Descontaminação do efluente da ETE-UFRN via abordagem eletroquímica: avaliação da eficiência e toxicidade

• Autor(a) principal: Silva, Andreia Catherine Carvalho
• Data de Publicação: 2016
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UFRN
• Texto Completo: https://repositorio.ufrn.br/handle/123456789/38382
• topic: Tratamento de efluentes; Oxidação eletroquímica; DDB; DQO; Eletroquímica

The problem of reuse of urban water implies certain issues when it needs to meet human needs and protect the environment. Thus the effluent treatment has gained great attention in research as regards the destruction of pathogens and the reduction of organic matter from wastewater. The choice of treatment depends on the ease of control, reliability and efficiency of the treatment. In this context, this paper proposes using electrochemical technology as an alternative method for treating wastewater produced in UFRN, using the electrochemical oxidation to remove organic matter and aims to test the performance of Doped Diamond Electrode with Boro (DDB) and to evaluate the effects of different current densities and support electrolytes for the electrochemical oxidation of real samples of effluents generated in the sewage treatment plant at the Federal University of Rio Grande do Norte. The anodic oxidation experiments using BDD electrode, were made with a cell batch using 0.5L real effluent. In order to obtain the best conditions for this treatment were tested different current densities of 10 mA.cm-2:30 mA.cm-2 and added to NaCl and Na2SO4 as support electrolyte. The removal of organic matter by applying a current density of 10 mA.cm-2, using NaCl removal was 42.1% while, for the current density of 30 mA.cm-2 this result was about 47.5%. By using Na2SO4 and a current density of 10 mA.cm-2 to remove organic matter was 12.3% for current density of 30 mA.cm-2 this result was about 46.4%. The toxicity test using Lactuca sativa L. seeds was not conclusive, since there was 100% germination of seed does not allow an efficient monitoring of toxic compounds, there still growing at different levels so as root stem in germinated seeds.