Nombre: DOMÊNICO ANDREATTA
Tipo: MSc dissertation
Fecha de publicación: 16/05/2017
Supervisor:
Nombre |
Rol |
|---|---|
| PAULO SÉRGIO DA SILVA PORTO | Advisor * |
Junta de examinadores:
| Nombre |
Rol |
|---|---|
| RENATO DO NASCIMENTO SIQUEIRA | External Alternate * |
Páginas
Resumen: In this work, a cylindrical electro-flotation reactor was developed in a continuous regime in the treatment of oily water. The potential for the removal of emulsified oil and energy consumption was analyzed. The quality of the emulsion was determined by the characterization of the synthetic effluent as to its stability and distribution of the average size of oil droplets. With the help of free software imageJ 1.40, it was possible to determine the average droplet size. As the reactor operated continuously, tests were performed to evaluate the flow conditions. For this, the blue dye was injected before the entrance of the reactor to act as a marker. The increasing formation of the vortex was verified qualitatively when the reactor operated at higher flows without the presence of the electrodes. When the concave electrodes were placed inside the reactor and positioned near the entrance, this concavity contributed to the spiral movement. The experimental data were performed using the experimental planning technique, varying the flow, electric current and distance between electrodes. The interest is to evaluate the percentage of reduction of the content of oils and greases and the energy consumption aiming at the search for the best operational condition. In all experiments, samples were collected to determine the content of oils and greases (TOG) and the pH of the medium was measured. The electrodes were also evaluated in all the experiments by determining the electrode mass changes before and after the experiment, considering that the lost mass was converted to the Al3+ concentration released into the reaction medium. During the process of electro-flocculation it was possible to estimate the energy consumption. During the process of electro-flocculation it was possible to estimate the energy consumption. The planning technique contributed to obtain a simple linear model for both the oil removal percentage (R2 = 0.9935) and the energy consumption (R2 = 0.9452). It was concluded that this electrocoagulation reactor in the best operating condition evaluated presented an energy consumption of 4.07 Wh/4L, achieving a 89% oil removal efficiency that meets CONAMA technical standards (No. 430, 2014) .
