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DAF Wastewater Treatment System. Dissolved air flotation [DAF] is a treatment process which removes suspended solids, oil and grease from wastewater. Many applications use the DAF process but it is particularly useful for industrial wastewater treatment as it can reduce COD by up to 90%. Dissolved air flotation involves the creation of tiny air bubbles that collect waste particles as they float to the surface.
Thus, MMPs usually pay fines to dispose of their wastewater at municipal wastewater treatment plants (Massé and Masse, 2000). According to Wu and Mittal (2011), there are approximately 142 MPPs in Ontario that can process 100–200 animals per month. 53% of Ontario's slaughterhouses do not treat their wastewater prior to disposal. Only 16% of Ontario's slaughterhouses use dissolved air flotation (DAF) or aeration.
