Severe damage and failures occur in cooling water systems due to microbiologically influenced corrosion (MIC). This is one reason why a biocide program is critical for an effective cooling water treatment program, whether running or in idle/standby condition.

Cooling systems in standby due to lead-lag configurations are particularly susceptible to MIC. Stagnant water is ideal for the growth of slime-forming and sulfate reducing bacteria. These bacteria can cause severe fouling, which leads to reduced capacity and increased energy/maintenance costs.

Circulating a non-oxidizing biocide and inhibitor treated water through the off-line system weekly for one hour can be an effective means of controlling MIC related
problems. This can be accomplished by programming the building automation system to circulate the cooling water through the system while applying the appropriate amount of a non-oxidizing biocide. Contact a Chem-Aqua representative for specific advice on your cooling water system

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