Solving the Oily Wastewater Challenge: How CDFU Reshapes the New Paradigm of Oilfield Water Treatment
In industrial fields such as oil extraction, refining and petrochemicals, and machinery manufacturing, the treatment of oily wastewater has always been a core challenge for environmental protection and sustainable development. If such wastewater - complex in composition and severely emulsified - is not treated properly, it will cause far-reaching harm to water bodies, soil, and ecosystems.
Traditional treatment processes such as gravity settling, chemical demulsification, and conventional flotation generally face many bottlenecks: low efficiency, a large footprint, high operating costs, and the tendency to produce chemical sludge and secondary pollution. The market urgently needs a more efficient, intensive, and green innovative solution.
Against this backdrop, the CDFU (Compact Swirl Dissolved Air Flotation unit) independently developed by Shenzhen SINOKLE Technology Co., Ltd. came into being. This technology deeply integrates the principles of centrifugal separation, dissolved air flotation, and ultra-fine bubble generation, providing a disruptive SINOKLE solution for difficult industrial oily wastewater treatment.
1. Technical Core: Synergistic Enhanced Separation of Swirl Centrifugation and Micro-Bubbles
CDFU technology's outstanding performance stems from its original swirl field enhanced micro-bubble flotation mechanism.
Swirl centrifugal pre-concentration: Wastewater enters the unit tangentially under a specific pressure, forming a high-intensity swirl centrifugal force field. Within this field, oil droplets and suspended solids are rapidly thrown toward the cylinder wall, achieving preliminary enrichment and collision coalescence, which greatly improves the capture probability of the subsequent flotation unit.
Precise capture by micro-bubbles: Through patented technology, the system generates large numbers of dispersed micro- and nano-scale bubbles. These bubbles feature a large specific surface area, slow rise velocity, and high interfacial activity, and can efficiently adsorb and envelop the already-coalesced oil droplets and particles.
Efficient separation and discharge: Under the combined action of swirl and buoyancy, the bubble-oil droplet complexes quickly float to the oil collection zone and are continuously discharged through an automatic control system. The purified water flows out from the bottom, clear and transparent.
The entire physical separation process is completed in a sealed, pressurized environment, with a residence time of only 1-5 minutes and a treatment efficiency 5-8 times higher than traditional flotation.
2. Core Advantages: Defining New Dimensions of Efficient Water Treatment
Compared with traditional technologies, CDFU demonstrates all-round leading advantages:
Efficient and stable with reliable effluent: single-stage de-oiling efficiency **>90%**, stably removing oil droplets and suspended solids of 2 um or more; effluent oil and suspended solids contents can be reduced to **10 mg/L or less** respectively, meeting stringent reuse or discharge standards.
Compact and intensive with flexible deployment: Using a standardized skid-mounted design, the footprint is only about 10% of that of traditional dissolved air flotation. The equipment is highly modular and easy to transport, enabling rapid installation and startup, and is especially suitable for land-constrained plant retrofits, offshore platforms, and distributed treatment scenarios.
Green and low-carbon with economical operation: The entire process is pure-physical separation requiring no chemical flocculants, avoiding oily sludge (hazardous waste) generation at the source, and the recovered oil is of high purity. The system has few rotating devices and low energy consumption, and automated operation greatly reduces labor and maintenance costs.
Intelligent, reliable, and highly adaptable: Fully enclosed automatic control supports remote monitoring and unattended operation with inherent safety. The process has extremely strong tolerance (robustness) to fluctuations in influent water quality and quantity, ensuring long-term continuous stable operation.
3. Wide Application: A Proven Full-Scenario Solution
CDFU technology has been successfully applied to many benchmark projects at home and abroad, and its outstanding performance has withstood the test of complex operating conditions:
Produced water treatment project at an oilfield in Africa
Treatment capacity reached 5,000 m3/day. Operating data show that the effluent oil content remains stable at 10mg/L or less, far better than industry standards. The equipment runs stably and maintenance costs are significantly reduced.
Produced water treatment at an oilfield in Xinjiang, China
using CDFU as the core process to treat oilfield produced water. Facing high-concentration influent, the system demonstrated strong shock resistance and stability, with excellent effluent quality, providing reliable assurance for the oilfield's sustainable production.
4. A Technical Benchmark Driving a Sustainable Future
Against the macro backdrop of promoting green and low-carbon development and the dual carbon goals, clean production in the oil industry has become an inevitable choice.
The significance of SINOKLE's CDFU swirl dissolved air flotation technology lies not only in providing a highly efficient wastewater treatment device. Through its pure-physical, zero-chemical, high-efficiency, and low-energy technological path, it substantively drives the transformation of oilfield production from end-of-pipe treatment to in-process cleanliness.
This technology helps oilfield enterprises meet environmental requirements more economically and more thoroughly and, through resource recovery (recovering waste oil) and operating cost savings, turns environmental investment into tangible benefits, providing a proven new green path for the sustainable, high-quality development of oilfields.
