfecção do esgoto frente à legislação, clima, cenário e condições de operação. Após 5 meses de monitoramento, todos os sistemas se mostraram eficientes na remoção da carga orgânica e turbidez, atendendo a legislação brasileira e apresentando concentrações médias na saída das unidades para DBO de 26,3; 12, 5 e 134,0 mg/L nos WFH, WFV e WMF, respectivamente. Em termos de DQO os resultados médios na saída das unidades foram de 160, 5 mg/L; 156, 5 mg/L e 134,0 mg/ L para os WFH, WFV e WMF respectivamente. Os WFH e WFV apresentaram remoção superior a 70% da carga orgânica mesmo nos sistemas saturados. Os WFV atenderam às necessidades de remoção da carga de nutrientes e apresentaram médias de 0,6 mg/L e remoção de 72% para fósforo total e 7,8 mg/L e 7,7 mg/L para nitrogênio total e amoniacal, respectivamente e remoção superior a 90% da carga nitrogenada. Os WFH não atenderam a legislação na remoção de nutrientes, diminuindo em média 39% da carga de fósforo, 52% de nitrogênio total e 37% de nitrogênio amoniacal, com médias de 5,8; 52,9 e 50,1 mg/L respectivamente no efluente tratado. Somente os WV1 e WV3 atenderam a legislação na desinfecção de E.coli e somente o WV3 para Coliformes Totais. O decréscimo de Coliformes totais foi de 73% nos WFH e 87% nos WFV, com médias na saída das unidades de 2,97E+04 e 3,38E+04 NMP/100 mL, respectivamente, nos WFH e WFV. Em termos de E. coli o decréscimo médio foi de 90% nos WFH e 84% nos WFV, com resultados de 2,86E+04 e 2,58E+03 nas saídas das respectivas unidades estudadas. Os fatores climáticos indicaram influência na dinâmica de funcionamento dos wetlands. Todos os WFV se mostraram efetivos para o fim a que se destinam e se mostraram adequados como sistemas de tratamento de esgoto on site. Os WFH evidenciaram a necessidade de um correto dimensionamento, acompanhamento técnico e manutenção dos sistemas coletivos. / In the search for treatment systems for domestic sewage that attend to principles of sustainable development, the Constructed Wetlands present itself as technologies of interest. This study evaluates the performance of six different configurations of decentralised constructed wetlands in domestic effluent treatment in the region of Sinos Valley and Rio Grande do Sul's Sierra. There were two community systems of horizontal flow (HFWs), three residential systems of vertical flow (VFWs) and a community system of pre-treatment with floating macrophytes (FMW). This work evaluates the performance of the systems, the efficiency in the removal of organic load and disinfection of sewage relative to legislation, climate, scenery and operation conditions. After 5 months of monitoring, all systems were shown to be effective in the removal of organic load and turbidity, attending to brazilian legislation and presenting mean concentrations at the outlet of the units for BOD of 26,3; 12,5 and 134,0 mg/L in HFWs, VFWs and FMW, respectively. In terms of COD average results in the outlet of the units were 160,5 mg/L; 156,5 mg/L and 234,2 mg/L for the HFWs, VFWs and FMW respectively. The HFWs and VFWs presented removing greater than 70% of organic load, even in saturated systems. The VFWs reached the needs of removing of nutrients load and presented an average of 0,6 mg/L and removal of 72% for total phosphorus, and 7,8 mg/L and 7,7 mg/L for total and ammoniacal nitrogen, respectively, removing over than 90% of nitrogen load. The HFWs operated with overload of application and did not attending the legislation in the removal of nutrients, decreasing on means of 39% of phosphorus load, 52% of total nitrogen and 37% of ammoniacal nitrogen, with averages of 5,8; 52,9 and 50,1 mg/L respectively in the treated effluent. Only the VW1 and VW3 attended to the legislation for the disinfection of E. coli and only the VW3 for total coliform. The mean removal of total coliforms was 73% in HFWs and 87% in VFWs, with means at the outlet of the units of 2,97E+04 e 3,38E+04 NMP/100 mL, respectively, in HFWs and VFWs. In terms of E. coli the average efficiency was 90% in HFWs and 84% in VFWs, with results of 2,86E+04 e 2,58E+03 in the respective outputs of the studied units. The climatic factors indicated influence in dynamic operation of wetlands. All VFWs were effective for the purpose for which it is intended and showed itself appropriate as systems of sewage treatment on site. The HFWs showed the need for a correct dimensioning, technical monitoring and maintenance of collective systems.

Page generated in 0.1045 seconds