Análise Ecotoxicológica e Química da Estação de Tratamento de Efluentes de uma Indústria de Laticínios em Goiás
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Data
2011-08-26
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Universidade Federal de Goiás
Resumo
The dairy industries represent one of the most important sectors for the
economy of Goiás. The intense industrialization, together with the lack of
specialized labor, means that these industries generally produce without any
concern for the waste generated. Besides solid waste, these industries
generate effluents with high levels of pollution that can affect the water and
soil quality, in water bodies into which they flow. Faced with this scenario, the
need arose to carry out a study of the risks inherent to this type of effluent,
both from a physical-chemical and ecotoxicological point of view. For this
purpose, acute toxicity studies were carried out with the Zebrafish (Danio
rerio), to evaluate the toxicity of the effluents in pre-defined points of the
Wastewater Treatment Plant (WTP) analyzed (points A, D and F). To
evaluate the efficiency of the WTP, some physical-chemical parameters were
measured (pH, conductivity, cloudiness, BOD, COD, TS, OG among others),
and a chemical analysis was carried out of the metals Zn, Cd, Cu and Pb. To
determine the solid residues in the effluent, thermogravimetric analyses were
performed. Through mathematical models, the efficiency of the WTP was
evaluated in terms of the parameters measured, which throughout the
treatment process, proved inefficient, presenting mainly negative values. The
tests of acute toxicity carried out with the test organisms in contact with the
effluent from the dairy effluent, collected in various points of the plant,
enabled the LC50 to be calculated, which indicated a moderate to high
toxicity of the effluents analyzed.
Descrição
Citação
MACHADO, Victor Vinicius Batista. Análise Ecotoxicológica e Química da Estação de Tratamento de Efluentes de uma Indústria de Laticínios em Goiás. 2011. 117 f. Dissertação (Mestrado em Química) - Universidade Federal de Goiás, Goiânia.