JWARP  Vol.6 No.10 , July 2014
Water Quality Assessment of a Trout Farming Effluent, Bocaina, Brazil
ABSTRACT

The concern in mitigating the negative impact generated by the discharge of nutrients in the receiving water body is a challenge for the sustainable development of Brazilian fish farms. Thus, the purpose of this study was to evaluate the water quality and environmental impact caused by trout farming system effluent with focus on discharge of phosphorus. Sampling was performed on a weekly basis in triplicate from September to November 2010. Sample sites were distributed according to the water flow: upstream from trout farming system, water supply, effluent, artificial wetland, mixing zone and downstream (60 m from effluent). In the field, pH, conductivity, dissolved oxygen, water temperature and turbidity were measured. In laboratory, nitrogen and phosphorus series, chlorophyll a, total solids suspended and their organic and inorganic fractions were analyzed. For the good growth of trout in production system, the abiotic factors described in the water quality monitoring demonstrated acceptable values. Environmentally, after passing through the production system and artificial wetland, there was an increase in concentrations of total phosphorus, total nitrogen, orthophosphate, ammonium, chlorophyll a, total solids suspended and their organic and inorganic fractions (P < 0.05). These results are related with the quality of feed, feeding management and the inefficiency of the artificial wetland. Therefore, it is necessary to use best quality feed to meet the nutritional requirements of trout, maintaining an optimal feed conversion and reducing pollution generated by effluent.


Cite this paper
Caramel, B. , Moraes, M. , Carmo, C. , Vaz-dos-Santos, A. , Tabata, Y. , Osti, J. , Ishikawa, C. , Cerqueira, M. and Mercante, C. (2014) Water Quality Assessment of a Trout Farming Effluent, Bocaina, Brazil. Journal of Water Resource and Protection, 6, 909-915. doi: 10.4236/jwarp.2014.610086.
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