CONTROL OF MICROORGANISMS

The basic reason for controlling the growth of microorganisms is to prevent problems associated with their growth. It is impractical to sterilize the water. We use microbiocide to keep the microbe level below where they will cause problems.

Microbiocides are used most effectively by adding them in slug doses, as opposed to continuous addition.

The frequency and amount of microbiocide added depend upon the number and types of microbes in a system, as well as system's characteristics. For instance, some towers may be prone to algae growth due to the amount of sunshine, outside temperature, and surrounding sources of contamination. Other towers in the same vicinity operating under the same apparent conditions may not have an algae problem at all.

Therefore, the dosing of microbiocides will depend more on the conditions in a particular cooling system than anything else. Some may require very frequent microbiocide addition, while some may be maintained with less frequent additions of microbiocide. As a rule it is easier and cheaper to prevent a microbe outbreak than to correct it. To do this, we normally add larger doses to a system more frequently as warm weather approaches, even though no problems are apparent.

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