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Provedor de dados:  BABT
País:  Brazil
Título:  The Influence of Stirring Speed, Temperature and Initial Nitrogen Concentration on Specific Anammox Activity
Autores:  Martins,Tiago H.
Souza,Theo S.O.
Varesche,Maria Bernadete Amâncio
Data:  2017-01-01
Ano:  2017
Palavras-chave:  SBR
Ammonium
Nitrite
Specific anammox activity
Anammox
Resumo:  ABSTRACT This study evaluates the influence of initial nitrogen concentration, temperature and stirring speed on specific anammox activity (SAA). The biomass was tested in single batch reactors with different initial nitrogen concentrations (Assay 1) ranging from 60 to 140 mg Ntotal/L in equimolar ratio (NO2--N/NH4+-N) and in another test to 67.3 mg NH4+-N/L and 92.2 mg NO2--N/L (close to anammox stoichiometric ratio). The anammox biomass was also tested in single batch at different temperatures (from 20 to 37° C) to determine the short-term effects on SAA (Assay 2). In the third assay the stirring speed ranged from 50 to 150 rpm in a sequencing batch reactor (SBR) at 37 ºC. SAA was affected by the stoichiometric molar ratio but not by equimolar initial concentrations. The maximum specific anammox activities were 26.2 mg NH4+-N/g VSS.h in the single batch reactor at 37 ºC with NO2--N/NH4+-N stoichiometric ratio and 33.5 mg NH4+-N/g VSS.h in the SBR at 37 ºC and 50 rpm. The NO2--N/NH4+-N molar ratio affected specific anammox activity, and SAA showed to be more hindered by low increases of stirring speed than reported in the literature.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Identificador:  http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132017000100453
Editor:  Instituto de Tecnologia do Paraná - Tecpar
Relação:  10.1590/1678-4324-2017160421
Formato:  text/html
Fonte:  Brazilian Archives of Biology and Technology v.60 2017
Direitos:  info:eu-repo/semantics/openAccess
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