A medical center operates a cooling system with a total capacity of 2,100 tons. Bacteria control was an issue, with water in a cold well sump exhibiting a strong odor due to out-of-control bacteria activities and the presence of biofilm.

A CHC 125-GPM unit and automatic filtration system were installed on the cooling tower system in April 2004.

Significant improvement in water quality was noticed in three weeks. Odor was gradually eliminated. Monthly bacteria analysis showed counts less than 4,000 CFU/ml, well below the control limit of 10,000 CFU/ml. Chillers were opened after eight months and no evidence of corrosion or scale observed.

Cycles of concentration increased from 5.0 to 6.8 with the CHC system. Annual water savings for the customer exceed 900,000 gallons. The customer also reduced blow down by over 35%.