Estudo da qualidade dos efluentes gerados em diferentes fases do cultivo do camarão-da-amazônia Macrobrachium amazonicum
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Data
2008-05-19
Autores
Nogueira, Mayra [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
Nas últimas décadas, a carcinicultura de água doce é um dos setores que mais cresceu dentro da aqüicultura. Muitas pesquisas têm sido realizadas a fim de buscar metodologias para se ter uma produção sustentável, ou seja, lucrativa e com baixo impacto ambiental. Neste contexto, o presente estudo analisou a qualidade da água de abastecimento e efluente em todas as fases do cultivo do camarão-da-amazônia, Macrobrachium amazonicum. Nas fases de larvicultura e berçário o sistema de cultivo adotado foi com recirculação de água e densidade de estocagem de 80 larvas/L e 7 pós-larvas/L, respectivamente. Foram realizadas análises microbiológicas representada pelo Número Mais Provável de Escherichia coZi e análises fisicas e químicas para a verificação de pH, temperatura, sólidos totais suspensos, demanda bioquímica de oxigênio, nitrogênio total, nitrito, nitrato, da água de abastecimento e efluente de 5 tanques de cultivo, em cada uma dessas fases. Na fase de crescimento final, foram analisados 12 viveiros de fundo natural, com fluxo contínuo de água e densidade de estocagem de 40, 60, 80 e 100 juvenis/m2, cujo delineamento experimental utilizado foi blocos inteiramente casualizados com 4 tratamentos e 3 repetições. Foram realizadas as mesmas análises microbiológicas, fisicas e químicas citadas nas fases de larvicultura e berçário, com o acréscimo nesta da análise de demanda química de oxigênio. Nesta fase, ainda realizou-se o balanço dos nutrientes: nitrogênio total, sólidos totais suspensos e demanda bioquímica de oxigênio para a obtenção de mais infonnações sobre o comportamento dessas variáveis na dinâmica dos viveiros. Em todas as fases, os resultados obtidos revelaram que a qualidade da água do efluente estava de acordo...
In recent decades, the freshwater carcinicultura is one of the sectors that more grew inside of the aquaculture. Many research have been carried out in order to develops methodologies for sustainable production, that is, lucrative and with low environrnent impact. In that context, the present study we analyzed the quality of the water of supply and effluent in alI the stages of the culture of the Macrobrachium amazonicum. In the stages of lavircultura and nursery the system of adopted culture was with recirculation of water and density of 80 stockage of larvae/L and 7 juveniles/L, respectively. Were conducted microbiological analysis represents for the number of Escherichia colí and physical and chemical analyses for the verification of pH, temperature, total suspended solids, biochemical oxygen demand, total nitrogen, nitrite and nitrate, of the water of supply and efluent of 5 tanks of culture, in each one of the stages. In the final stages of growth, 12 ponds of deep natural had been analyzed, with continuous flow of water and density of stockage of 40, 60, 80 and 100 juveniles/m 2, whose used experimental delineation was fulIy randomized blocks with 4 treatments and 3 repetitions. The same microbiological, physical and chemical analyses cited in the larvicultura and nursery had been carried out, with the addition in this of the analysis of chemical oxygen demando At this stage, was become balance of the nutrients: total nitrogen, suspended total solids and biochemical oxygen demand for the attainment of more information on the behavior of these variable in the dynamics of the ponds. At all stages, the results showed that water quality of the effiuent was in accordance with the current law and that did not have significant difference between the water and effluent... (Complete abstract click electronic access below)
In recent decades, the freshwater carcinicultura is one of the sectors that more grew inside of the aquaculture. Many research have been carried out in order to develops methodologies for sustainable production, that is, lucrative and with low environrnent impact. In that context, the present study we analyzed the quality of the water of supply and effluent in alI the stages of the culture of the Macrobrachium amazonicum. In the stages of lavircultura and nursery the system of adopted culture was with recirculation of water and density of 80 stockage of larvae/L and 7 juveniles/L, respectively. Were conducted microbiological analysis represents for the number of Escherichia colí and physical and chemical analyses for the verification of pH, temperature, total suspended solids, biochemical oxygen demand, total nitrogen, nitrite and nitrate, of the water of supply and efluent of 5 tanks of culture, in each one of the stages. In the final stages of growth, 12 ponds of deep natural had been analyzed, with continuous flow of water and density of stockage of 40, 60, 80 and 100 juveniles/m 2, whose used experimental delineation was fulIy randomized blocks with 4 treatments and 3 repetitions. The same microbiological, physical and chemical analyses cited in the larvicultura and nursery had been carried out, with the addition in this of the analysis of chemical oxygen demando At this stage, was become balance of the nutrients: total nitrogen, suspended total solids and biochemical oxygen demand for the attainment of more information on the behavior of these variable in the dynamics of the ponds. At all stages, the results showed that water quality of the effiuent was in accordance with the current law and that did not have significant difference between the water and effluent... (Complete abstract click electronic access below)
Descrição
Palavras-chave
Camarão de agua doce - Criação, Água - Qualidade, Efluente - Qualidade, Impacto ambiental, Macrobrachium amazonicum, Water quality, Effluents, Environmental impact
Como citar
NOGUEIRA, Mayra. Estudo da qualidade dos efluentes gerados em diferentes fases do cultivo do camarão-da-amazônia Macrobrachium amazonicum. 2008. xiii, 77 f. Tese (doutorado) - Universidade Estadual Paulista, Centro de Aqüicultura, 2008.