Management of nonprocess elements in low-effluent bleached kraft pulp mills
- Institute of Paper Science and Technology, Atlanta, GA (United States)
Increasing environmental regulation for the discharge of chlorinated organics in bleach plant effluents has required most manufacturers in the pulp and paper industry to reduce the charge of elemental chlorine in the bleaching of kraft pulp. The best long term solution for reducing effluent pollutants from bleached kraft pulp mills is to move towards low-effluent (closed-cycle) bleaching. Closure of operating bleach plants would dramatically reduce both the volume and the pollutant concentration of pulp mill effluents. However, closing the mill creates many operational problems including a concentration build-up of nonprocess elements (NPE`s) in process streams. NPE`s usually enter the pulp process as trace constituents of wood. Recent studies have lead to a fundamental understanding of how NPE`s partition between the solid cellulose phase and the liquid aqueous phase in pulp mill process streams. This knowledge will help in the design, operation and optimization of future low-effluent bleach plants.
- OSTI ID:
- 214631
- Report Number(s):
- CONF-950801-; TRN: 96:000922-0100
- Resource Relation:
- Conference: 210. national meeting of the American Chemical Society (ACS), Chicago, IL (United States), 20-25 Aug 1995; Other Information: PBD: 1995; Related Information: Is Part Of 210th ACS national meeting. Part 1 and 2; PB: 1866 p.
- Country of Publication:
- United States
- Language:
- English
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