title: Use of electrochemical oxidation process as post-treatment for the effluents of a UASB reactor treating cellulose pulp mill wastewater.
abstract: The main purpose of this study was to evaluate the performance of the electrochemical oxidation process as a post-treatment for the effluents of a bench-scale UASB reactor treating simulated wastewater from an unbleached pulp plant. The oxidation process was performed using a single compartment cell with two plates as electrodes. The anode was made of Ti/Ru0.3Ti0.7O2 and the cathode of stainless steel. The following variables were evaluated: current density (75, 150 and 225 mA cm(-2)) and recirculation flow rate in the electrochemical cell (0.22, 0.45 and 0.90 L h(-1)). The increase in current density from 75 to 225 mA cm(-2) did not increased the color removal efficiency for the tested flow rates, 0.22, 0.45 and 0.90 L h(-1), however the energy consumption increased significantly. The results indicated the technical feasibility of the electrochemical treatment as post-treatment for UASB reactors treating wastewaters from pulp and paper plants.
authors.affiliation: Department of Hydraulics and Sanitation, School of Engineering of São Carlos, University of São Paulo, Brazil.
authors.forename: A P
authors.initials: AP
authors.lastname: Buzzini
authors.forename: D W
authors.initials: DW
authors.lastname: Miwa
authors.forename: A J
authors.initials: AJ
authors.lastname: Motheo
authors.forename: E C
authors.initials: EC
authors.lastname: Pires
mesh_terms: D002482:Cellulose / Q000737:chemistry*; D004563:Electrochemistry / Q000379:methods*; D007220:Industrial Waste; D010084:Oxidation-Reduction; D010209:Paper; D014874:Water Pollutants, Chemical
chemical_list: D007220:Industrial Waste; D014874:Water Pollutants, Chemical; D002482:Cellulose