Understanding the Depurator (ACTOX) Water Treatment System: A Technical Review for Swimming Pools and Bio Pools

Introduction

Depurator water treatment – In recent years, the swimming pool industry has witnessed the emergence of several alternative water treatment technologies aimed at reducing or eliminating the dependence on chlorine. One such technology attracting attention is the Depurator, marketed under the proprietary ACTOX® process.

The Depurator is promoted as a chemical-free or chlorine-free water purification system capable of delivering crystal-clear, hygienic swimming pool water while reducing maintenance costs and improving swimmer comfort. While these claims are promising, it is important to understand the technology from an engineering perspective before specifying it for commercial or residential projects.

This article explores available information about the Depurator system, its potential advantages, and the technical questions that should be addressed before its adoption.

What is a Depurator?

The term “Depurator” simply means a purification or water treatment system. In conventional swimming pool engineering, water depuration consists of four essential processes:

• Water circulation
• Mechanical filtration
• Oxidation of contaminants
• Microbiological disinfection

The Depurator marketed under the ACTOX® technology claims to combine oxidation and disinfection without relying on conventional chlorine dosing.

According to the manufacturer, the system offers:

• Chlorine-free water treatment
• Elimination of unpleasant chlorine odours
• Reduced eye and skin irritation
• Lower chemical consumption
• Reduced filter backwashing
• Lower water consumption
• Lower maintenance costs
• Improved swimming comfort

These claims make the technology particularly attractive for luxury residential pools, wellness facilities and bio swimming pools.

Understanding ACTOX Technology

Based on the information presently available, ACTOX appears to operate as an Advanced Oxidation Process (AOP).

Advanced oxidation technologies typically generate extremely reactive oxidising agents capable of destroying microorganisms and breaking down dissolved organic contaminants.

Depending on the technology employed, these oxidants may include:

• Ozone (O₃)
• Hydroxyl radicals (•OH)
• Atomic oxygen
• Hydrogen peroxide (H₂O₂)
• Other reactive oxygen species (ROS)

These oxidants possess significantly higher oxidation potential than conventional chlorine.

However, the manufacturer has not publicly disclosed the complete chemical mechanism of the ACTOX process, making independent technical evaluation difficult.

Oxidation Versus Residual Disinfection

One of the most important concepts in water treatment is understanding the difference between oxidation and residual disinfection.

Oxidation destroys:

• Organic pollutants
• Body oils
• Cosmetics
• Sweat
• Dissolved contaminants
• Some microorganisms

Residual disinfection, on the other hand, provides continuous protection throughout the swimming pool by maintaining an active disinfectant concentration in the water.

For example:

• Chlorine provides both oxidation and a measurable disinfectant residual.
• Ozone is an excellent oxidiser but has little or no residual once it decomposes.
• UV systems disinfect water only while it passes through the reactor and provide no residual protection.

Whether ACTOX provides any measurable residual disinfectant throughout the pool remains an important technical question.

Can the Depurator Replace Filtration?

The simple answer is No.

Regardless of the disinfection technology used, every swimming pool continuously receives contaminants such as:

• Dust
• Leaves
• Hair
• Skin cells
• Sunscreen
• Organic debris
• Suspended solids
• Microorganisms

These contaminants must first be removed through proper mechanical filtration.

A typical treatment train should therefore remain:

Swimming Pool → Skimmers & Bottom Drains → Pump → Mechanical Filter → Depurator (ACTOX) → Return to Pool

For bio swimming pools, biological filtration would normally remain an essential component of the treatment process.

Potential Advantages

If the manufacturer’s claims are validated, the Depurator may offer several practical advantages:

• Reduced dependence on chlorine
• Improved swimmer comfort
• Reduced chloramine formation
• Lower chemical storage requirements
• Lower operating costs
• Reduced filter maintenance
• Reduced water consumption through less frequent backwashing
• Improved oxidation of dissolved organic contaminants

These advantages make the technology worthy of serious investigation.

Important Technical Questions

Before specifying the Depurator for a project, engineers and consultants should seek clarification on several technical aspects.

These include:

1. Working Principle

• What exactly is the ACTOX process?
• Which oxidants are generated?

2. Ozone Generation

• Does the system generate ozone?
• If yes, what concentration is produced?

3. Residual Disinfection

• Does any measurable disinfectant remain in the pool water after treatment?

4. ORP Performance

• What Oxidation Reduction Potential (ORP) is maintained during operation?

5. Hydraulic Requirements

• Recommended flow rate
• Contact time
• Pool turnover rate

6. Microbiological Performance

Independent laboratory testing against organisms such as:

• Escherichia coli
• Pseudomonas aeruginosa
• Legionella

would help verify disinfection efficiency.

7. Water Chemistry

Information regarding:

• By-product formation
• Bromate production
• Chloramines
• Total Organic Carbon reduction

would provide valuable insight into the system’s long-term performance.

8. Compatibility with Biological Filtration

For natural swimming pools and bio pools, it is important to determine whether the oxidants generated by ACTOX could negatively affect beneficial nitrifying bacteria within biological filters.

9. Suitability for Aquatic Life

If the technology is proposed for koi ponds or ornamental water bodies, independent confirmation should be obtained regarding:

• Residual oxidant levels
• Fish safety
• Plant compatibility

How Does the Depurator Compare with Conventional Technologies?

Professional Assessment

The Depurator represents an interesting development in alternative swimming pool water treatment. Its emphasis on advanced oxidation and reduced chemical usage aligns well with the growing demand for environmentally responsible and swimmer-friendly pool systems.

However, from the publicly available information, there is currently limited independent technical documentation explaining the exact chemical reactions involved, the oxidants generated, the level of residual disinfection achieved, and the long-term operational performance under varying pool conditions.

For consulting engineers, designers and pool professionals, obtaining comprehensive technical data—including system schematics, laboratory validation, microbiological test reports, hydraulic design parameters and certification—is essential before recommending the technology for critical applications.

Conclusion

The Depurator (ACTOX®) system appears to be a promising addition to modern swimming pool water treatment technologies, particularly where chlorine reduction and improved water quality are desired.

At present, it should be viewed as a potentially effective advanced oxidation and disinfection stage, rather than a replacement for sound engineering principles. Proper hydraulic design, adequate circulation, efficient mechanical filtration and, where applicable, biological filtration remain fundamental to achieving safe and sustainable water quality.

As with any emerging technology, independent performance data and transparent technical documentation will ultimately determine its place within the future of swimming pool and bio pool water treatment.