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Ultrafiltration (UF)

Our UF systems are usually operated in a pressure range of 10 to 50 psig and they remove particulate via size exclusion down to as low as 0.02 ┬Ám. Typical flux (rate of finished water permeate per unit membrane surface area) for UF is 10-100 gallons per square foot per day (gfd).

Wigen UF membrane systems use advanced hollow fiber or ceramic technologies operated in the outside-in or inside-out direction of flow. Given the small membrane pore sizes used with these technologies, fouling due to deposition of organic and inorganic compounds on the membrane may occur if the system is not properly designed and operated. Therefore, we use automated backwashing, air scour and chemical flushing processes to maintain the rate of membrane fouling within acceptable limits. Chemical cleaning is employed once a maximum transmembrane pressure has been reached. Typical cleaning agents utilized include acids, caustic, surfactants, enzymes and certain oxidants, depending upon membrane material and foulant type.

Common Applications

  • Municipal drinking water filtration (meets US EPA LT2ESWTR)
  • Iron & Manganese Removal
  • Industrial Wastewater Recovery
  • COD Reduction
  • RO & NF Pre-treatment

Typical Features

  • Welded and Powder Coated Steel Skid Frames
  • High Quality Membrane Elements
  • Module Housings with Sampling Ports
  • Stainless Steel Feed Pump
  • Stainless Steel Schedule and/or 80 PVC Pipe Work
  • Automated Control Valves
  • Integrated Process Controls
  • Automatic Backwash System
  • Pressure Gauges
  • Flow Transmitters
  • Pressure Transmitters
  • (CIP) Clean-In-Place System with Heated Mixing Tank

Optional Features

  • U.L. 508A Control Panel Fabrication
  • Allen-Bradley® PLC/HMI/VFD Controls
  • Remote Data Interface via User-Defined Network Protocol
  • Redundant pumps
  • Feed and Process Tanks
  • Stainless Steel Skid Frames
  • VFD's
  • Hypochlorite & Acid Dosing
  • Coagulant Feed System
  • Gravity Drain Tanks