Two Methods of Reducing Organics Carryover: Last Stage Washing Optimization and Leaching, 1994 Environmental Conference Proceedings

William Josephson, Harry T. Cullinan, Gopal A. Krishnagopalan

In a staged, counter-current brownstock washing scheme the conditions present on the last stage are of critical importance in determining the amount of organic and inorganic materials that leave the system with the washed pulp. The pH of the last stage’s shower liquor has been found to be the main factor controlling the amount of attached material leaving with the washed pulp. Two methods of reducing organics carryover have been investigated. Both last stage, split addition of pH controlled shower liquors and short term, pH controlled leaching of washed pulp have been found to reduce organics carryover. The appropriate application of these methods will lessen effluent treatment costs and, in the case of bleachable pulp, bleach demand.

Author: Josephson, W., Krishnagopalan, G.A., Cullinan, H.T.
Two Methods of Reducing Organics Carryover: Last Stage Washi
Two Methods of Reducing Organics Carryover: Last Stage Washing Optimization and Leaching, 1994 Environmental Conference Proceedings
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