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.
Use of electrochemical oxidation process as post-treatment for the effluents of a UASB reactor treating cellulose pulp mill wastewater
A.P. Buzzini, D.W. Miwa, A.J. Motheo, E.C. Pires; Use of electrochemical oxidation process as post-treatment for the effluents of a UASB reactor treating cellulose pulp mill wastewater. Water Sci Technol 1 July 2006; 54 (2): 207–213. doi: https://doi.org/10.2166/wst.2006.507
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