AWC-UF-431

Summary

Product identification

AWC® UF-431 is a concentrated liquid formulation designed for use as a high pH cleaner of ultrafiltration and microfiltration membrane surfaces. It is certified by NSF to NSF/ANSI Standard 60.

Advantages

• Highly effective at dispersing colloidal clays and other suspended particles.
• Works to remove the most stubborn biofilms and organic foulants.
• Supports the cleaning of acid insoluble sulfates of calcium, barium and strontium as well as calcium fluoride.
• Especially effective in removal of metal oxide deposits when used in a pH range of 9.0 – 10.5.
• Buffered to maintain pH range even when product is accidentally overdosed.
• Compatible with most MF/UF modules.

Typical Properties

• Appearance: Clear light yellow liquid
• Odor: Slight characteristic
• Solubility in water: Complete
• pH (as is) @ 25˚C: >12
• Specific Gravity: 1.20 ± 0.10

Chemical Feeding and Control

• Prepare cleaning solution using potable water that is free of residual chlorine or other oxidizing agents (RO permeate or DI water is preferred). Do not use hard water.
• Add 1-2 gallons of AWC UF-431 to every 100 gallons of water (1-2 % solution), depending on severity of fouling.
• Heat water to the maximum temperature allowed by the module manufacturer.
• Adjust pH to the highest pH allowable by the membrane manufacturer.
• To adjust pH downwards, use HCl (31% Muriatic acid) and add only 0.1% by volume at a time. Mix thoroughly by recirculation before checking pH.
• To adjust pH upwards, use NaOH (50% Caustic Soda) and add only 0.1% by volume at a time. Mix thoroughly by recirculation before checking pH.
• Circulate cleaning solution throughout the modules with the filtrate valve closed, in the feed direction for 30 min (for tubular designs).
• Reverse direction of flow and recirculate for 30 more minutes. Repeat as necessary.
• Add AWC UF-431 as necessary to the cleaning solution to maintain the pH range. Optimal iron removal occurs at pH of 9.0 – 10.5.
• For systems allowing back flushing, back flush with cleaning solution from the filtrate to the feed for 15 minutes.
• After cleaning, flush modules with MF/UF filtrate.

Packaging

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

Safety & Handling

• Store in a cool, dry and well ventilated area.
• Keep containers closed.
• Wash contaminated clothes before re-use.
• Wash thoroughly after handling. For more information, see the Safety Data Sheet provided with this product.

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