Advanced ozone oxidation technology uses ozone as the core oxidant to treat organic pollutants and microorganisms in water. Its core mechanism relies on ozone's strong oxidizing property, which can directly oxidize pollutants or indirectly generate active species such as hydroxyl radicals (OH), effectively decomposing organic pollutants into harmless small molecules.

Compared with traditional water treatment technologies, ozone technology offers significant advantages:

• Strong oxidizing power: effectively degrades refractory organic and inorganic substances;

• Fast reaction: greatly shortens the treatment cycle;

• Green and safe: decomposition products are mainly oxygen, with no harmful by-products;

• Improved water quality: effectively removes color and odor and increases transparency;

• Flexible adaptability: the system is highly adjustable and suits different water-quality needs;

• Reduced disinfection by-products: compared with chlorination, it significantly reduces formation of trihalomethanes, etc.

Therefore, ozone technology has broad application prospects in drinking-water purification, industrial wastewater treatment, and advanced treatment of municipal wastewater plant effluent.

Ozone preparation room of a SINOKLE oilfield wastewater treatment project

However, ozone technology also faces practical challenges: low ozone utilization, high treatment cost, and large initial equipment investment. Heterogeneous ozone catalysis is an innovative solution to these challenges. By introducing solid catalysts, this technology significantly improves efficiency:

• Improves ozone utilization and reaction rate: the catalyst promotes ozone decomposition to generate more OH, enhancing oxidation performance and accelerating the reaction.

• Reduces cost: the increased reaction rate lowers the required ozone dosage and energy consumption; the catalyst itself is usually highly stable and durable, reducing replacement frequency and maintenance cost.

For example, a new type of alumina-silicate-based ozone catalyst incorporates various transition-metal oxides (including precious metals) as active components, using multi-stage precisely temperature-controlled sintering combined with a unique pore-forming process. The final product offers high strength, high specific surface area, high catalytic activity, acid-alkali corrosion resistance, and easy recovery, performing excellently in stability, selectivity, and environmental friendliness.

SINOKLE series ozone catalysts

The fusion innovation of the technology is embodied in theCDOF(Cyclonic Dissolved Ozone Flotation) integrated ozone-advanced-oxidation flotation unit. This unit creatively combines advanced ozone oxidation, cyclonic, and dissolved-air flotation technologies and integrates SINOKLE's self-developed heterogeneous ozone catalyst:

Micro-nano oxygen bubbles clean and agitate the catalyst, strengthening contact reactions, improving ozone utilization and effectiveness, while preventing catalyst compaction and clogging.

The micro-bubbles simultaneously remove suspended solids, colloids, and oils from wastewater, reduce non-dissolved COD, further decrease ozone consumption, and achieve highly efficient comprehensive purification of refractory wastewater.

Advanced ozone oxidation technology applied to an oilfield wastewater treatment project

As global environmental and water-quality safety standards become increasingly stringent, especially in drinking-water purification, industrial wastewater treatment, and advanced municipal effluent treatment, ozone advanced oxidation technology integrated with high-efficiency heterogeneous catalysts demonstrates tremendous application potential and market prospects.