Estudo numérico do comportamento da pluma de contaminantes em solo a partir de vazamento em lagoa de tratamento de esgoto.

Abstract

Lagoon of treatment of sewage are units built with the purpose of promoting the treatment of domestic and / or industrial effluents through the performance of microorganisms naturally present in the environment. Due to the large amount of organic and inorganic compounds present, as well as heavy metals, these are one of the main sources of contamination of soil and groundwater. In this sense, the present work aims to numerically simulate the fluid dynamics behavior of the copper contaminant plume (Cu) from the sewage treatment pond by using the ANSYS CFX 15.0 commercial package. Mass conservation, linear momentum and transfer of matter equations were simultaneously solved by adoption of monophasic and multi-component outflow, using the software ANSYS CFX® 15, considering a two-dimensional porous medium and with constant and uniformly distributed properties. Numerical results indicate that the behavior of the plume of contaminant is influenced by the speed of the water horizontally outflowing in a porous medium, and the permeability of the porous medium.