The objectives of this work are to investigate the effect of
solid media, kaolin, bentonite and activated carbon on a monoazo
dye (Acid Orange 7) biodegradation by three different
bacteria under aerobic conditions and to study the kinetics
and mechanism of the decolorization process. Bacteria will
be inoculated on the solid surface and dye concentration will
be followed in the course of time. Special attention will be
paid to the properties of the solids used for fixation of bacteria.
The azo dye selected for the study was Acid Orange 7 (CI
15510), widely used in textile factories and degraded by these
microorganisms in previous experiments.