%0 Journal Article
%T Disminuci車n de la DQO en aguas de formaci車n utilizando cepas bacterianas Diminution of the COD in formation waters using bacterial stocks
%A Fernando Luis Castro Echavez
%A Nola Mar赤a Fern芍ndez Acosta
%A Magaly Jackelin Ch芍vez Delgado
%J Revista T谷cnica de la Facultad de Ingenier赤a Universidad del Zulia
%D 2008
%I Scientific Electronic Library Online
%X En la presente investigaci車n se aislaron e identificaron 5 grupos bacterianos de 3 muestras liofilizadas de suelos contaminados. La identificaci車n de las bacterias incluy車 la tinci車n de Gram, tensi車n de ox赤geno y pruebas bioqu赤micas. Los microorganismos, individuales y en consorcio, fueron utilizados para realizar pruebas de tratabilidad a escala de laboratorio en reactores aerobios mesof赤licos por carga de 3 L, con un volumen 迆til de 1 L, conteniendo 0.3 L de suspensi車n bacteriana y 0.7 L de agua de formaci車n de petr車leo mediano. Antes y durante los 6 d赤as de experimentaci車n se realizaron mediciones de pH, DQO, alcalinidad total, SSV y SST del agua de formaci車n. Los resultados considerados a partir del segundo d赤a de tratamiento, cuando las condiciones en los reactores son m芍s estables y los microorganismos est芍n m芍s adaptados al medio proporcionado, indican una eficiente disminuci車n de la DQO, entre 62.4 y 89.8%, utilizando las diferentes cepas bacterianas, debidamente caracterizadas, y el consorcio, demostrando la eficiencia de los microorganismos, individuales y en conjunto, de biodegradar la materia org芍nica compleja presente en el agua de formaci車n utilizada, correspondiendo las mayores eficiencias en la disminuci車n de la DQO al consorcio bacteriano (89,8%) seguido por los g谷neros Xanthomonas (84%) y Aeromonas (80,6%). Five groups bacteria were isolated and identified from liofilizated samples of contaminated soil. The identification of these bacteria included: Gram stain, oxygen tension and, biochemical tests. Individually and in consortium, the microorganisms isolated were used to conduct a treatability study on a laboratory scale as well as in a mesof赤lics aerobic reactors with load of 3 L, that have a useful volume of 1 L. The reactor cointaned 0,3 L of bacterial suspension and 0,7 L of water supplemented with a formation of mediated petroleum. Before and during the 6 days of experimentation were measured the pH, COD, total alkalinity, VSS and TSS of formation water were. The results considered were those collected from the second day of treatment, since it is then when the conditions in the reactors are more stable and the microorganisms are more adapted to medium provided. Those results indicated an efficient reduction of the COD, (between 62,4 and 89,8%), while using the different bacterial stocks properly characterized and the consortium., this finding showed the efficiency of the individual microorganisms and in groups to biodegrade complex organic matter present in the water formation used. We found that the bacterial consortium was more
%K Consorcio de bacterias
%K biodegradabilidad
%K aguas de formaci車n de petr車leo mediano
%K tratamiento aerobio
%K Consortium of bacteria
%K biodegradability
%K water from medium petroleum formation
%K aerobic treatment
%U http://wwww.scielo.org.ve/scielo.php?script=sci_arttext&pid=S0254-07702008000300006