RoClean® Membrane Cleaners


All reverse osmosis (RO) systems foul over time. Symptoms of fouling include a decrease in normalized permeate flow, an increase in salt passage, or an increase in differential pressure. Severe fouling may also cause irreversible damage to membranes, making effective cleanings difficult or impossible.

Avista RoClean® cleaners provide efficient and cost-effective removal of many different foulant and scales. All products are low foaming and membrane compatible. These products come in a variety of pHs and the line contains a liquid and powder product for most foulants and scales. RoClean cleaners are highly buffered and contain a unique blend of ingredients that wet and break up foulant, suspend the foulant in solution and disperse the foulant to prevent redeposition. A wide range of application approvals are held for the products including NSF and EN certification.

Case Studies

BWRO Plant – Cleaning Study

A brackish water reverse osmosis (BWRO) plant in eastern Spain suffered a significant loss of performance, with permeate flow rate dropping 40% and a consequent drop in recovery from 65% to 45%.

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Removing Silica Scale

A plant on Tenerife in the Canary Islands was suffering from fouling. A raw water analysis was taken and found to have high levels of silica present that had not been considered when designing the plant. It was concluded that the cause of the loss in performance was due to silica scaling.

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