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Nitrogen removal in a shallow maturation pond with sludge accumulated during 10 years of operation in Brazil.
Rodrigues, V A J; Mac Conell, E F A; Dias, D F C; von Sperling, M; de Araújo, J C; Vasel, J L.
Afiliação
  • Rodrigues VAJ; Department of Sanitary and Environmental Engineering (DESA), Federal University of Minas Gerais, Av. Antonio Carlos 6627, Escola de Engenharia, Belo Horizonte, MG, Brazil E-mail: valeriasaneamento@gmail.com.
  • Mac Conell EFA; Department of Sanitary and Environmental Engineering (DESA), Federal University of Minas Gerais, Av. Antonio Carlos 6627, Escola de Engenharia, Belo Horizonte, MG, Brazil E-mail: valeriasaneamento@gmail.com.
  • Dias DFC; Department of Sanitary and Environmental Engineering (DESA), Federal University of Minas Gerais, Av. Antonio Carlos 6627, Escola de Engenharia, Belo Horizonte, MG, Brazil E-mail: valeriasaneamento@gmail.com.
  • von Sperling M; Department of Sanitary and Environmental Engineering (DESA), Federal University of Minas Gerais, Av. Antonio Carlos 6627, Escola de Engenharia, Belo Horizonte, MG, Brazil E-mail: valeriasaneamento@gmail.com.
  • de Araújo JC; Department of Sanitary and Environmental Engineering (DESA), Federal University of Minas Gerais, Av. Antonio Carlos 6627, Escola de Engenharia, Belo Horizonte, MG, Brazil E-mail: valeriasaneamento@gmail.com.
  • Vasel JL; Department of Science and Environmental Management, Unit of Environment and Sanitation, University of Liege, Campus Arlon, Arlon, Belgium.
Water Sci Technol ; 76(2): 268-278, 2017 Jul.
Article em En | MEDLINE | ID: mdl-28726693
Accumulated sludge in polishing (maturation) ponds reduces the hydraulic retention time (smaller useful volume), and this could potentially lead to a decrease in performance. However, settled biomass, present in the sediments, can contribute to nitrogen removal by different mechanisms such as nitrification and denitrification. This study investigated the influence of the bottom sludge present in a shallow maturation pond treating the effluent from an anaerobic reactor on the nitrification and denitrification processes. Nitrification and denitrification rates were determined in sediment cores by applying ammonia pulses. Environmental conditions in the medium were measured and bacteria detected and quantified by real-time polymerase chain reaction (real-time PCR). The pond showed daily cycles of mixing and stratification and most of the bacteria involved in nitrogen removal decreased in concentration from the upper to the lower part of the sludge layer. The results indicate that denitrifiers, nitrifiers and anammox bacteria coexisted in the sludge, and thus different metabolic pathways were involved in ammonium removal in the system. Therefore, the sediment contributed to nitrogen removal, even with a decrease in the hydraulic retention time in the pond due to the volume occupied by the sludge.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Esgotos / Poluentes Químicos da Água / Eliminação de Resíduos Líquidos / Nitrogênio País/Região como assunto: America do sul / Brasil Idioma: En Revista: Water Sci Technol Assunto da revista: SAUDE AMBIENTAL / TOXICOLOGIA Ano de publicação: 2017 Tipo de documento: Article País de publicação: Reino Unido
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Esgotos / Poluentes Químicos da Água / Eliminação de Resíduos Líquidos / Nitrogênio País/Região como assunto: America do sul / Brasil Idioma: En Revista: Water Sci Technol Assunto da revista: SAUDE AMBIENTAL / TOXICOLOGIA Ano de publicação: 2017 Tipo de documento: Article País de publicação: Reino Unido