Study on Characteristics and Bio-treatment of Effluent from Eucalyptus P-RC APMP Process

Characteristics of effluent from eucalyptus P-RC APMP process were analyzed comprehensively for the first time. The results indicate that when producing 1 t of eucalyptus P-RC APMP, 26.7 -m3 water was consumed, and in the effluent discharqed COD of 114.8 kg, BOD of 35.7 kg, SS of 42.1 kg were determined. When anaerobic treatment in the charge of 5 g COD/(L·d), COD in the effluent removed was 61.3%, meanwhile, 73.7% of COD was removed after further aerobic treatment at the level of HRT 24 h. The bio-treated effluent, after primary coagulation treatment, could easily come up to the state standard of effluent discharge GB 3544-2001. By advanced coagulation treatment, COD and SS in the bio-treated effluent were less than the level of 200 mg/L and 60 mg/L, respectively, meeting the environmental protection requirement.