Pilot Testing Capabilities

SAF® System Pilot Testing For Wastewater Applications

  • 250 gpm self-priming Feed Pump with a VFD controller
  • 4-inch magnetic Flow Meter
  • pH control system with PID loops for acid and caustic feed
  • Flow controlled outlets for coagulant feed and coagulation
  • Conditioning Tank fabricated partitioned into two units with mixers and an overflow weir
  • Polymer dosing/flash mixing and aging system
  • Working Tanks for conditioning chemistry
  • Flotation Cell and SAF® Froth Generator
  • Positive Displacement Skimmed Solids Pump

Treatability Studies

  • In-house laboratory testing
  • Jar tests for determining polymer and flocculent dosing rates and additions for pH control
  • Analytical results developed to predict process performance and operating costs

Pilot Testing

  • Pilot scale testing offered to verify process performance and operating costs derived from laboratory tests
  • Trailer-mounted SAF® system equipped to handle flow rates ranging from 40 to 250 gpm with complete pH control, polymer dosing & aging, and a flotation tank offered for rental

Pilot testing using a trailer mounted Model SAF125 Suspended Air® Flotation (SAF®) Treatment System.  Capable of treating 250 gpm.  Contained and fully integrated are:

  • pH Control System with PID loops for acid and caustic feed
  • controlled outlets for coagulant feed/coagulation
  • polymer dosing/flash mixing/aging system supporting flocculation
  • flotation separation of suspended solids and associated BOD/COD
  • fully automated continuous operation including the starting/stopping system by remote signal/parameter.

Capabilities demonstrated:

  • Primary influent clarification in place of primary clarifier
  • Treatment of overflow pond return water containing algae/partially  digested raw influent
  • Clarification of activated sludge mixed liquor with concurrent  thickening of MLSS.
  • Digested sludge belt filter press filtrate and wash water clarification

System Capabilities and Services Provided

  • Engineering design of process and components.
  • AutoCAD drawings for mechanical and electrical fabrication.
  • Provision and operation of pilot trailer in 2012.
  • Custom fabricated welded stainless steel tanks and components.


(Click image to enlarge)

Overall Part Dimensions

Pilot trailer:
40 ft. L x 8 ft. W x 12 ft. 4 in. H

Tightest Tolerances

± 1/16 inches

Material Used

304 stainless steel, PVC, Polyurethane

Additional Facts

Feed System:
7.5 HP, 250 gpm pump with 4-in. magnetic flow meter,
pH control system with acid and caustic PID Loops
Conditioning Tank:
304SS, 1,800 gallons, 2-compartment with 2-turbine agitators.
Flotation Tank:
Model CF-125 ClearFloater™ Cross-Flow Flotation Cell with flocculation agitator, chain and flight skimmer, solids hopper, adjustable stainless steel weir, and observation decking.
SAF® Generator:
Model F50 (13.6 gpm froth flow rating).
Ancillary Equipment:
Polymer dilution and aging system; acid, caustic, polymer, and frothing agent metering pumps; float solids transfer pump; control panels


SAF demonstrated over 30 times the capacity of a conventional primary clarifier.  Algae removed from pond return water.  MLSS thickened to greater than 5% with half the polymer dosage of the plant’s own Gravity Belt Thickener and with greater solids capture.

Industry for Use

Industrial & Municipal Wastewater

Delivery/Turnaround Time

1 week

Previous Pilot Locations


Clearlake, CA
El Dorado Irrigation District, CA
Fortuna, CA
Manteca, CA
Tulare, CA


Artois, CA
Baltimore, MD
Cacye, SC
Chico, CA
Daphne, AL
Dodge City, KS
Fairfield, CA
Fresno, CA
Gridley, CA
Johnson Creek, WI
Lemoore, CA
Lexington, NE
Marshall, CA
Modesto, CA
Moultrie, GA
Spanish Fork, UT
Stockton, CA
Tulare, CA
White City, OR

Standards Met

Customer Specifications, 2D CAD Drawing