The Efficacy of Ozone for the Treatment of Process Water in Evaporative Cooling Systems

A study at Washington & Lee University: This paper describes a comparative study conducted at Washington and Lee University that measured the effectiveness of ozone when compared to traditional chemical treatment for evaporative cooling systems.

University of Pittsburgh Study

A study conducted by researchers at the University of Pittsburgh suggests that this diverse class of water-treatment devices may be ineffective and can allow dangerous bacteria to flourish in the cooling systems of hospitals, commercial offices, and other water-cooled buildings almost as much as they do in untreated water.

Case Study: Loudoun County Public Schools

Beginning in early 2000, Loudoun County Public Schools began testing an alternate to the traditional chemical treatment programs on their cooling towers on new construction of Elementary and Middle schools.

Case Study: Dominion Virginia Power Corporate Office Building

In January of 1997, Zentox Corporation replaced a traditional chemical treatment program at a major utility corporate office building with an ozone water treatment system that centered on the Clean Streams™ Ozone Transfer Process. The cooling towers, located on the roof of a 22 story building, were experiencing fouling of the fill that restricted air flow and required quarterly cleaning to prevent reduced cooling efficiency.

Case Study: Vehicle Assembly Building, Kennedy Space Center

In January of 2000, Zentox Corporation replaced the existing ozone treatment system on the Vehicle Assembly Building (VAB) and Launch Control Center (LCC) cooling towers with a state-of-the-art ozone water treatment system that is centered on the Clean Streams™ Ozone Transfer Process. The cooling towers, a launch critical system located adjacent to the VAB, had been on ozone treatment since 1992, but the old ozone system had not performed to KSC standards for many years.

Ozone for Cooling Tower Systems - Kennedy Space Center

The operational experience and performance of the successful use of ozone as a stand-alone cooling water treatment method are discussed. Unlike conventional chemical programs, ozone treatment based upon applied rates and dosages remain controversial, but case studies continue to explore and validate this emerging technology.

Corrosion Test Coupons

Corrosion coupons are an inexpensive, effective method for monitoring corrosion rates. The relative corrosivity of water in cooling systems, closed systems, condensate return systems, or any aqueous system, can be evaluated by measuring the weight loss of metal coupons installed in the systems. The evaluation does not give precise corrosion rates of system’s metal, but the results are very useful for comparative purposes.

Biofilm and Reduced Energy Efficiency

What is Biofilm and why Ozone use is a more efficient means of controling it?