Combined system of activated sludge and ozonation for the treatment of kraft E1 effluent.
The treatment of paper mill effluent for COD, TOC, total phenols and color removal was investigated using combined activated sludge-ozonation processes and single processes. The combined activated sludge-O3/pH 10 treatment was able to remove around 80% of COD, TOC and color from Kraft E(1) effluent. For the total phenols, the efficiency removal was around 70%. The ozonation post treatment carried out at pH 8.3 also showed better results than the single process. The COD, TOC, color and total phenols removal efficiency obtained were 75.5, 59.1, 77 and 52.3%, respectively. The difference in the concentrations of free radical produced by activated sludge-O3/pH 10 and activated sludge-O3/pH 8.3 affected mainly the TOC and total phenol removal values.
Laboratório de Química Biológica, Instituto de Química, Universidade Estadual de Campinas CP 6154, CEP 13084-971, Campinas, SP, Brazil. massalin@cnpma.embrapa.br
Marcia Regina
MR
Assalin
Edna
E
Dos Santos Almeida
Nelson
N
Durán
D019149:Bioreactors; D003116:Color; D007220:Industrial Waste / Q000032:analysis*; D010100:Oxygen / Q000737:chemistry; D010126:Ozone / Q000737:chemistry*; D010209:Paper; D010636:Phenols / Q000032:analysis; D012722:Sewage; D014865:Waste Disposal, Fluid / Q000379:methods*
D007220:Industrial Waste; D010636:Phenols; D012722:Sewage; D010126:Ozone; D010100:Oxygen