A influência da salinidade nos processos de tratamento de efluentes por lodos ativados.

• Autor(a) principal: Santos, Luciana Silva dos
• Data de Publicação: 2012
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UERJ
• Texto Completo: http://www.bdtd.uerj.br/handle/1/10965
• topic: Environmental Engineering; Respirometry; Madoni s index; Biological treatment; Biological quality of the sludge; Oxygen uptake rate (OUR); Engenharia Ambiental; Respirometria; Índice de Madoni; Tratamento biológico; Qualidade biológica do lodo; Taxa de consumo de oxigênio (TCO); CNPQ::ENGENHARIAS

Effluent treatment process by sludge activated is one of the most used processes of treatment all over the world, mainly because of the quality of the final effluent. However, this process is a biological one, and so, it depends on the bacterial activity to the stabilization of the organic matter of the sewage. Considering this, it is necessary to maintain the ideal conditions to the survival and proliferation of the bacteria responsible for the process. This work considered two parameters to evaluate the influence of the salinity in the sludge activated processes; these parameters are widely used in research, however, little used for the monitoring of the Wastewater Treatment Plants. The objectives of this work are to investigate the influence of the salinity through the respirometry test and the biological quality of the sludge. The results of the metabolic activity are presented in graphics, in terms of Oxygen Uptake Rate and percentage of inhibition. The results of the biological quality are presented in numbers by 0 to 10 according to the Mandoni s Index (1994). The results show the intoxication of the sludge activated in saline concentrations higher than 5 g/L of NaCl in the saline shock, and it seems that efficiency do not get better even after 96 hours. The results suggests that the respirometry test and the biological quality test are efficient and complementary to the evaluation of salinity in the sludge activated processes.