Filmtec membrane cleaning procedure


  • How To Clean Reverse Osmosis (RO) Membranes
  • Reverse Osmosis Chemicals: Membrane Cleaning Chemicals
  • Search How To Clean Reverse Osmosis RO Membranes Successful membrane cleaning relies on both the effectiveness of the cleaning compounds, their professional application and the design and operation of the cleaning equipment. For the best results, RO membrane cleaning should be performed with both high and low pH cleaning chemicals. High pH RO Water Purifier Cleaning The high pH Cleaning is performed in order to remove biological or organic foulants, both of which contain carboxylic functional groups.

    Weak acids will gain an anionic charge at the high pH allowing them to disperse. High pH cleaning chemicals chelate the calcium that bridges foulants and biofilms to each other and to the membrane surface. Commodities such as NaOH are only mildly effective because of their inability to remove the calcium bridging.

    However organic foulants can lose their anionic charge if a low pH cleaning is performed first and can end up being compacted into the membrane. To find out which option is best for your system Complete Water Solutions can evaluate your system , including performing a foulant analysis.

    This will allow for the maximum flow velocity during cleaning. If both stages of a system with a array are cleaned simultaneously, each pressure vessel in the second stage will receive twice the flow velocity as the first stage. This would in turn cause membrane telescoping in the second stage if the first stage elements are cleaned at optimal flow velocity.

    Alternately, by basing the flow velocity on the second stage, the first stage membranes would not receive sufficient surface scouring. Chemical Cleaning RO Membranes - Step By Step Procedure The following general chemical cleaning procedure can be followed, however, to determine the optimum cleaning procedure for your RO system, contact Complete Water Solutions at today!

    Inspect cleaning tank, hoses, and cartridge filters. Clean tank and flush hoses if necessary. Install new cartridge filters. Fill the cleaning tank with RO permeate or DI water. Turn on the agitator or tank recirculation pump. Slowly add your selected RO cleaning product to the cleaning tank based on the CIP total volume and the product strength needed and allow it to mix thoroughly. Check solution temperature. If the solution temperature is lower than the recommended level, adjust heating control to provide the optimum temperature.

    Check the pH of the solution. If pH is too low, adjust pH upward with sodium hydroxide NaOH or another chemical as recommended by the membrane manufacturer.

    Circulate solution through one stage at a time in the direction of feed flow for 30 minutes. Circulate at the flow rate recommended by the membrane or system manufacturer. Pressure should be low enough so that minimal permeate is produced during cleaning, but always less than 60 psig [4. For optimum results, each stage must be cleaned separately in a multistage system.

    If the first stage cleaning solution becomes turbid or discolored, dump the tank and prepare a fresh cleaning solution before proceeding. If the solution pH or temperature moves out of the recommended range, a new solution should be prepared. In any event, a new cleaning solution should be prepared for each stage. Rinse with RO permeate before returning the system to service. When returning unit to service, divert product water to drain until any residual cleaning solution has been rinsed from the system.

    Depending on the nature of the fouling, a soak period may be necessary for optimum results. Consult Complete Water Solutions for further details. Downloads Need to download the PDF? Follow the two simple steps below. Step 1.

    Consolidated Water Solutions manufactures specialty reverse osmosis membrane cleaners. These proprietary blends are widely used in all types of industries, and our customers have experienced excellent results and huge savings. Even with the best feed water and pretreatment procedures in place, contaminates will inevitably build up on the RO membrane surface, producing plugs and dramatically reducing flow rate.

    Effective membrane cleaners and procedures can improve recovery and rejection rates, protect from irreversible fouling, and will prolong the life of the membranes. While smaller membranes should just be replaced, it is much more cost-effective to regularly use a membrane cleaner on larger water treatment systems.

    Low pH solutions dissolve membrane scales, such as calcium carbonate and metallic oxides. High pH cleaners clean foulants like colloids and biological microorganisms.

    Consolidated Water Solutions offers both types of cleaners in either liquid or powder form, as well as a specialty formulated dual low and high pH cleaner. Most of our products are NSF certified for drinking water applications. We also offer an off-site membrane cleaning service. Call us at for details. Contact Consolidated Water Solutions Want more information on what type of membrane cleaner is right for your RO system? Get in touch with one of our helpful experts. Contact Us Ion Exchange Avoid scale buildup in your current water filtration system with the help of an ion exchange system.

    Check out how our ion exchanges can serve your water treatment needs.

    Search How To Clean Reverse Osmosis RO Membranes Successful membrane cleaning relies on both the effectiveness of the cleaning compounds, their professional application and the design and operation of the cleaning equipment. For the best results, RO membrane cleaning should be performed with both high and low pH cleaning chemicals. High pH RO Water Purifier Cleaning The high pH Cleaning is performed in order to remove biological or organic foulants, both of which contain carboxylic functional groups.

    Weak acids will gain an anionic charge at the high pH allowing them to disperse. High pH cleaning chemicals chelate the calcium that bridges foulants and biofilms to each other and to the membrane surface. Commodities such as NaOH are only mildly effective because of their inability to remove the calcium bridging.

    How To Clean Reverse Osmosis (RO) Membranes

    However organic foulants can lose their anionic charge if a low pH cleaning is performed first and can end up being compacted into the membrane. To find out which option is best for your system Complete Water Solutions can evaluate your systemincluding performing a foulant analysis.

    This will allow for the maximum flow velocity during cleaning. If both stages of a system with a array are cleaned simultaneously, each pressure vessel in the second stage will receive twice the flow velocity as the first stage. This would in turn cause membrane telescoping in the second stage if the first stage elements are cleaned at optimal flow velocity.

    Alternately, by basing the flow velocity on the second stage, the first stage membranes would not receive sufficient surface scouring. Chemical Cleaning RO Membranes - Step By Step Procedure The following general chemical cleaning procedure can be followed, however, to determine the optimum cleaning procedure for your RO system, contact Complete Water Solutions at today! Inspect cleaning tank, hoses, and cartridge filters.

    Clean tank and flush hoses if necessary. Install new cartridge filters. Fill the cleaning tank with RO permeate or DI water.

    Turn on the agitator or tank recirculation pump. Consolidated Water Solutions manufactures specialty reverse osmosis membrane cleaners. These proprietary blends are widely used in all types of industries, and our customers have experienced excellent results and huge savings.

    Even with the best feed water and pretreatment procedures in place, contaminates will inevitably build up on the RO membrane surface, producing plugs and dramatically reducing flow rate.

    Reverse Osmosis Chemicals: Membrane Cleaning Chemicals

    Effective membrane cleaners and procedures can improve recovery and rejection rates, protect from irreversible fouling, and will prolong the life of the membranes. While smaller membranes should just be replaced, it is much more cost-effective to regularly use a membrane cleaner on larger water treatment systems.

    Low pH solutions dissolve membrane scales, such as calcium carbonate and metallic oxides. High pH cleaners clean foulants like colloids and biological microorganisms.


    thoughts on “Filmtec membrane cleaning procedure

    Leave a Reply

    Your email address will not be published. Required fields are marked *