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	Provedor de dados BABT (5) Autor Costa,Rejane Helena Ribeiro da (5) Wolff,Delmira Beatriz (2) Barthel,Lígia (1) Beltrame,Elpídio (1) Costa,Tatiana Barbosa da (1) Hoffmann,Heike (1) Medri,Waldir (1) Ochoa,Juan Carlos (1) Oliveira,Paulo Armando Victória de (1) Paul,Etienne (1) Platzer,Christoph (1) Ramos,Roberto (1) Seiffert,Walter (1) Silva,Júlia Santos (1) Vinatea,Luis (1) Mais... Palavra-chave Nitrification (2) Activated sludge (1) Alkalinity (1) Costs (1) Denitrification (1) Ecologic index (1) Effluent (1) Filtration (1) Hybrid reactor (1) Litopenaeus vannamei (1) Models (1) Optimisation (1) Oysters (1) Piggery waste (1) Plankton biomass (1) Ponds treatment (1) Sedimentation (1) Stabilisation ponds (1) Support (1) Swine wastes (1) Mais... Tipo do documento Info:eu-repo/semantics/article (5) Ano 2009 (1) 2008 (1) 2007 (1) 2005 (1) 2002 (1) País Brazil (5) Idioma Inglês (4) Português (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 5 Primeira ... 1 ... Última Modelling and Optimisation of Stabilisation Ponds System for the Treatment of Swine Wastes: organic Matter Evaluation BABT Costa,Rejane Helena Ribeiro da; Medri,Waldir. O modelo de produção adotado na suinocultura brasileira, principalmente na Região Oeste de Santa Catarina, é feita com os animais confinados em pequenas áreas, trazendo como conseqüência grande produção de dejetos. Este é diluído, através do uso de água para a limpeza das baias, aumentando seu volume. Seu lançamento nos cursos d’água da região está comprometendo a qualidade dos mananciais devido a contaminação bacteriológica e poluição por compostos químicos. Dessa forma, há necessidade de processos de tratamento para minimizar os problemas ambientais gerados por essa atividade. As lagoas de estabilização têm sido utilizadas, por apresentar um excelente desempenho quanto à eficiência de remoção da matéria orgânica, dos nutrientes e de coliformes fecais;... Tipo: Info:eu-repo/semantics/article Palavras-chave: Stabilisation ponds; Swine wastes; Costs; Models; Optimisation. Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000300017 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 Plankton biomass in secondary ponds treating piggery waste BABT Barthel,Lígia; Oliveira,Paulo Armando Victória de; Costa,Rejane Helena Ribeiro da. This study aimed at analyzing the plankton biomass found in a piggery waste treatment system, composed of a high rate algal pond (HRAP), two maturation ponds (MP1, MP2) (System A) and a water hyacinth pond (WHP) (System B). The ponds were disposed in series and the study was performed for 32 weeks. The physicochemical variables monitored were: pH, temperature, dissolved oxygen, soluble chemical oxygen demand, nitrogen compounds and total phosphorus. The plankton biomass was identified at genus level and the ecology index was calculated so as to describe its development in the ponds. Results showed lower specific richness, which was associated to the mono-specific Chlorella sp population. The protozoa density was conversely proportional to the green algae... Tipo: Info:eu-repo/semantics/article Palavras-chave: Ecologic index; Piggery waste; Plankton biomass; Ponds treatment. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000600025 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 Treatment of shrimp effluent by sedimentation and oyster filtration using Crassostrea gigas and C. rhizophorae BABT Ramos,Roberto; Vinatea,Luis; Seiffert,Walter; Beltrame,Elpídio; Silva,Júlia Santos; Costa,Rejane Helena Ribeiro da. Efficiency in removing particulate matter from Litopenaeus vannamei shrimp culture effluent was assessed in laboratory scale employing sedimentation and oysters Crassostrea gigas and C. rhizophorae filtration processes. Cylindroconical tanks (100 L) were used in duplicate for sedimentation and 50-L in triplicate for oyster filtration. Fifteen oysters of each species weighing 76-80 g were stocked in each of the filtration treatment experimental units (biomass of 1065 - 1174 g oyster per unit). The control treatment was a tank similar to those used in the filtration treatment but with empty oyster shells. Hydraulic retention time of the effluent was of 6 hours in each treatment. First, effluent went through sedimentation, and then the supernatant went... Tipo: Info:eu-repo/semantics/article Palavras-chave: Oysters; Filtration; Sedimentation; Effluent; Litopenaeus vannamei. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000300030 Registros recuperados: 5 Primeira ... 1 ... Última

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