Efectividad de la formación de biofilms por cepas de pseudomona y su capacidad de disminución de cloro y antagónica de bacterias coliformes

The effectiveness of formation of biofilms or "biofilm" by strains of Pseudomonas and their capacity to reduce chlorine and antagonistic to coliform bacteria, allows to a large extent, study the ability of P. aeruginosa and P. fluorencens to form biofilm. For the experimental design four tanks with drinking water were used, to which sodium thiosulfate was added to eliminate chlorine concentrations. To make the formation of Biofilms, four PVC "T" structures were placed, supported with sweet wire. Three treatments were used, one with P. aeruginosa, another with P. fluorencens and the mixture (combination of both strains). Counting, characterization and quantification of bacterial colonies were carried out for each treatment. In order to determine the effectiveness of biofilm formation by strains of P. aeruginosa and P. fluorescens, as well as their capacity to reduce chlorine and antagonistic tocoliform bacteria. Our results indicate that P. aeruginosa showed a greater capacity to form biofilms, in comparison with the other treatments. The strains showed effectiveness in decreasing the concentrations of chlorine used, as well as, great power of antagonism against Escherichia coli. P. aeruginosa showed greater antagonism capacity with a 1mm diameter halo. We have found that the strains of Pseudomonas used produce biofilms efficiently, which reduces chlorine.