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Plaster process waste

Dear P2 Specialists:

I am sure some of you have worked with companies that make plaster molds as
part of a manufacturing process.  I am looking for a suggestion on how best
prevent or deal with the excessive waste water and plaster that results from
the process.

The company I am working with makes plaster molds as part of a temporary
tooling process.  The waste generated results in about (6) 55 gallon drums
each day and is 30-40% plaster and 60-70% water.  Short of pressing or
draining the water off to the POTW and then letting plaster dry for solid
waste disposal, does anyone have any suggestions.

Thank you in advance for your assistance!

Nancy J. Larson
Industrial Pollution Prevention Specialist
KSU Pollution Prevention Institute
316/722-7721 ext.254