Solving Oily Wastewater Challenges: CDFU Flotation Achieves Zero-Chemical Oil-Water Separation
In traditional industries such as petrochemicals, oilfield exploitation, and power generation, the treatment of oily wastewater has long been trapped in a dilemma where environmental compliance and economic benefit are hard to reconcile. Enterprises are often forced to trade off between high chemical costs, hazardous-waste disposal expenses, and potential environmental-violation risks. As resource value becomes prominent and environmental regulations tighten, recovering and recycling valuable resources from wastewater has become a core issue in driving the industry's green and low-carbon transformation.
As a leader in environmental-treatment technology and equipment, SINOKLE provides an innovative solution with its independently developed CDFU cyclonic dissolved gas flotation technology. This first-of-its-kind, compact, sealed, and pressurized flotation technology abandons the traditional "treat-pollution-with-chemicals" path. Through the purely physical deep integration of a cyclonic centrifugal field and micro-bubble dissolved air flotation, it not only achieves highly efficient water purification but also opens a new economic path of turning "waste" into "resources".
I. Technological Innovation: Purely Physical Demulsification
Traditional chemical flotation relies heavily on flocculants and demulsifiers. While separating oil and water, it brings two drawbacks: first, the separated waste oil is degraded in quality and has high water content due to chemical admixture, making direct reuse difficult; second, it generates large amounts of oily chemical sludge classified as hazardous waste, with high disposal costs and environmental risks.
SINOKLE's CDFU technology fundamentally changes this model. It adopts a high-efficiency dissolved-air release system that produces ultra-fine bubbles concentrated at 5–30 µm (D50 ≤ 25 µm). In the patented cyclonic field, these bubbles achieve high-speed collision and adhesion with centrifugally pre-enriched oil droplets, completing efficient physical demulsification and separation with no chemical addition at all.
This delivers two core values:
High-quality resource recovery: physical separation ensures the purity of recovered oil, with water content stably controlled at a low level (below 10% depending on conditions). Such high-quality waste oil can be directly re-refined or used as feedstock, greatly enhancing resource value.
Eliminating hazardous waste at the source: it completely prevents the generation of oily chemical sludge, saving thousands of yuan per ton in disposal costs and fundamentally avoiding related storage, transport, and compliance risks.
II. Benefit Restructuring: From Cost Center to Value Creation
Adopting CDFU means oily wastewater treatment shifts from a pure environmental cost to a value-creating segment with significant economic benefits.
Direct resource revenue: in scenarios such as electric-desalting draw-off water and oilfield produced water, CDFU, with its single-stage oil-removal efficiency > 90%, efficiently recovers large amounts of crude oil. Taking a CNPC petrochemical company's electric-desalting wastewater project as an example, the "coalescing oil remover + CDFU" purely physical process achieved considerable high-quality waste-oil recovery and direct economic benefits.
Minimal operating cost: the CDFU system's hydraulic retention time is as short as 1–3 minutes, gas consumption only 2%–3% of treated water, and energy use far below traditional flotation. Its compact skid design reduces footprint to one-third of conventional DAF, greatly lowering capital and operating costs.
Low maintenance cost: the equipment is mainly static, with no vulnerable parts such as mechanical scrapers, fully automatic enclosed operation, and strong shock resistance, which extends maintenance intervals and reduces labor and maintenance costs.
III. Proven in Practice: Global Projects Endorse Reliability
The excellent performance of SINOKLE's CDFU technology has been successfully validated in multiple demanding industrial projects in China and worldwide — from CNPC Sichuan Petrochemical and Sinopec Cangzhou Petrochemical to overseas projects such as the Sierra Leone heavy-oil power plant — consistently helping customers achieve stable compliance and converting environmental investment into tangible resource returns.
Conclusion
As the "dual-carbon" strategy and circular-economy model advance, technological innovation is the key to resolving the contradiction between environment and benefit. SINOKLE's CDFU cyclonic dissolved gas flotation technology not only provides a highly efficient and reliable oily-wastewater treatment device but also represents a sustainable water-governance paradigm of "resource recovery, low carbon, and value creation". It helps enterprises transform former environmental pressure points into value-growth points, truly realizing the high unity of economic benefit and environmental responsibility.
