Advanced treatment technologies for the removal of color and phenol from the effluent of paper industry wastewater

摘要

This paper analyzes the removal of colour and phenol found in pulp and paper industry wastewater using advanced technologies: (i) coagulation-flocculation-sedimentation, (ii) granular activated carbon filtration, (iii) combination of coagulation-flocculation-sedimentation and granular activated carbon filtration. Jar tests and bench-scale column tests were performed. The main results obtained were: removals of 89% and 60% for colour and phenol, respectively, using coagulation-flocculation-sedimentation; for activated carbon filtration, overall colour and phenol removal of 45% and 47%, respectively; and maximum removals obtained were 99% for colour and above 93% for phenol, when the complete cycle (coagulation-flocculation-sedimentation combined with filtration) was tested. Along with this last treatment, it was possible to obtain a high-quality final effluent and to comply with the environmental regulations in several aspects.