Barros Neto, Eduardo Lins deHenrique, João Miller de Melo2017-08-032017-08-032017-04-07HENRIQUE, João Miller de Melo. Composição e tratamento da água produzida de petróleo no desempenho de sementes de alface e gergelim. 2017. 99f. Dissertação (Mestrado em Engenharia Química) - Centro de Tecnologia, Universidade Federal do Rio Grande do Norte, Natal, 2017.https://repositorio.ufrn.br/jspui/handle/123456789/23697For the petroleum industry, several countries that have activities related to exploration and production search alternatives for the discard of the produced water (PW) generated. On the other hand, agricultural irrigation is the main activity consuming water resources. In search of a solution, the use of waste water in this activity has a potential application. In this context, the objective of this research was to study the composition and treatment of water produced from petroleum in the performance of lettuce and sesame seeds. The effluent was treated with ionic flocculation using 5 concentrations of surfactant: 300, 350, 400, 450 and 500 ppm. After stabilization of the flakes, the solution was subjected to a filtration process. Regarding the treatment, the removal of metals and oil were measured. At the same time, germination and vigor tests were analyzed: germination, first germination test, germination velocity index, length of upper part, radicle length, length of the seedling and dry mass. Finally, inhibition curves for the constituents of PW and for the surfactant were plotted, in order to verify the inhibitory concentrations of these components. After treatment of the PW with flocculation and filtration, up to 40% of calcium and 99% of the oil were removed. Without filtration, only the concentration of 300 ppm of surfactant did not comply with the legislation (OGC = 20 ppm). For low concentrations of organic, metals and salinity in the water produced, the process was efficient in the treatment of the effluent. For the germination, there was no difference in the most of the cases tested. However for the vigor there was difference, being negatively affected with the use of the produced water. The treated effluents presented performance close to that of the distilled water. The inhibition curves formulated for the constituents of the produced water showed a decrease in the variables as the concentrations increased. Regarding oil, there was no difference in germination, only in vigor. For the surfactant, it was verified that the concentrations studied showed no toxic or inhibitory effect for the cultures.Acesso AbertoÁgua produzidaTensoativoGerminaçãoAlfaceGergelimmasterThesisCNPQ::ENGENHARIAS::ENGENHARIA QUIMICA