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Previous issue date: 2014-07-30 / O principal efluente presente na ind?stria do petr?leo ? a ?gua produzida, que normalmente est? associada ao ?leo produzido, apresentando um consider?vel volume de produ??o e podendo refletir em efeitos nocivos ao meio ambiente e ? sociedade caso seu descarte seja inadequado, sendo imprescind?vel, portanto, um valoroso cuidado para estabelecer e manter a sua gest?o. O tratamento convencional para este efluente associa as t?cnicas de flocula??o e flota??o. Na flocula??o s?o utilizados floculantes convencionais que, al?m do alto custo, s?o fornecidos com pouca informa??o t?cnica. A flota??o ? a etapa na qual ? poss?vel obter a separa??o das part?culas coloidais presentes no efluente, sendo a flota??o por ar dissolvido (FAD) uma t?cnica que vem se consolidando economicamente e apresentantdo grande confiabilidade ambiental ao se comparar com outros processos. A FAD se apresenta como um processo largamente empregado em v?rios campos de tratamento de ?guas de abastecimento e de efluentes industriais em todo o planeta. Neste sentido, esse trabalho objetivou avaliar o potencial de um floculante alternativo natural ? base de Moringa oleifera na redu??o do teor de ?leos e graxas (TOG) da ?gua produzida na ind?stria do petr?leo atrav?s do m?todo de flocula??o/FAD. Avaliou-se a efici?ncia do floculante natural e se comparou sua efici?ncia com dois floculantes comerciais normalmente utilizados pela ind?stria do petr?leo (A e B). Os resultados de efici?ncias globais para todos os floculantes foram tratados atrav?s de planejamentos estat?sticos experimentais com base na utiliza??o do software STATISTICA vers?o 10.0. Obteve-se no planejamento experimental superf?cies de contorno e de resposta que foram interpretadas em termos da vari?vel resposta efici?ncia de remo??o de TOG (Teor de ?leos e/ou Graxas). O planejamento permitiu ainda a obten??o de modelos matem?ticos para c?lculo da vari?vel resposta nas condi??es estudadas. Os floculantes comerciais A e B apresentaram comportamentos similares, com efici?ncia global m?dia de 90% na efici?ncia de remo??o do ?leo, sendo a an?lise econ?mica o fator decisivo para a escolha de utiliza??o desses floculantes no processo. O floculante alternativo natural, ? base de Moringa oleifera, apresentou menor efici?ncia de separa??o que ?quelas de A e B (em m?dia 70%), por outro lado este floculante se apresenta ambientalmente correto e de menor custo. / The principal effluent in the oil industry is the produced water, which is commonly
associated to the produced oil. It presents a pronounced volume of production and it can be
reflected on the environment and society, if its discharge is unappropriated. Therefore, it is
indispensable a valuable careful to establish and maintain its management. The traditional
treatment of produced water, usualy includes both tecniques, flocculation and flotation. At
flocculation processes, there are traditional floculant agents that aren?t well specified by
tecnichal information tables and still expensive. As for the flotation process, it?s the step in
which is possible to separate the suspended particles in the effluent. The dissolved air
flotation (DAF) is a technique that has been consolidating economically and environmentally,
presenting great reliability when compared with other processes. The DAF is presented as a
process widely used in various fields of water and wastewater treatment around the globe. In
this regard, this study was aimed to evaluate the potential of an alternative natural flocculant
agent based on Moringa oleifera to reduce the amount of oil and grease (TOG) in produced
water from the oil industry by the method of flocculation/DAF. the natural flocculant agent
was evaluated by its efficacy, as well as its efficiency when compared with two commercial
flocculant agents normally used by the petroleum industry. The experiments were conducted
following an experimental design and the overall efficiencies for all flocculants were treated
through statistical calculation based on the use of STATISTICA software version 10.0.
Therefore, contour surfaces were obtained from the experimental design and were interpreted
in terms of the response variable removal efficiency TOG (total oil and greases). The plan still
allowed to obtain mathematical models for calculating the response variable in the studied
conditions. Commercial flocculants showed similar behavior, with an average overall
efficiency of 90% for oil removal, however it is the economical analysis the decisive factor to
choose one of these flocculant agents to the process. The natural alternative flocculant agent
based on Moringa oleifera showed lower separation efficiency than those of commercials one
(average 70%), on the other hand this flocculant causes less environmental impacts and it?s
less expensive
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/19428 |
| Date | 30 July 2014 |
| Creators | Magalh?es, Emilianny Rafaely Batista |
| Contributors | 16838572400, http://lattes.cnpq.br/4322467752580322, Barros Neto, Eduardo Lins de, 59545844434, http://lattes.cnpq.br/2811639726261017, Melo, Marcel Vasconcelos, 05257308770, http://lattes.cnpq.br/4059115905202818, Paulo, Jo?o Bosco de Ara?jo |
| Publisher | Universidade Federal do Rio Grande do Norte, 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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