Abstract
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.
Keywords:
Industrial effluents; Tertiary treatment; Activated carbon