ROCLEAN

RoClean L102

Low pH RO Membrane Cleaner - Liquid

RoClean L102 is a low pH liquid formulation designed to remove biological foulants from spiral wound thinfilm elements or to preserve elements for storage.

It is important to remove scale and metal deposits from membrane surfaces before application of RoClean L102. This can be accomplished with RoClean L403, RoClean P303 or RoClean L811. Avista personnel can assist with product selection.

Elements preserved with RoClean L102 and shipped via common carrier do not require a corrosive label. A third party, independent laboratory has confirmed that a 2% solution of RoClean L102 is not corrosive.

Performance:

RoClean L102 offers an array of performance benefits:

• Compatible with the thinfilm (polyamide) elements produced by the major membrane manufacturers.
• Contains a special blend of biodispersant agents.
• Highly buffered to resist pH changes during the usage process.
• Can be used in conjunction with other applicable cleaners to remove combination foulants.
• Temperature compensated to maintain optimum pH over a wide temperature range.

Use Instructions:

Below is a summary of the RoClean L102 usage guidelines. For detailed procedures, please consult the Avista technical bulletin entitled "Cleaning of Spiral Wound Membrane Systems":

1. Fill the cleaning tank to the desired volume with RO permeate or DI water. Heat the solution to 50°C as this will dramatically increase the efficiency. Add the RoClean L102 to the tank at a rate of approximately 1 gallon per 50 gallons of water. Recycle the solution through the cleaning tank to ensure adequate mixing.
2. Recirculate the solution through each RO system stage, one at a time, for a minimum of 60 minutes at the flow rate recommended by the membrane manufacturer. If that rate is not known, use the guidelines listed below:

   Element Diameter (Inches)	Flowrate per Vessel GPM (LPM)
   4	10 (38)
   8	40 (151)

3. Monitor the pH of the solution during the treatment process. If the pH remains in the desired range of 2.0 to 2.5 and the solution is not turbid, it may be used to clean subsequent stages. In the unlikely event that the pH rises above 2.5, prepare a new batch and repeat steps 1 - 4.
4. When the treatment is completed, rinse the membranes by recirculating RO permeate through each pressure vessel. The system can then be returned to service.

Packaging:

RoClean L102 is available in 45 pound pails and 500 pound drums.

Properties:

10/08