997 resultados para Sedimentacao : Aguas rasas


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The wastewater discharge produces impacts on receiving water bodies. Nutrients as P produce implications on lentic systems because they accelerate the eutrophication processes. Several technologies for P removal from the wastewater have been used: physic chemical treatment systems with important effects by coagulant products addition; biological processes based on anaerobic and aerobic conditions with great implications on the required volume; natural systems as stabilization ponds and irrigation require bigger areas and post-treatment processes. The aerobic fluidized bed reactors with internal circulation (AFBRIC) are compact options with high concentrations of active biomass that have demonstrated their capacity for organic matter and N removal. For sewage from the wastewater pumping station of Ilha Solteira city and effluents of a recirculation aquaculture system (RAS) for semi-intensive tilapia farming, the reactive P and total P removal efficiency in three AFBRIC with 250 mm external tube diameter and different internal tube diameter (ITD), for two different support media at different concentrations was evaluated. The average reactive P removal efficiency for domestic wastewater to hydraulic retention time (HRT) of 3 hours and 125 mm ITD reactor varied from 25,6 to 38,4% and with 150 mm ITD reactor varied from 27,5 to 32,5%; the average total P removal for the RAS wastewater at a HRT of 0,19 hours and 100 mm ITD was of 32,7%.

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El estudio abarca el análisis de las nuevas legislaciones de aguas adoptadas en América Latina durante la década 2005-2015 (Venezuela, Nicaragua, Paraguay, Perú, Honduras, Argentina y Ecuador). Con ese objetivo se revisa la evolución reciente del derecho de aguas, el movimiento de reformas tanto como la consideración de aspectos cruciales de su efectividad en el contexto regional donde se advierte su relativa ineficacia y grandes dificultades para su aplicación por parte de gobiernos. Los estatutos se revisan en su propio contexto constitucional, y conforme el sentido de su estructura pero favoreciendo la comparación entre ellos.

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Pós-graduação em Ciência e Tecnologia de Materiais - FC