AWC-UF-437

Summary

Product identification

• Product Name: AWC® UF-437
• Product Type: MF/UF Membrane Cleaning Compound

Advantages

• Concentrated liquid formulation for high pH cleaning of ultrafiltration and microfiltration membrane surfaces.
• Effective in removing stubborn biofilms and organic foulants.
• Particularly effective for removing metal oxide deposits in the pH range of 9 – 10.5.
• Buffered to prevent exceeding a pH of 12.
• Does not cause chemical hydrolysis of polypropylene and PVDF membranes.
• Compatible with most MF/UF modules.
• Certified by NSF to NSF/ANSI Standard 60.

Typical Properties

• Appearance: Clear yellow to amber liquid
• Odor: Slight Characteristic
• Solubility in water: Complete
• pH (as is) @ 25˚C: >12
• Specific Gravity: 1.20 ± 0.05

Chemical Feeding and Control

• Preparation: Use potable water free of residual chlorine or other oxidizing agents (RO permeate or DI water preferred). Do not use hard water.
• Concentration: 1-2 gallons of AWC UF-437 to every 100 gallons of water (1-2% solution), depending on fouling severity.
• Temperature: Heat water to the maximum temperature allowed by the module manufacturer.
• pH Adjustment:
  • Adjust pH to the highest level allowable by the membrane manufacturer.
  • To decrease pH: Use HCl (31% Muriatic acid), adding 0.1% by volume at a time. Mix thoroughly by recirculation before checking pH.
  • To increase pH: Use NaOH (50% Caustic Soda), adding 0.1% by volume at a time. Mix thoroughly by recirculation before checking pH.
  • Optimal iron removal occurs at pH of 9.0–10.5.
• Cleaning Procedure:
  • Circulate cleaning solution through modules with filtrate valve closed, in the feed direction for 30 minutes (for tubular designs).
  • Reverse flow direction; recirculate for 30 more minutes.
  • Repeat as necessary until desired cleaning results are achieved.
  • Add AWC UF-437 as needed to maintain the pH range.
  • For systems allowing back flushing, back flush with cleaning solution from filtrate to feed for 15 minutes.
  • After cleaning, flush modules with MF/UF filtrate.

Safety & Handling

• Store in a cool, dry, and well-ventilated area.
• Keep containers closed.
• Wash contaminated clothes before re-use.
• Wash thoroughly after handling.
• Refer to the Safety Data Sheet for more information.

Packaging

• 5 gallon pails
• 55 gallon non-returnable plastic drums
• 275 gallon totes

Disclaimer: This extraction may miss figures, footnotes, or revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror