Abstract
Model dye wastewater prepared by adding Bordeaux S (BS) dye was treated by a fixed bed of biological activated carbon (BAC) in comparison to granular activated carbon (GAG) treatment of the wastewater. The total removal efficiency of color and COD in the BAC and GAC column, respectively, was studied. It became clear that the biodegradation rate of BS dye was low because of the low growth rate of Y-1 culture, which was isolated from surface of BAG particles. From the study of BS dye adsorption on Y-1 culture, it was found that the adsorption rate was very high, and adsorption capacity increased greatly when the equilibrium concentration became higher. The adsorption capacity of Y-1 culture which exists on SAC surface can be increased greatly, because the concentration of BS dye on the surface of carbon particles becomes higher due to adsorption. It can be considered therefore, that the adsorption of BS dye on Y-1 culture plays an important roles for removal of BS dye by BAC treatment.
