CDFU: Revolutionizing Emulsified Oil-Water Separation
In the field of industrial oily wastewater treatment, the efficient separation of emulsified oil has always been a technical challenge. Although traditional dissolved air flotation (DAF) technology is widely used, it faces limitations such as long retention times, large footprint, the need for chemical additives, and secondary pollution. The emergence of cyclonic dissolved gas flotation (CDFU) technology is driving a technological revolution in emulsified oil separation, offering an efficient, compact, and green solution as an innovative alternative to traditional DAF.
Technical Limitations of Traditional DAF
Traditional DAF technology relies on dissolved air to release large quantities of micro-bubbles that adhere to oil droplets for separation, but it has significant drawbacks:
Low Efficiency: Requires a retention time of 15-40 minutes, with single-stage oil removal efficiency typically only 60%-85%.
Large Footprint: Utilizes an open design dependent on large concrete tanks.
Secondary Pollution: Requires the addition of chemicals for demulsification, generating oily sludge (hazardous waste), which increases treatment difficulty and cost.
Poor Stability: Weak adaptability to fluctuations in influent quality and vulnerable to shock loads.
Traditional DAF
Revolutionary Breakthrough of CDFU Technology
CDFU technology achieves a leap in technical performance through the ingenious integration of cyclonic separation, ultra-fine bubble generation, and dissolved air flotation:
High-Efficiency Separation Mechanism: CDFU utilizes the strong centrifugal force generated by the cyclonic flow to pre-separate heavy suspended solids. Subsequently, micro-bubbles with a diameter of only 5-30μm (compared to 5-100μm for traditional DAF bubbles) efficiently adhere to and break down emulsions. Its single-stage oil removal efficiency exceeds 90%, suspended solids removal rate exceeds 85%, and the oil content in the effluent can be consistently maintained below 10 mg/L.
Extremely Short Retention Time: With its highly optimized flow process, CDFU requires a hydraulic retention time of only 1-5 minutes, making it 3-8 times more efficient than traditional DAF and significantly increasing processing capacity.
Purely Physical Process, Green and Eco-friendly: This technology achieves oil-water separation through purely physical demulsification without the need for any chemical additives. It prevents the generation of oily sludge at the source, effectively solving the problem of secondary pollution.
Compact and Intelligent Design: CDFU adopts a fully enclosed, skid-mounted design, occupying only one-third of the footprint of traditional DAF systems. It is particularly suitable for plants with space constraints or offshore platforms. Integrated with IoT and AI technologies, it supports remote monitoring and unattended operation, significantly reducing labor costs.
The Cyclonic Dissolved Gas Flotation (CDFU) technology successfully addresses the pain points of traditional DAF in treating emulsified oils through its high-efficiency separation, rapid response, eco-friendliness, and compact intelligent design, marking a significant innovation in oily wastewater treatment technology. With increasingly stringent environmental regulations and rising land costs, CDFU technology is poised to become the preferred solution in sectors such as petrochemicals and oilfield extraction, driving industrial wastewater treatment toward greater efficiency and sustainability.
