Technology introduction
CDOF(Cyclonic Dissolved Ozone Flotation unit)is a patented technology independently developed by our company. It creatively combines multiple catalytic oxidation technology of ozone, cyclonic technology, dissolved gas flotation technology and other technologies. It has achieved high efficient and comprehensive oxidation and removal of various pollutants in all kinds of refractory wastewater, with international advanced technology level.
process flow diagram
·Multiple Catalytic Oxidation of ozone (Homogeneous and Heterogeneous Catalysis)
·Hydrocyclone technology
·Dissolved air floatation technology
·Fully closed automatic belt pressure oxidation technology
·Supercritical catalytic oxidation and efficient heterogeneous catalysts
·cavitation
·High efficiency flocculation
·Patent product
Application: petroleum refining, electric power, metallurgy, medicine, printing and dyeing, municipal, landfill leachate, river sewage treatment, etc
Technical Principles
Under the action of the highly efficient heterogeneous catalyst developed by our company, ozone is efficiently transformed into hydroxyl (·OH) with strong oxidation, and the ring opening and chain breaking of refractory organic pollutants are realized to form easily treatable small molecular organic matter, and finally CO2 and H2O are generated.
The REDOX potential of hydroxyl radical (·OH) is 2.8V, and its oxidation performance is very high. It can directly interact with various organic pollutants through electron transfer, electrophilic addition, dehydrogenation reaction and other ways, so that it can be finally degraded into CO2, H2O and other harmless substances. It is an efficient method to degrade organic pollution in wastewater.
Highly efficient heterogeneous catalyst
Our company's research and development of a variety of active metal oxides (including precious metals), high porosity micropore molding technology, hydrophilic modification anti-pollution, anti-clogging technology as one of the efficient heterogeneous catalyst.
| The compressive strength（Mpa） | ≥1 |
| pore volume（ml/g） | ≥0.3 |
| Specific surface area（㎡/g） | ＞250 |
| apparent density（t/m³） | 0.7 |
| diameter（mm） | 2-4 |
| abrasion（%） | ≤0.3 |
| appearance | Gray black sphere |
| Service life (years) | ＞5 |
Technical advantages
1.Limit covers an area of
Domestic original creation, set a variety of technologies as one, with a number of international patents and invention patents
The effective reaction time is not more than 15 minutes, the treatment efficiency is high, the reaction speed is fast
The system has good adaptability, strong impact resistance, stability and reliability
2.Technical and economic
High ozone utilization rate, low energy consumption, no secondary pollution, low operation and maintenance cost
Supporting equipment and infrastructure investment is less, the comprehensive investment is low
High degree of automation, convenient operation, less labor
3.Limit covers an area of
Short process flow, short residence time, very small footprint (only 1/5 of the traditional)
Skid - mounted design, compact structure, small footprint
4.Safety and environmental protection
Fully closed with pressure operation, zero leakage, automatic operation, safe and reliable
Do not produce concentrated liquid, environmentally friendly, green environmental protection
Remote monitoring, unattended, safe and environmental protection
Sewage treatment plant treatment technology
After biochemical degradation treatment, most of the remaining organic pollutants in the water are soluble and refractory organic pollutants. Our CDFU+HIBR+CDOF technology is adopted to efficiently oxidize organic pollutants, reduce COD index and decolorization, and has the function of sterilization and disinfection without secondary pollution. The effluent index meets the Grade A standard of "Pollutant Discharge Standard of Urban Sewage Treatment Plant" (GB18918-2002).
Related patent Certificate
Compared with the traditional membrane + evaporation treatment technology:
| NO. | items | Membrane + evaporation technology | CDOF+ Biochemical technology |
| 1 | application | Landfill leachate MBR effluent is advanced to the level of comprehensive effusion or higher | |
| 2 | principle | Sewage: nanofiltration +DTRO+RO+ resin exchange | CDOF+ Biochemical (A/O or MBR) |
| Concentrated water: precipitation + resin exchange +MVR/ multieffect evaporation | |||
| 3 | technical level | Conventional technology | PCT international patents, a number of invention patents |
| 4 | The stability of | The film and evaporation are easy to scale, need regular cleaning, long-term stability is not good | No need for complex cleaning, automatic control, good stability |
| 5 | Cost per ton of water treatment | P 60 yuan/ton | 15 yuan/ton or less |
| 6 | Investment and Maintenance | Equipment investment is high, maintenance is complex and costly | The investment is only 2/3 of membrane + evaporation, and the maintenance cost is extremely low |
| 7 | Decolorizing effect | poor | The decolorization effect is complete |
| 8 | Deodorization effect | No deodorization effect | Efficient and fast deodorizer |
| 9 | Ease of operation | The equipment has complex technology, high requirements, complex operation, inconvenient operation and high cost | Simple process, automatic control, simple operation, convenient operation and maintenance, low cost |
| 10 | Putting-in-service proactively cycle | Long construction and commissioning cycle (more infrastructure, complex technology) | Short construction and commissioning (skid mounted design, simple process) |
Figure 1: Field equipment; Figure 2: Water inlet and water outlet
