Experimental Investigation of Chemical Oxygen Demand, Lignin and Phenol Removal from Paper Mill Effluents Using Three-Phase Three-Dimensional Electrode Reactor

Abstract

the removal of chemical oxygen demand (coD), lignin and phenol from paper mill effluents was experimentallyinvestigatedusinganelectrodecellconsistingofgraphiteelectrodeandpowder-activated� carbon (as working electrode). the effects of electrolyses time, voltage, initial ph, activated carbon (ac), NaClamountandairflowwereselectedasparameters.�Theexperimentalresultsshowthatremovaleffi- ciency significantly depends on the applied cell voltage, airflow, time, salt amount and ph. For electrolyses under the conditions of 25.0v cell voltage, 5.0 min, in presence of air 2.0 minl -1 , nacl 5.0gl -1 �atlowpH� andAC�20gl -1 , it can be said that the removal of coD, lignin and phenol from the paper mill effluent were almost higher than 90%. the present study proves the effectiveness of electrochemical treatment for the highlyconcentratedorganicpollutantspresentinpapermilleffluents.