Technical Bulletin No. 0181: Decolorization of Pulp Mill Bleaching Effluents Using Activated Carbon

  This Technical Bulletin was first distributed by the National Council in May 1965. Preliminary studies conducted earlier by the National Council at Purdue University had indicated that effluent from bleached semi-chemical pulps could be decolorized with activated carbons. The quantity of carbon required per unit volume of effluent was very high, but tests indicated that recovery, reactivation and reuse of the carbon might be feasible.  These investigations covered the effect of temperature and pH value on the ability of various activated carbons to adsorb the color bodies present in kraft pulp bleachery effluents.