Process for removal of dyes in aqueous solutions by adsorption to dreche brewery and their use in the treatment of aqueous effluents of industrial dyes

摘要

The present invention relates to a process for the removal of dyes in aqueous solution by adsorption to dreche brewery and their use in the treatment of aqueous effluents of industrial dyes. The reaction of adsorption takes place in descontinuos reactors with balance.The reaction medium is constituu00cddo by aqueous solutions of an acid dye (Acid Orange 7 monoazo AO7) widely used in the textile, which adds the dreche brewery obtained after the operation of mash, the production of beer.The conditions of adsorption (prior treatment of dreche: drying or acid hydrolysis followed by drying; time of acid hydrolysis of the dreche; amount of dreche used; time of adsorption; the pH of the aqueous solution of the dye; the concentration of dye) were optimized according to the metodolo GIA of areas of response.Finally, the results obtained were used in the implementation of the process in the reactor descontu00cdnuo with successive reuse of dreche.