Advanced Solutions for Oil Refining Wastewater Treatment: SINOKLE's Innovative CDFU and CDOF Technologies

1. Industry Background

With the rapid development of integrated oil refining and petrochemical projects in China, wastewater treatment has become a key bottleneck in the industry's green development. According to statistics, domestic refining enterprises produce more than 1 billion tons of wastewater annually, which contains large amounts of oil-based pollutants, emulsified oil, suspended solids, and other harmful substances. In 2026, the government will tighten wastewater discharge standards further, posing greater challenges to traditional treatment technologies. Therefore, oil refining companies urgently need new, efficient, energy-saving, and environmentally friendly wastewater treatment solutions.

2. Challenges in Wastewater Treatment

Oil refining wastewater treatment faces several technical challenges:

· High Emulsification: The oil droplets in wastewater generated during the refining process are fine and emulsified, making it difficult for traditional separation technologies to remove them effectively.

· Complex Composition: The wastewater contains large amounts of non-degradable organic substances, benzene compounds, phenols, and other toxic pollutants.

· Water Quality Fluctuations: Variations in production conditions cause significant fluctuations in wastewater volume and quality, making the treatment process highly sensitive to these changes.

· Strict Discharge Standards: With increasingly stringent environmental requirements, conventional treatment processes struggle to consistently meet the discharge standards.

3. Disadvantages of Traditional Treatment Technologies

Traditional wastewater treatment technologies have significant shortcomings:

· Dissolved Air Flotation (DAF): Large bubble size results in poor emulsified oil removal efficiency; the equipment is bulky and requires a large footprint.

· Chemical Demulsification: Requires a large amount of chemicals, leading to high operating costs and potential secondary pollution.

· Biological Treatment: Demands high-quality influent, has a long startup period, and is sensitive to water quality fluctuations.

· Membrane Separation: Severe membrane fouling, high maintenance costs, and poor operational stability.

4. Introduction of SINOKLE's New Technology

Shenzhen Clear Science & Technology Co., Ltd. (SINOKLE) has developed the CDFU (Cyclonic Dissolved-gas Flotation) and CDOF (Cyclonic Dissolved Ozone Flotation) technologies, providing an innovative solution for oil refining wastewater treatment.

1. CDFU Cyclonic Dissolved-gas Flotation 

· Core Technology: A combination of cyclonic separation, micro-nano bubbles, and dissolved gas flotation.

· Working Principle: The produced water enters the device via a lift pump and forms a stable flow field under cyclonic action. The oil and suspended solids rapidly float to the surface under the action of micro-nano bubbles and are automatically discharged through level control. The treated water is discharged from the bottom outlet.

2. CDOF Cyclonic Dissolved Ozone Flotation 

· Core Technology: Organic combination of ozone catalytic oxidation and flotation technology.

· Application: Deep wastewater treatment, degradation of hard-to-degrade organic substances, decolorization, deodorization, and disinfection.

5. Features and Advantages of New Technology

Core Technology Advantages:

· Pure physical separation process with no chemical additives, no secondary pollution.

· Micro-nano bubbles, higher collision probability with oil droplets.

· Strong centrifugal force generated by the cyclonic flow field, leading to high separation efficiency.

· Compact structure, small footprint.

· Modular design, flexible combination based on treatment capacity.

· Automatic control, easy operation and maintenance.

6. Application Cases

Case 1: Petrochemical Wastewater Treatment Project

· Treatment Capacity: 2,000 m³/d

· Influent Quality: Oil content 500-2,000 mg/L, heavily emulsified

· Treatment Effect: Effluent oil content < 10 mg/L, suspended solids < 20 mg/L, stable compliance with standards.

Case 2: Oilfield Produced Water Treatment Project

· Treatment Capacity: 5,000 m³/d

· Technology Solution: CDFU + Filtration Combination

· Treatment Effect: Effluent meets reuse standards, enabling resource recovery of produced water.

7. Conclusion

With increasingly stringent environmental requirements and the ongoing pursuit of carbon neutrality, oil refining enterprises face unprecedented challenges in wastewater treatment. SINOKLE, driven by technological innovation, offers reliable solutions for the industry with its Cyclonic Dissolved-gas Flotation and Cyclonic Dissolved Ozone Flotation technologies, which offer high efficiency, energy savings, and environmental protection. These technologies provide reliable and sustainable solutions for oil refining wastewater treatment.