Advanced Ozone Catalytic Oxidation Technology for Efficient Wastewater Treatment

Ozone (O₃) is a powerful oxidant and disinfectant, with the added benefits of decolorization and deodorization. It plays an important role in wastewater treatment. The commonly used ozone oxidation technology systems in plants mainly include the following types:

1. Single Ozone Oxidation Technology

The reaction between ozone and pollutants in water occurs through two main mechanisms: direct oxidation and indirect oxidation.

· Direct Oxidation depends on the ozone molecule itself, and its interaction with pollutants is selective. This process mainly decomposes large organic molecules into smaller fragments, significantly improving the biodegradability of wastewater. However, it has a relatively limited effect on the overall reduction of total organic carbon in the water.

· Indirect Oxidation involves the decomposition of ozone to produce highly reactive hydroxyl free radicals (·OH), which then react with organic substances. Hydroxyl radicals are considered ideal oxidants in advanced oxidation processes. Their oxidation process is non-selective and can quickly and even thoroughly mineralize a wide range of hard-to-degrade organic substances, effectively reducing the organic carbon content in the water.

2. Combined Ozone Processes

Due to the limitations of single ozone oxidation technology (e.g., difficulty in completely degrading some stubborn organic substances or achieving full mineralization), several combined processes using ozone alongside other technologies have been developed. These processes synergize the strong oxidative capabilities of ozone with the advantages of other techniques, improving overall treatment efficiency. 

· Ozone-Bioactive Carbon Technology: Ozone pre-oxidation breaks down complex organics into small, biodegradable molecules and increases dissolved oxygen. The subsequent bioactive carbon unit adsorbs and biodegrades these organic substances.

· Ozone-Coagulation Technology: Ozone destroys hydrophilic substances, converting them into hydrophobic substances, significantly improving the coagulation and sedimentation process.

· Ozone-Activated Carbon Adsorption Technology: Ozone breaks down macromolecules, reducing their size, making them easier to adsorb by activated carbon, thus enhancing adsorption capacity.

· Ozone-Activated Sludge Technology: This process aims to improve the biodegradability of wastewater, creating favorable conditions for biological treatment.

· Ozone-Membrane Treatment Technology: Ozone is commonly used in the post-treatment stage of ultrafiltration membranes to optimize effluent water quality.

· Ozone-Ultrasonic Treatment Technology: The synergistic effect of ultrasonic cavitation and ozone oxidation improves the removal efficiency of complex organics.

In addition, various combined processes, such as ozone/peroxide oxidation, ultraviolet-catalyzed ozone oxidation, and ozone-aerobic biological filtration combinations, are also utilized.

3. Catalytic Ozone Oxidation Technology

This technology introduces catalysts into the ozone oxidation system to enhance the reaction rate and treatment efficiency. Common catalysts include metals and their oxides, and activated carbon. Catalytic ozone oxidation can be categorized as:

· Photocatalytic Ozone Oxidation: Utilizes ultraviolet light as a catalytic energy source to enhance ozone decomposition and oxidation capacity.

· Homogeneous Catalytic Ozone Oxidation and Heterogeneous Catalytic Ozone Oxidation: The main difference lies in the form and load method of the catalysts, and these are important areas of research.

The ozone oxidation technology system provides a diversified solution for deep treatment in wastewater treatment plants, and its selection must be optimized based on specific water quality characteristics and treatment goals.

SINOKLE's Innovative Ozone Catalytic Oxidation Technology for Advanced Wastewater Treatment

Based on an in-depth understanding of ozone oxidation technology principles, Shenzhen Clear Science & Technology Co., Ltd (SINOKLE) has introduced an innovative wastewater treatment process using an integrated CDOF (ozone advanced oxidation flotation) and CDFU (cyclonic dissolved gas flotation) unit, marking a key step towards a more efficient and intensive direction in catalytic ozone oxidation technology. 

Core Advantages of the Process:

· Exceptional Treatment Efficiency: The system achieves a high chemical oxygen demand (COD) reduction rate, removes organic matter deeply, and has excellent decolorization capability, ensuring clear and transparent effluent.

· Significant Economic Benefits: Through technological optimization, the ozone dosing ratio is greatly reduced, only 1/2 to 1/4 of the traditional methods, greatly reducing ozone consumption and system energy costs while maintaining effectiveness.

· Efficient Footprint and Reaction: The CDOF multi-catalytic oxidation technology accelerates reaction speed, shortening wastewater retention time to under 15 minutes. The modularized skid design reduces land occupation to just 1/5 of traditional processes, making it ideal for space-constrained or rapid-deployment projects.

· Stable Operation and Easy Maintenance: As core patented technologies, the CDFU and CDOF units offer stable and reliable performance, with designs that prioritize operational convenience and simple maintenance, effectively reducing lifecycle operation and maintenance costs.

· Comprehensive Safety Assurance: The system operates under fully automated closed-pressure mode, completely eliminating the risk of ozone leakage and ensuring operational safety and environmental friendliness.

· Strong Shock Resistance: The process design offers strong load resistance, capable of handling fluctuations in feedwater quality and ensuring consistent and stable effluent quality.

SINOKLE's new-generation ozone catalytic oxidation advanced treatment process integrates high efficiency, energy savings, compactness, safety, and stability, providing a highly competitive solution for municipal and industrial wastewater treatment plant upgrades and deep treatment needs, with broad application prospects.