Technical Bulletin No. 0630: Effects of Chlorine Dioxide Substitution on Bleach Plant Effluent BOD and Color

Data published in the literature on BOD and color discharges from bleaching sequences using high chlorine dioxide substitution have been reviewed, and results of mill trials and NCASI studies have been presented. These studies show that increasing levels of chlorine dioxide substitution reduced bleach plant effluent BOD and color. However, the decrease in effluent BOD was not significant until chlorine dioxide substitution levels higher than 70 percent were achieved.