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Dissolved Air Floatation (DAF) - SAWater

Dissolved Air Flotation (DAF). Trade waste Guideline Reviewed 1/03/2013. INTRODUCTION. Grease arrestors are the simplest devices for the removal of grease and oil (G&O), and fine suspended solids (SS) from trade wastewater. Their simple operating principle using adequate retention time and differences in specific gravity to separate and retain contaminants, produces wastewater quality under ideal conditions that is acceptable for small trade waste discharges. However, their effectiveness drops greatly in many everyday circumstances despite regular maintenance pump-outs. For example;. Sustained periods of high inflow rate reduce the retention time and the arrestor's ability to separate contaminants or reduce temperature.

biological breakdown of material in the DAF unit. Temperature in the DAF vessel should be maintained below 40 degrees C. pH pH inconsistencies can result in potential damage to treatment equipment, odours and non-compliance with the trade waste discharge limit of pH 6-10 at all times. Buffering of pH by mixing

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