The production of nitrocellulose (NC) creates large quantities of waste NC fines in wash water streams. Current processing techiques attempt to remove these fines by cross-flow microfiltration, pressure flotation, settling, centrifugation, and lime precipitation. Pressure flotation, of dissolved air flotation (DAF), is a solid/liquid separation process first developed in the ore processing industry. DAF has since found many applications in the environmental engineering field including: drinking water clarification, sluge thickening, and the clarification of wastewater from a variety of industrial and municipal processes.
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