TITLE:
Water Quality Assessment of a Trout Farming Effluent, Bocaina, Brazil
AUTHORS:
Bernardo Pinto Caramel, Munique de Almeida Bispo Moraes, Clovis Ferreira do Carmo, André Martins Vaz-dos-Santos, Yara Aiko Tabata, João Alexandre Saviolo Osti, Carlos Massatoshi Ishikawa, Marcos Aureliano Silva Cerqueira, Cacilda Thais Janson Mercante
KEYWORDS:
Management, Feeding, Water Flow, Discharge, Phosphorus, Pollution
JOURNAL NAME:
Journal of Water Resource and Protection,
Vol.6 No.10,
July
30,
2014
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