Technical Bulletin No. 0919: Review of Color Control Technologies and Their Applicability to Modern Kraft Pulp Mill Wastewater
The color of treated effluents from kraft pulp mills has decreased considerably in recent years owing to increased efforts to reduce losses of pulping liquors and the replacement of chlorine bleaching with chlorine dioxide. For a few mills, however, the unique characteristics of receiving waters have prompted ongoing efforts to investigate techniques for achieving additional reductions in effluent color. This report provides a review of recently investigated and currently employed color reduction techniques, focusing primarily on information made available since 1995, when a similar review was last prepared.