PAC COAGULANTS IN PULP AND PAPER WASTEWATER TREATMENT

摘要

The coagulation/flocculation is a major process in the wastewater treatment. A study was conducted to compare the efficiency of two polymeric PAC coagulants (PAC, PAX 61) and two monomelic coagulants, A12(S04)3 and A1C13, in pulp and paper wastewatertreatment. PAC and PAX 61 showed the advantage over the traditionally used A12(S04)3 and A1C13 in the removal of basic wastewater pollutants. The use of the optimum dose of 10.3 mg Al/dm3 with PAC ensured over 90% removal of turbidity, color and around 50% COD reduction. A similar effect was obtained after the use of an around 50% higher PAX 61 dose.