Banca de QUALIFICAÇÃO: JOSE WAGNER ALVES GARRIDO
Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.DISCENTE : JOSE WAGNER ALVES GARRIDO
DATA : 30/08/2019
HORA: 08:30
LOCAL: Sala do LAMTRE/CATRE
TÍTULO:
Treatment of produced water with synthetic combined technique flocculation/flotation and adsorption with charcoal vegetable.
PALAVRAS-CHAVES:
Effluent; Unit processes; Moringa oleifera; Waste; Contaminants
PÁGINAS: 147
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Química
RESUMO:
In the petroleum industry, in the segment represented by petroleum extraction, the most relevant pollutant, is the water produced, due to their complex chemical composition of contaminants and quantity generated that can vary considerably. The inadequate discard of this wastewater implicate environmental damage, penalties and negative repercussion on producing companies, contrary to environmental legislation present. In this context, the flotation technique has been quite used in the treatment of this effluent, in order to reduce the
Content of oils and greases, associating the pretreatment stage operation of flocculation. In order to improve the final quality of this effluent, is it necessary to have another phase of post-treatment, which can be the use of activated carbon adsorption processes, that has been
widely studied, to remove dissolved part of oil which has in its composition monoaromatic hydrocarbons such as benzene, toluene, ethylbenzene and xylene. In this case, this research proposed to perform the treatment of synthetic wastewater with flocculation/flotation technique and adsorption by activated carbon, with the combined application of flocculation/ flotation dissolved air, using natural flocculants obtained from the seeds of the plant Moringa oleifera. Such flocculants were obtained by protein fractionation with ammonium sulfate extractant, that went called of crude extract, fraction 1, fraction 2 and fraction 3. And for the adsorption study were used three types of carbons by-products obtained from this plant, being coal in-natura, which was chemically activated in two ways, employing the phosphoric acid and ammonium hydroxide reagents. The main techniques and the parameters considered to characterize such coals were: hydrogen potential, point of zero charge, basic and acidic functional groups, thermogravimetric analysis, differential thermogravimetric, x-ray diffraction, x-ray fluorescence, scanning electron microscopy and infrared spectroscopy. The experiments of removal of oils and greases with combined technique flocculation/flotation were performed according to factorial and central planning, through which he statically verified the influence of process variables for the three flocculants: flocculant concentration and flotation time. From the adsorptive and equilibrium study, it was found that fresh coal presented removal efficiency about 79.33% and the maximum benzene adsorption capacity was 65.07 mg.g-1, values considered high when compared to other adsorbents. While, the chemically activated carbons presented removal efficiency of 51.56 and 84.61% and maximum adsorption capacities of 50.59 and 78.89 mg.g-1, respectively, with similar equilibrium time of 20 minutes. The natural flocculants produced presented potential for removal of oil and grease, to the point of reach the environmentals requirements for discard this effluent in natural bodies of water. The rapid removal of benzene and the range of the equilibrium in a short period of time, when compared to other precursors, these results may be indications that flocculants and adsorbents of Moringa oleifera are viable and efficient, and can constitute a promising alternative or the treatment of industrial effluents, making the process more economical.
MEMBROS DA BANCA:
Externa ao Programa - 3141362 - ANITA MARIA DE LIMA
Presidente - 2275848 - ELISAMA VIEIRA DOS SANTOS
Externa à Instituição - EMILIANNY RAFAELY BATISTA MAGALHAES
Externo à Instituição - JANDUIR EGITO DA SILVA - IFAM
Externa ao Programa - 2668814 - MAGNA ANGELICA DOS SANTOS BEZERRA SOUSA