Consulta: creatorFacets:"Medri,Waldir"
Registros recuperados: 3
Data/hora: 10/06/2024 13:31:14

A Mathematical Model for the Removal of Organic Mater in Stabilization Ponds
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Medri,Waldir; Medri,Vandir.
This work presents an application to systemize the construction of ponds systems for treatment of domestic sewage. It consisted of two anaerobic ponds operated in parallel during May/97 to April/99. These were connected in series with a chicaned facultative pond. The treatment system was controlled with samples collected from the crude sewage (compound sample), in the affluents and effluents of the ponds and along the flux of the anaerobic and facultative ponds. The following parameters were analyzed: pH, Biochemical Oxygen Demand, Chemical Oxygen Demand, Total Solids, Sedimentable Solids, Total Coliforms, Oxygen Consumed in Acid Medium (OCAM) and temperature.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Stabilization ponds; Mathematical model; Optimization.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000100014

Growth of Nile tilapia Oreochromis niloticus fed diets with different levels of proteins of yeast
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Medri,Vandir; Medri,Waldir; Caetano Filho,Mauro.
This experiment was based on observations of 72 juveniles of Nile tilapia (Oreochromis niloticus), sexually reverted with an initial mean weight of 37.27 ± 4.92g, distributed in 12 cages of 100 l to evaluate the effects of the yeast inclusion as proteins source in the diet. The fishes were distributed in a completely randomized design with four treatments (0; 20; 40; and 60%) of yeast protein in substitution to the protein of traditional sources with three repetitions. Effects of the treatments were not observed (p &gt; 0.05) on the survival and to food conversion. It was observed a quadratic effect on weight gain (Y = 73.39 + 0.173X - 0.0034X²; R²= 0.9986). It was concluded the best level of yeast inclusion as source proteins in the diet for reversed Nile...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Yeast; Cages; Tilapia.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000300024

Modelling and Optimisation of Stabilisation Ponds System for the Treatment of Swine Wastes: organic Matter Evaluation
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: 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