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	Provedor de dados BABT (2) Autor Costa,Rejane Helena Ribeiro da (2) Wolff,Delmira Beatriz (2) Costa,Tatiana Barbosa da (1) Hoffmann,Heike (1) Ochoa,Juan Carlos (1) Paul,Etienne (1) Platzer,Christoph (1) Mais... Palavra-chave Nitrification (2) Activated sludge (1) Alkalinity (1) Denitrification (1) Hybrid reactor (1) Support (1) Wastewater treatment (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2007 (1) 2005 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Nitrification in hybrid reactor with a recycled plastic support material BABT Wolff,Delmira Beatriz; Ochoa,Juan Carlos; Paul,Etienne; Costa,Rejane Helena Ribeiro da. This work investigated the nitrification in a hybrid moving bed pilot scale reactor, which used a low density recycled plastic support material for biomass growth. The filling rate was 20% of its working volume (22L). The feeding and recirculation outflow was 45L/day. The reactor operated at a temperature of 16ºC, in two phases, according to the sludge retention time (SRT): A phase was 10 days and B phase was 3 days (average values). The applied average volumetric nitrogen and organic loads were 0.16KgTKN/m3.day and 1kgCOD/m³.day, respectively. The results showed an average nitrogen removal of 95% and average COD removal of 89%, in both A and B phases. Nitrogen removal rates were independents of the SRT. Tipo: Info:eu-repo/semantics/article Palavras-chave: Hybrid reactor; Nitrification; Support; Wastewater treatment. Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000400030 The potential of denitrification for the stabilization of activated sludge processes affected by low alkalinity problems BABT Hoffmann,Heike; Costa,Tatiana Barbosa da; Wolff,Delmira Beatriz; Platzer,Christoph; Costa,Rejane Helena Ribeiro da. In this study, the problems provoked by nitrification of wastewater with low alkalinity were analyzed in a pilot sequencing batch activated sludge reactor (SBR). Decrease in pH resulted in disappearence of protozoa. De-flocculation of the activated sludge floc started below pH 6.5, resulting in enhanced effluent turbidity and loss of bacteria. Nitrification efficiency was affected below pH 6.2. The denitrification activity was not sufficient to keep up the pH, due to a low C/N ratio of the wastewater. Based on alkalinity and ammonia concentration of the wastewater and the necessary denitrification rate to prevent operational problems, was developed a prognostic diagram. The applicability of this diagram was tested for the SBR with excellent results. The... Tipo: Info:eu-repo/semantics/article Palavras-chave: Alkalinity; Activated sludge; Nitrification; Denitrification. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000200018 Registros recuperados: 2 Primeira ... 1 ... Última

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