| 摘要 |
23 METHODS FOR REMOVING SOLIDS FROM WATER-BASED PAINT SYSTEMS Methods of treating circulating water containing over-sprayed, water-borne paint, such as in a paint spray booth operation, comprise adjusting the alkalinity of the paint spray booth water to between about 20 and 600 ppm, on a calcium carbonate basis, by adding an alkalinity source thereto, adding a melamine polymer to the water, contacting the over-sprayed, water-borne paint with the alkalinity-adjusted paint spray booth water before or after addition of the melamine polymer, adding an effective amount of a flocculant to the paint spray booth water, and removing resulting sludge from the paint spray booth water.
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