AWC-UF-428

Summary

Product identification

AWC® UF-428 is a Microfiltration (MF) / Ultrafiltration (UF) High pH Chlorinated Cleaning Compound. It is a powder formulation containing chlorine, dispersants, surfactants, and other cleaning compounds specifically designed for cleaning MF and UF surfaces and pores.

Advantages:

• Penetrates and removes heavy organic foulants and biological slime.
• Disperses inorganic particulates such as silts, clays, and other colloidal particles.
• Dissolves metal hydroxides from coagulants.
• Buffered to maintain target pH range even when accidentally overdosed.
• Compatible with most chlorine-tolerant MF and UF modules.
• Certified by NSF to NSF/ANSI Standard 60.

Typical Properties

• Appearance: White granular powder
• Odor: Chlorine like odor
• Solubility in water: Soluble
• pH (1% solution): 11 - 12
• Chlorine Content (1% Solution): 100 ppm available chlorine

Chemical Feeding and Control

The cleaning solution should be prepared using MF/UF filtrate. It is recommended to avoid using high hardness water for best results.

• Solution Preparation: 9–17 lbs of AWC UF-428 for every 100 gallons of water (~1–2 wt% Solution).
• Cleaning Time: A minimum total cleaning time of 3 hours is typically recommended for heavy fouling.
• Temperature: Heating the solution to the maximum temperature allowed by the module manufacturer will enhance cleaning results.

Cleaning Procedure:

1. Circulate the cleaning solution throughout the modules, with the filtrate valve closed, in the feed direction for 30 minutes (for tubular designs).
2. Alternate with soak for 30 minutes.
3. Reverse the direction of the flow and recirculate for 30 more minutes.
4. Repeat steps 1 – 3.

If pH decreases below the target pH range of 11–12, add more AWC UF-428 to maintain the target pH range throughout the entire cleaning process. Do not exceed the membrane manufacturer’s recommended exposure time to high pH cleaners, and do not exceed the membrane’s chlorine tolerance. If back-flushing is permissible by the manufacturer, cleaning results may be enhanced by back flushing the cleaning solution from the filtrate to the feed for 15 minutes. After cleaning, modules must be flushed 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. For more information, see the Safety Data Sheet provided with this product.

Packaging

• 50 lb. pails
• 400 lb. non-returnable plastic drums

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