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Previous issue date: 2016-07-29 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / A ind?stria de petr?leo ? um dos setores com maior potencial de degrada??o ambiental, sendo a ?gua produzida o res?duo mais relevante. A complexa composi??o qu?mica e o elevado volume gerado deste efluente exigem um rigoroso controle e gerenciamento. Assim, antes de ser descartada, reinjetada em po?os ou para outra finalidade esta ?gua deve ser tratada de acordo com a legisla??o ambiental vigente. No que se refere ao tratamento de ?gua produzida para remo??o do teor de ?leos e graxas, a t?cnica combinada flocula??o/flota??o por ar dissolvido vem sendo bastante estudada. Na etapa de flocula??o vem sendo utilizado floculantes qu?micos convencionais de elevado custo e n?o-biodegrad?veis. Nesse contexto, avaliou-se a efici?ncia de remo??o do teor de ?leos e graxas da ?gua produzida atrav?s da t?cnica combinada flocula??o/flota??o por ar dissolvido utilizando a mistura de floculantes natural de Moringa ole?fera e dois floculantes comerciais ?C? e ?D? (j? utilizados na ind?stria), objetivando deixar a ?gua produzida nas condi??es de descarte. Os ensaios foram realizados segundo planejamento experimental para avalia??o estat?stica da influ?ncia da concentra??o total de floculante, tempo de mistura lenta e tempo de flota??o na efici?ncia de remo??o do teor de ?leos e graxas. Al?m disso, para cada mistura e suas respectivas propor??es estudadas, obtiveram-se modelos matem?ticos. O tratamento do efluente utilizando a mistura do floculante Moringa ole?fera e floculante comercial ?D?, com propor??o de mistura em base volum?trica 50:50%, atendeu os requisitos ambientais em todas as condi??es avaliadas; enquanto, nas mesmas condi??es, n?o foi poss?vel utilizando a mistura do floculante Moringa ole?fera e floculante comercial ?C?. Tamb?m verificou-se a efici?ncia de remo??o de ?leos e graxas com mistura do floculante Moringa ole?fera e floculante comercial ?D? com propor??o de mistura em base volum?trica 70:30% (respectivamente) sendo esta condi??o de interesse ambiental, uma vez que foi poss?vel atender os requisitos ambientais para descarte da ?gua produzida. Todas as misturas do floculante de Moringa ole?fera e floculantes comerciais ?C? e ?D? estudadas mostraram-se eficazes na adequa??o da ?gua produzida para descarte. Finalmente, avaliou-se o efeito potencializador da Moringa ole?fera sobre o floculante comercial ?D? na remo??o do teor de ?leos e graxas da ?gua produzida. / The Oil Industry is one of the sectors with greatest potential for environmental degradation and the produced water is the largest waste stream generated in this industry. The complex chemical composition and the high volume generated of this effluent hold a strict control and management. In accordance with current environmental legislation the water should be treated before final disposal, reuse or recycle including underground injected vapor to increase oil production. In view of the treatment of produced water for oil and grease content removal, the combined technique flocculation/dissolved air flotation has been extensively studied. In the flocculation step has been used high cost flocculants of chemical industry which are non-biodegradable. In this context it was evaluated the removal efficiency of oil and grease content from produced water by the combined technique flocculation/dissolved air flotation using Moringa Ole?iferaM.O) a natural flocculant blended with two commercial flocculants ?C? and ?D? (currently used in the oil industry), aiming to let the water produced in the disposal conditions. The experiments were conducted by means of statistical experimental design evaluating the influence of the total concentration of flocculants, slow mixing time and flotation time over the efficiency of oil and grease content removal. Moreover, for each mixture and their respective ratios studied, were obtained mathematical models. The effluent treatment using the mixture of Moringa ole?fera and commercial ?D? flocculants with mixing ratio of 50:50 (%, volume basis) achieved the environmental requirements in all conditions evaluated, while, under the same conditions it wasn?t possible using the mixture of Moringa Ole?fera and commercial ?C? flocculant. The oil and grease removal content efficiency using a mixing ratio of 70:30 (%, volume basis of M. O and commercial flocculant, respectively) showed to be an interesting condition to reach the environmental requirements for produced water disposal once all mixtures of Moringa Ole?fera and commercial flocculants ?C? and ?D? achieved satisfactory experimental results for produced water disposal. Finally, we evaluated the effect of improvement of Moringa ole?fera into commercial flocculant ?D? on oil and grease removal content efficiency.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/21876 |
| Date | 29 July 2016 |
| Creators | Freitas, J?ssica Isabelle de Souza |
| Contributors | 16838572400, Oliveira, Ana Karla Costa de, 02293566480, Nascimento, Andr? Ezequiel Gomes do, 01018188401, Sousa, Magna Angelica dos Santos Bezerra, 02014315485, Melo, Marcel Vasconcelos, 05257308770, Paulo, Jo?o Bosco de Ara?jo |
| Publisher | PROGRAMA DE P?S-GRADUA??O EM ENGENHARIA QU?MICA, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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