Typical process conditions for bleaching softwood KP chemical Naoh CIO laOh CiO2 Water Water Steam Water Steam Steam Unbleached pulp D Eo D LBI leached pulp Effluent to Acidic Alkaline effluent recovery effluent South China University of TechnologySouth China University of Technology Unbleached pulp Effluent to recovery NaOH O2 Water & Steam Acidic effluent ClO2 Water NaOH O2 Water & Steam Alkaline effluent Water & Steam O2 ClO2 Bleached pulp O D Eo D Typical process conditions for bleaching softwood KP chemical