Advanced oxidation of a pulp mill bleaching wastewater.
The degradation, by several advanced oxidation reactions, of a pulp mill ECF bleaching effluent, was studied. The initial biodegradability of the organic matter present in the effluent, estimated as the BOD5/COD, was low (0.3). When the effluent was submitted to ozonation and to five different advanced oxidation systems (O3/UV, O3/UV/ZnO, O3/UV/TiO2, O2/UV/ZnO, O2/UV/TiO2), the biodegradability increase significantly. After five minutes of reaction, the O3/UV system appears as the most efficient in to transform the organic matter to more biodegradable forms. A similar effect was observed when the effluent was submitted to an activated sludge treatment. The COD, TOC and toxicity reduction correlated well with the biodegradability enhancement after AOPs treatments.
Yeber
M C
MC
Laboratory of Renewable Resources, Faculty of Chemical Sciences, Universidad de Concepción, Chile.
Rodríguez
J
J
Freer
J
J
Baeza
J
J
Durán
N
N
Mansilla
H D
HD
D001673:Biodegradation, Environmental; D018533:Biomass; D002482:Cellulose; D017606:Chlorine Compounds; D007220:Industrial Waste / Q000009:adverse effects* / Q000032:analysis*; D010084:Oxidation-Reduction; D010087:Oxides; D010209:Paper; D010776:Photobacterium / Q000378:metabolism; D014865:Waste Disposal, Fluid
D017606:Chlorine Compounds; D007220:Industrial Waste; D010087:Oxides; C025109:chlorine dioxide; D002482:Cellulose