Advanced Catalytic Ozone Oxidation Process Selection: The CDOF Unit's Outstanding Shock-Load Resistance
Advanced catalytic ozone oxidation process: the upgrade direction for wastewater treatment technology
As a strong oxidant with a redox potential of 2.07 V, ozone reacts with organics bearing unsaturated functional groups in wastewater, reducing pollutant toxicity and improving biodegradability. Its core advantages are:
simple flow, short treatment time, no residue generated, essentially no secondary pollution — making it an important technical pathway in wastewater treatment. However, conventional single ozone oxidation technology has obvious limitations: its oxidation capacity is limited and selective, preferentially reacting with fast-reacting pollutants and struggling to remove refractory substances and small-molecule organic acids; its ozone utilization rate is low and system energy consumption high, constraining large-scale application of the technology.
Advanced catalytic ozone oxidation technology: principle and core value
Ozone catalytic oxidation technology uses the synergistic action of catalysts to break through the bottlenecks of conventional technology — a new technical scheme for advanced water treatment. Its core principles include three dimensions:
The catalyst lowers the reaction activation energy and changes the reaction pathway, promoting ozone decomposition into hydroxyl radicals with a higher redox potential, achieving thorough degradation of organic pollutants;
The catalyst forms complexation reactions with organic pollutants, enhancing their oxidizability;
Through the catalyst's enrichment of ozone and organics, the oxidative decomposition rate is accelerated, ultimately achieving the core goals of "enhanced ozone oxidation performance and higher ozone utilization" and realizing deep purification of refractory wastewater.
Figure 2. Ozone catalyst
CDOF patented technology: integrated innovation in advanced catalytic ozone oxidation
CDOF (Cyclonic Dissolved Ozone Flotation unit) is a pioneering patented technology in China and internationally leading. It innovatively integrates three core technologies — multi-stage catalytic ozone oxidation, hydrodynamic cavitation and cyclonic flotation — into a high-efficiency oxidation-flotation integrated unit that simultaneously removes oil, suspended solids, colloids, COD, bacteria and many other pollutants from wastewater, thoroughly solving complex wastewater treatment challenges.
The unit consists of an oxygen supply system, an ozone generation system, a high-efficiency ozone injection system, a multi-stage catalytic reaction system and a cyclonic dissolved-air flotation system, with notable technical advantages:
Short flow, compact equipment, small footprint;
Fewer electrical devices and low power consumption, with controllable operating costs;
Convenient operation with full automatic control support, lowering on-site operation and maintenance requirements;
Strong adaptability, resistant to water volume and quality shock loads, flexibly handling changing operating conditions;
Can work synergistically with biochemical and other technologies to further improve overall treatment results.
Application case
In a landfill leachate treatment plant project, the CDOF technology demonstrated outstanding real-world performance: the project has a treatment capacity of 300 m³/d with ozone production of 8 kg/h; for high-strength leachate with MBR effluent COD ≤1300 mg/L, after treatment by the CDOF unit, the effluent COD was ≤400 mg/L with chromaticity ≤30 and no odor; after subsequent biochemical treatment, the final effluent reached COD ≤20 mg/L, ammonia nitrogen ≤1 mg/L and total phosphorus ≤0.2 mg/L, meeting the surface water Class III standard.
In this case, the CDOF unit operates fully enclosed under pressure, achieving zero ozone leakage, with a site-friendly environment and no safety hazards; the equipment does not foul easily and is equipped with an automatic cleaning function, further ensuring long-term stable operation — providing an efficient, environmentally friendly and reliable solution for high-difficulty landfill leachate treatment.
