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Cooling Towers Application

Ozone + AOP for Cooling Towers

(Download Cooling Tower Spec Sheet)

A truly sustainable technology, Ozone and Advanced Oxidation Processing (AOP) offers a safer, greener, and more effective alternative for the operation and performance of cooling towers. Generated on-site, Prozone’s Ozone+AOP systems provide an overall reduction in chemical requirements and operating costs by destroying biofilms, reducing corrosion and scaling, and deactivating harmful pathogens such as Legionella Pneumophilla and Cryptosporidium parvum.

HVAC Cooling Towers

The Hybrid Advanced Oxidation Solution

Ozone has long been recognized as the most powerful, readily available oxidation method. It is capable of destroying the most common contaminants and is far better than the classical chemical oxidizers. Yet some of the most toxic contaminants are still difficult to destroy, even with ozone. By combining two technologies of ozone generation and low pressure Germicidal UV-C, the Advanced Oxidation Process (AOP) has emerged as the ultimate process to oxidize and sanitize difficult to remove contaminants. AOP is the conversion of ozone by Germicidal UV-C, in the presence of water, to form high energy hydroxyl radicals. It is the most powerful oxidation/sanitation process available for both water and air.

The Advanced Oxidation Process combines Ozone and Ultra Violet light to instantly destroy or burn up bacteria and other pollutants
Advanced Oxidation Process diagram

Ozone + AOP on Biofilms and Bacteria Treatment

Advanced oxidation processes may be defined as powerful sanitizers and oxidizers produced from ozone after a series of chemical reactions. The products of AOP are extremely reactive in nature. This characteristic is what makes AOP extremely effective in attacking and disrupting biofilms as well as killing all the hazardous microorganisms associated with it.
Biofilms may be thought of as “bacterial cities” where microorganisms shield and protect themselves from the outside environment. Known to harbor bacteria such as Legionella pneumophila and Pseudomonas aeruginosa, biofilms are not just limited to bacteria. Fungus, mold and viruses are also associated with biofilms. Their adhesive nature is due to outer sugar chains of the bacteria, which mesh together forming what could be considered the infrastructure for the bacterial city.
Ozone and Hydroxyl Radicals work like a knife or scissors, physically cutting through the biofilms ripping them apart to individual bacteria. As the oxidizers produced from AOP come into contact with these microorganisms, the Hydroxyl Radical attacks the cell wall of the organism, breaking it down in a process known as cell lysing. Once the cell wall is penetrated, the cell’s cytoplasm is released and the cell expires almost instantly. Ozone and Hydroxyl Radicals attack the microorganism like a shotgun, bursting their membranes and spilling their contents. Ozone and Hydroxyl Radicals are particularly potent anti-microbial agents because organisms cannot develop a resistance to it.

Biofilms Formation
Biofilms Diagram


  • Reduces expensive storage and transport costs of chemicals
  • Recycles oxidizers such as Chlorine or Bromine
  • Effectively aids in the reduction of algae growth
  • Remediates microbial growth
  • Destroys biofilms
  • Reduction of corrosion in the pipes and heat exchangers
  • Elimination of existing scale and prevent its reoccurance
  • Improves heat transfer performance
  • Environmentally Friendly technology; its only byproduct is oxygen
  • Extremely effective disinfectant at relatively low concentrations

About Prozone Water Products Treatment

As pioneers in Ozone, Germicidal UV-C, and Advanced Oxidation Process technologies, Prozone Water Products has consistently provided unique solutions to its customers for the past forty years. As leaders in the industry, Prozone provides technical innovations and holds patents for all design elements involving UV/Ozone Advanced Oxidation Processors and Corona Discharge Ozone Generators. Prozone’s reputation for ozone systems engineered with simplicity and effectiveness have become the industry standard for cost effective and easily implemented ozone systems.


Corona Discharge:

Prozone’s Corona Discharge System is ideal for high ozone concentration requirements. Unique to this system is Prozone’s patented Dual Flat Plate CD Corona Cube and onboard Oxygen Concentrator. Prozone’s Corona Discharge systems provide higher energy efficiencies than its competitors and therefore deliver a simpler system with no need for water cooling.

Patented Corona Cube photo

Hybrid Advanced Oxidation Systems:

Prozone’s patented Hybrid Advanced Oxidation Ozone Generators produce both Ozone and Hydroxyl Radicals. Due to addition of Hydroxyl Radicals, these systems produce high concentrations of ozone while still maintaining the reliability of VUV technology. Simpler in design, these systems have no need for Oxygen Concentrators or Air Dryers because they produce no harmful byproducts during Ozone/Hydroxyl generation.

PZ2-24 Hybrid Skid photos

Both Systems Have Complete Skid Mount Package to include:

  •  Counterflow System including Prozone’s patented Dynamic Venturi Injector and Static Mixers which provide high efficiency contacting to ensure that the Ozone and AOP Radicals generated are utilized.
  • Circulation Pump guaranteeing adequate flow rates through the contactor included as well as a
  • Degas Column for removing any residual Ozone or AOP Radicals from the water.
Patented Counterflow System

Design Benefits:

  • Easy operation and installation with few training requirements
  • Rugged, low maintenance and easy to service due to its modular design
  • Can be quickly added to existing circulation systems
  • Offers several installation methods such as direct injection, bypass, or diffusion into the tower basin
ozone generators clean air and water
ozone generators clean air and water
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