Filtration method for metal working waste water

Details Filtration method for metal working waste water Filtration method for metal working waste water

1996-05-07

1998-12-29

Fortuna, Ana

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210651, 210641, 210701, 210774, B01D 6100

Patent

active

058535934

ABSTRACT:
A method is provided for filtering waste water containing metallic cations having valences in whole integers of at least two in concentrations greater than about one part to about one million parts of the metalworking waste water. The method utilizes an ultrafilter (6) in series with a nanofilter (14) and the addition of a chemical dispersant effective to render the nanofilter permeate suitable to meet applicable environmental standards for discard into streams, lakes and sanitary sewers.

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