SAF™ Systems

Vegetable processing solids on Model DWC Dewatering Conveyor

MODEL SAF 250 Treating food processing wastewater

TYPICAL APPLICATIONS (partial list)
Food, Dairy, and Animal Products Processing: Removal of suspended solids from screened raw wastewaters, with thickening of recovered solids.
Municipal Wastewater: Waste activated sludge thickening, primary clarification with grit removal, secondary clarification with solids thickening.
Wastewater Effluent Ponds: Removal of algae and other suspended solids for direct discharge or as a polishing step prior to tertiary filtration.
Water Treatment: Removal of suspended solids as a polishing step prior to filtration. Increases filter run time between backwashes, and recovery of backwash water.  NSF 60 listed frothing agent for potable water applications.
Oily Wastes: Removal of emulsified oil from water (air compressor condensate, vehicle wash water, oilfield produced water, etc.).

OPERATIONAL ADVANTAGES
SAF™ is re-writing the book on flotation technology, replacing DAF as the method of choice for removal of suspended solids from wastewater. 
SAF™ flotation tanks are less than 20% as large as DAF tanks for the same treatment rate. Because of the high air content of Suspended Air^® Emulsion, a SAF™ system can be just as effective as a DAF using only 2% of the power for air generation.  Floated solids are gelatinous and can be dewatered by simple gravity drainage. 
The SAF™ System can successfully treat wastewaters containing  as much as 15,000 mg/L of suspended solids with removal rates greater than 90%. In many cases effluent suspended solids are less than 5 mg/L.

SYSTEM FEATURES AND OPTIONS
Standard Features: Systems are supplied complete, pre-engineered and ready for on-site assembly, including a dual compartment conditioning tank, coagulant metering pump, polymer activation system, Series F Suspended Air^® Emulsion Generator, Series CF ClearFloater™ Flotation Separator, Series DWC Dewatering Conveyor, and NEMA 4X electrical control panel containing all controls, displays, and motor drives.
Series DWC Dewatering Conveyor: Conveyor belt is a polypropylene chain belt with wedge cross section openings approximately 0.038” x 0.25”, driven at approximately 5 feet per minute by a variable speed gearmotor.
Optional Solids Pump: Peristaltic hose pump for conveyance of dewatered solids to disposal or further processing.