Name: DAMARIS VIEIRA
Publication date: 27/10/2022
Advisor:
Name |
Role |
|---|---|
| EDUARDO PERINI MUNIZ | Co-advisor * |
| PAULO SÉRGIO DA SILVA PORTO | Advisor * |
Examining board:
| Name |
Role |
|---|---|
| EDUARDO PERINI MUNIZ | Co advisor * |
| MARCELO SILVEIRA BACELOS | Internal Examiner * |
| PAULO SÉRGIO DA SILVA PORTO | Advisor * |
| RAQUEL MACHADO BORGES | External Examiner * |
Summary: Oily wastewater has been generated in large proportions by various industrial sectors.
This effluent contains concentrations of dispersed oil, grease and suspended particles
above the levels allowed by environmental control agencies. Due to the potential for
pollution of emulsified oil, due to its low degradability, its disposal in water bodies must
comply with the limits established by current environmental legislation. Therefore,
efforts have been directed towards removing oil from effluents using various types of
technologies. In this work, we intend to analyze the batch electrocoagulation
associated with magnetic separation in the treatment of a synthetic oil emulsion at a
concentration of 200 ppm. A complete 23
type factorial design of the experiments will
be performed. We want to evaluate the use of magnetic nanoparticles of cobalt ferrite,
associated with NaCl, as a potential electrolyte of the medium. The effects of the input
variables distance between electrodes, polarity inversion time and electrolyte
proportion will be evaluated in relation to the response variables. These are oil and
grease content, chemical oxygen demand, turbidity, aluminum content, electrode
consumption, energy consumption and operating cost. Preliminary experiments
showed the efficiency of the electrocoagulation technique in separating the oil and
water phases of the emulsion. Furthermore, it was observed in an initial test that only
cobalt ferrite conducts a low electric current in the medium, and the emulsion remains
turbid without the addition of sodium chloride. The magnetic field may favor the removal
of the supernatant sludge containing the magnetic particulate, as well as the removal
of the ferrite deposited at the bottom of the reactor.
Keywords: electrocoagulation, oily wastewater, magnetic separation, energy
efficiency.
