RoClean™ - Model P903 - Low pH Powderd Cleaner
From Cleaners - Powder
RoClean P903 is a low pH powdered cleaner designed to remove iron, manganese, and aluminum deposits from spiral wound polyamide and cellulose acetate elements. This formulation is temperature compensated to ensure that the cleaning solution remains in the effective pH range regardless of variations in solution temperature. RoClean P903 has been certified by NSF International under NSF/ANSI Standard 60 for use as an off-line cleaner in drinking water systems.
Performance Benefits
- Contains a proprietary blend of buffers, chelants, and odorless reducing agents to promote the dissolution of metal deposits.
- Superior results in the removal of metals, metallic clays and calcium carbonate scale, especially when compared to generic citric and hydrochloric acid solutions.
- Highly buffered to resist pH changes during the cleaning process.
- Compatible with polyamide and cellulose acetate membranes.
- Suitable for use with other Avista cleaners.
Instructions for Use
Storage
Below is a summary of the RoClean P903 cleaning 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 deinoized water. Heat the solution to the maximum acceptable temperature (see membrane manufacturer guidelines), as this will dramatically increase cleaning efficiency. Add sufficient RoClean P903 to create a 2% wt/wt solution if the fouling is moderate to severe or a 1% if the fouling is mild. Recirculate the solution through the cleaning tank to ensure adequate mixing.
2. Run the cleaning 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:
3. If the membranes are heavily fouled and the recirculated cleaning solution becomes discolored or turbid, discard as much as 15% of the solution volume. Heavily fouled elements may also benefit from a soaking period (up to 8 hours).
4. Monitor the pH of the solution during the cleaning process. If the pH remains in the desired range and the solution is not turbid, it may be used to clean subsequent stages. In the unlikely event that the pH rises, prepare a new batch and repeat steps 1-4.
5. When cleaning is complete, rinse the membranes by flushing RO permeate through each pressure vessel. The system can then be returned to service.
Technical Specifications
Packaging and Storage
Standard regional pack sizes are listed below. Information on drumless or bulk tanker delivery is available on request.
Specifications
- Appearance: White powder
- pH (2% solution): 2.5 - 3.5
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