Sealed PVA package with activated carbon and its use in waste water treatment.

摘要

A process for addition of powdered substances, such as powdered carbon, to waste water comprising packaging the powdered substance in a water-soluble container (16 or 28). The entire package is introduced to the liquid medium where it floats on the surface (18). The underside contacting the liquid dissolves first and the powdered carbon is progressively dispersed into the liquid while the upper surface of the package prevents release of the powdered substance to the surrounding environment. The water soluble package is preferablfy made of polyvinyl alcohol and is provided initially with a water resistant outer package for storage and transport.