Ozone Oxidation Technology

With the increasing complexity of industrial wastewater composition, especially the surge in demand for the treatment of recalcitrant organic pollutants (such as dyes in dyeing and printing wastewater and persistent pollutants in chemical wastewater), advanced oxidation technologies have gained significant attention due to their powerful pollutant degradation capabilities. Among these, ozone catalytic oxidation technology, with its advantages of high efficiency, cleanliness, and no secondary pollution, has become one of the core technologies in the field of advanced industrial wastewater treatment.

Ozone oxidation: refers to the process of using ozone (O₃) as a strong oxidant to directly or indirectly oxidize and decompose organic pollutants in water.

Ozone catalytic oxidation: is an advanced form of ozone oxidation. It significantly accelerates ozone decomposition by introducing a solid catalyst into the reaction system, generating more potent free radicals (mainly •OH hydroxyl radicals), thereby achieving faster and more thorough mineralization of pollutants (i.e., ultimately converting them into CO₂ and H₂O).

Core Principle

Direct Oxidation: Ozone molecules directly react selectively with certain organic compounds with specific structures (such as compounds containing double bonds or active aromatic rings). This pathway is relatively slow and selective.

Indirect oxidation (the core of catalytic oxidation): On the catalyst surface, ozone is efficiently catalytically decomposed, generating highly reactive hydroxyl radicals (•OH). •OH attacks the vast majority of organic matter with almost no selectivity, completely degrading it. The introduction of a catalyst greatly enhances the indirect oxidation pathway and is key to the technology's high efficiency.

Key Parameters

COD/CODCr (Chemical Oxygen Demand) Removal Rate: This is the most crucial engineering indicator. COD reflects the total amount of organic matter in water. COD (permanganate index) is suitable for lightly polluted water samples. CODCr (dichromate method) is suitable for high-concentration, complex industrial wastewater and is the mainstream indicator for measuring the effectiveness of advanced treatment. The system goal is usually to reduce COD/CRr from high concentrations (e.g., 80-200 mg/L) to emission standards (e.g., below 50 mg/L).

Main Application Areas

Upgrading effluent from industrial park wastewater treatment plants: Ensuring stable compliance with Class A or stricter standards.

Coal chemical and petrochemical wastewater: Treating characteristic pollutants such as phenols, cyanides, and heterocyclic compounds.

Pharmaceutical and pesticide wastewater: Degrades highly toxic and recalcitrant substances such as antibiotics and pharmaceutical intermediates.

Dyeing and textile wastewater: Decolorizes and degrades macromolecular dyes and auxiliaries.

Landfill leachate advanced treatment: Serves as the final treatment method for nanofiltration/reverse osmosis concentrate.

The core role of honeycomb ceramics in ozone catalytic oxidation

As the optimal catalyst carrier: Honeycomb ceramics possess a regular porous structure, providing a large loading area and stable adhesion surface for active catalytic components (such as manganese, copper, iron oxides, or precious metals), effectively preventing the loss of active ingredients and ensuring full exposure of catalytic sites.

As a highly efficient three-phase mass transfer reactor: Ozone catalytic oxidation involves a gas-liquid-solid three-phase reaction, and mass transfer efficiency is a key limiting factor. The parallel channels of honeycomb ceramics can divide the gas and liquid flows into small units, efficiently dispersing ozone bubbles by enhancing turbulence and shearing, maximizing the contact area and reaction time with the catalyst and pollutants, thereby significantly improving mass transfer and reaction efficiency.

As the structural cornerstone of the system: The regular pore structure of honeycomb ceramics significantly reduces system resistance and energy consumption; its material possesses high mechanical strength and corrosion resistance, enabling long-term tolerance to complex water qualities; its integrated modular design offers excellent anti-clogging performance, long lifespan, and supports rapid overall replacement, simplifying maintenance.

Summary

In modern ozone catalytic oxidation systems, honeycomb ceramics have been upgraded to a key functional module. Selecting a honeycomb ceramic catalyst with optimized pore structure, high coating activity, and stable material directly determines the system's treatment efficiency, operating energy consumption, and long-term stability.

We are a Chinese honeycomb ceramic manufacturer, providing not only honeycomb ceramics for traditional exhaust gas purification but also honeycomb ceramic catalyst supports for ozone catalytic oxidation, VOCs catalytic combustion, and other applications. For more information, please contact us via email at annayu@169chem.net or WhatsApp at +8618909016373.