Method and apparatus for recovering wash water from pulp and paper mill effluent

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United States of America Patent

PATENT NO 5470481
SERIAL NO

08135913

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Abstract

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A method and apparatus for recovering wash water from effluent generated by a pulp and paper mill. The method includes filtering at least a portion of the effluent to form a filtrate stream and an organic solids feed stream. The organic solids feed stream is exposed to a temperature and a pressure which are supercritical for water to cause a substantial portion of the organic component to oxidize and form a product stream that, when cooled, includes a gaseous component, an inorganic solids component, and a liquid wash water component. The wash water component is separated from the gaseous and inorganic solids components, thereby recovering wash water.

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Patent Owner(s)

Patent OwnerAddress
NORAM ENGINEERING AND CONSTRUCTORS LTDGRANVILLE SQUARE SUITE 1800 200 GRANVILLE STREET VANCOUVER BRITISH COLUMBIA V6C 1S4

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Gairns, Stuart A Burnaby, CA 2 30
Hauptmann, Edward G West Vancouver, CA 10 183
Modell, Michael Cambridge, MA 5 370

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