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BDS 6208 is an effective biocide for controlling algae and slime growths. It is a liquid, non volatile, water soluble compound with the added advantages of being non-toxic and non-irritating. It has a high degree of bactericidal and bacteriostatic activity, and is effective against a wide variety of bacteria, fungi, seaweed and algae. It is a mixture of quaternary ammonium chloride compounds and other biocidal agents in a stable buffered solution.

BDS 6208 may be used in any system without the need for costly, special feeding equipment.

Since BDS 6208 is non-volatile, its concentration in a cooling system is independent of the circulation rate. The concentration is decreased by bleed-off, by reaction with growths, and by absorption upon the interior surfaces of the system. Effective treatment requires attaining a relatively high concentration in the system for a short length of time, rather than maintaining a small residual continuously.

When initiating the use of BDS 6208 in any system, it is essential that a higher treatment rate be followed for a period of 4 to 6 weeks. This schedule will serve not only to remove heavy infestations of slime and algae growths, but will also make it possible to saturate the surfaces of the system with BDS 6208.

BDS 6208 should be added in massive periodic dosages in concentrations of 20 to 40 parts per million. This would be equivalent to one pint of BDS 6208 per 3000 gallons of water entering the system based on the activity of the product.

Normal bleed-off from a cooling tower is calculated at one-half of one percent to one percent of the total water circulated. The circulation rate, if not known, is estimated at 3 gpm per ton of refrigeration. This information, together with evaporation losses, should be used to calculate the amount of BDS 6208 to be added.

Many of the chemicals which are being used for algae control exhibit an initial period of apparent effectiveness, followed by renewed growth of the organisms. Due to mutation of the organism, such renewed growth indicates the development of resistant microbiological strains. These slime and algae deposits will promote corrosion since they liberate oxygen. Even some of the ordinary treating chemicals, such as chlorine, are themselves corrosive, frequently attacking the wooden surfaces of the cooling tower, causing delignification. Many are also toxic and irritating, such as organometallic compounds, requiring special handling precautions.

Compatible with most water treatment products, except anionic surfactants.

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