SAF® System Pilot Testing For
Water and Wastewater Applications

  • 350 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
  • Serpentine-Style Floc Mixer
  • 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 350 gpm with complete pH control, polymer dosing & aging, and a flotation tank offered for lease

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
  • 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

Material Used

304 stainless steel, PVC, Polyurethane


Feed System:
7.5 HP, 250 gpm pump with 4-in. magnetic flow meter,
pH control system with acid and caustic PID Loops
Floc Mixer:
Serpentine-Style Floc Mixer, 4″ diameter, Plug flow, 100′ long, schedule 80 PVC.
Flotation Tank:
Model CF-125 ClearFloater™ Cross-Flow Flotation Cell with ClearMixer®, 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® demonstrates over 30 times the capacity of a conventional primary clarifier.  Algae removed from pond less than 0.5 NTU.  MLSS thickens using less polymer and with greater solids capture.

Industry for Use

Industrial & Municipal Water and Wastewater

Delivery/Turnaround Time

1 week

Previous Pilot Locations
(Partial List)


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