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• Highly effective maintenance solution for polyamide, polyaramid and cellulose acetate membranes.
• Effective in removing organic coagulants from membrane surfaces.
• Buffered to maintain an effective pH over a range of dilutions.
• Liquid cleaner which allows shorter mixing time.
• No adverse effects with repeated use.
Removes biological and other organic foulants from water treatment systems to extend run times. Optimum results are achieved when KleenTM MCT882 is used in conjunction with BioMate MBC2881, Kleen MCT411 and Kleen MCT511.
◇TYPICAL APPLICATIONS
During the operation of a membrane separation or ultrafiltration system, organic materials that may be present in the feedwater can accumulate on the membrane surface. The presence of organics also provides an environment conducive to microbiological activity which results in microbiological fouling. Fouling impedes the flow of water through the membrane. This can result in unacceptably low production, high operating pressure, or an excessive pressure drop in the system, which may lead to irreversible membrane damage. Additionally, the accumulation of foulants on the membrane surface can increase the amount of dissolved material passing through the membrane, resulting in product water of unacceptable quality. Before organic and foulants and debris can accumulate to a level where product water declines or membrane damage can occur, it should be removed through a clean-in-place (CIP) off-line cleaning. Indications of the need for cleaning include a significant decrease in normalized permeate flow, a significant increase in pressure drop across the system (or individual stage), or an increase in the normalized salt passage, such that product quality is unacceptable.
Kleen MCT882 contains a blend of solubilizing agents designed to specifically remove organic foulants from the surfaces of the membrane. Used in tandem with an alkaline cleaner for particulate removal, regular cleanings with Kleen MCT882 can help to preserve the life of your membranes.
Depending on the nature of the fouling, a soak period may be necessary for optimum results. Consult your BetzDearborn representative for details.
Kleen MCT882 is not a biocide. If sterilization of the membrane and equipment surfaces is desired, contact your BetzDearborn representative for information.
◇FEED REQUIREMENTS
Feed System-This product should be used in conjunction with the membrane cleaning equipment supplied by the manufacturer of the membrane system. If such a system is not present, contact your BetzDearborn representative for information on fabricating or obtaining a cleaning system.
Dilution-The product must be diluted prior to introduction into the membrane system. The recommended dilution for this product is 5 pounds (2.3kg) of Kleen MCT882 per 5 gallons (19L) of water or approximately one gallon (3.8L) of Kleen MCT882 for each 9 gallons (34L) of water.
Materials Compatibility-Corrosion-resistant equipment, such as PVC, should be used for the storage and preparation of this product. Pumping materials coming in contact with the concentrated or diluted products should also be corrosion resistant.
◇PACKAGING INFORMATION
Kleen MCT882 is a liquid material, available in a wide variety of customized containers and delivery ethods. Contact your BetzDearborn representative for details.
◇GENERAL CLEANING INSTRUCTIONS
The following general cleaning procedure can be followed.For the optimum cleaning procedure for your system, contact your BetzDearborn representative.
1. Inspect cleaning tank, hoses, and cartridge filters. Clean tank and flush hoses if necessary. Install new cartridge filters.
2. Fill cleaning tank with RO permeate or DI water. Turn on agitator or tank recirculation pump.
3. Slowly add Kleen MCT882 to cleaning tank (1gal[3.8L] of product for every 9 gal [34L] of water) and allow to mix thoroughly.
4. Check solution temperature. If solution temperature is lower than recommended level, adjust heating control to provide optimum temperature. If manufacturer's recommendation is not available, contact your BetzDearborn representative.
5. Check solution pH. The solution pH should be 2 to 3 or as recommended by the membrane manufacturer. If pH is too low, adjust pH upward with NaOH, or other chemical as recommended by the membrane manufacturer. If pH is too high, adjust with hydrochloric acid.
6. 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. If the manufacturer's recommendation is not available, contact your BetzDearborn representative. Pressure should be low enough so that no permeate is produced during cleaning, but always less than 60 psig (4.2kg/cm2). In cases of heavy fouling, the first return flow (up to 15% of the cleaning tank volume) should be diverted to drain to prevent redeposition of removed solids. For optimum results, each stage must be cleaned separately in a multistage system.
7. If the first stage cleaning solution becomes turbid or discolored, dump the tank and prepare a fresh cleaning solution before proceeding. If 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.
8. Rinse with RO permeate before returning system to service.
9. When returning unit to service, divert product water to drain until any residual cleaning solution has been rinsed from system.
◇SAFETY PRECAUTIONS
A Material Safety Data Sheet containing detailed information about this product is available upon request. |
