ABSTRACT
Procedures based on the surplus of chemicals for the tertiary treatment process of the Riocell S.A. (Guaíba, RS state - Brazil), are described. The effluent samples were characterized in relation to their colors and contents of organ-halogenated compounds and then submitted to a conditioning step with application of two different flocculants using solid residues of process (“dreg”, “grit”, ashes) and active carbon as adjuncts. An appreciable reduction of the color and content in organ-halogenated compounds was observed, as well as an economy on costs with flocculants.
Key words:
chemicals process; effluent; cellulose