CDFU + KFM Oily Wastewater Treatment Process: Highly Efficient Purification, Leading the Future Intelligently
In fields such as oil and gas chemicals and oilfield exploitation, oily wastewater treatment has always been a key and difficult point of environmental governance. SINOKLE, with deep expertise in industrial wastewater treatment technology, leverages its self-developed CDFU cyclonic dissolved-air flotation technology and KFM active-filter-media filtration technology to build a highly efficient, stable, and environmentally friendly integrated oily wastewater treatment process, providing an innovative solution to this industry challenge.
I. Process Overview: Two-Stage Purification, Layer-by-Layer Control
SINOKLE's oily wastewater treatment process adopts a combined flow of 'two-stage CDFUcyclonic dissolved-air flotation + KFM active-filter-media filtration', achieving graded and highly efficient removal of pollutants from the collection-tank influent to final reuse or downstream process.
Wastewater first enters the first-stage CDFU device, completing the separation of most floating oil, dispersed oil, and suspended solids; it then enters the second-stage CDFUdevice, further removing emulsified oil and fine impurities; finally, it passes through the KFM active-filter-media filter for deep purification, ensuring the effluent quality meets the requirements for reuse or subsequent processes. The waste oil generated during the process is uniformly collected and treated, and the tail gas is connected to a dedicated system, achieving full-process environmental control.
II. Core Technical Highlights
1. CDFU Cyclonic Dissolved-Air Flotation: A 'Sharp Tool' for Efficient Demulsification and Oil Removal
CDFUCyclonic dissolved-air flotation (CDFU) technology is SINOKLE's patented core, which creatively couples cyclonic centrifugal separation, ultrafine nano-bubble generation, and dissolved-air flotation technology in depth. After the wastewater enters the device tangentially, a high-speed cyclonic field is formed; under centrifugal force, heavy particles are pre-separated and oil droplets are enriched; at the same time, the system releases a large number of ultramicrobubbles of 5-30 microns, which have a large specific surface area and strong adsorption capacity, and can efficiently collide with and adhere to emulsified oil droplets, forming 'bubble-pollutant' composites that rapidly float up to the central oil-collection zone and are continuously scraped off. Compared with traditional flotation, the CDFUdevice requires no chemical dosing, achieves a single-stage oil-removal rate of over 90%, occupies only 1/3 of the footprint of traditional processes, and its skid-mounted design allows rapid deployment, adapting to various space-sensitive projects. The two-stage CDFUsynergy can effectively remove over 99% of floating oil, dispersed oil, and most emulsified oil from the wastewater, laying a solid foundation for subsequent deep treatment.
2. KFM Active Filter Media Filter: The 'Precision Gatekeeper' of Deep Purification
As the last line of defense of the process, the KFM active-filter-media filter uses silicon-based active filter media modified by atomic-deposition technology, achieving dual purification of physical interception and charge adsorption. The filter-media surface is treated with super-hydrophilic modification to form a nano-scale pore structure with a specific surface area 300 times that of quartz sand; the filtration precision can reach 1 micron, and the interception efficiency for suspended solids is greater than 95%. The filter-media surface carries a permanent negative charge, which can capture charged colloids, fine oil droplets, and some dissolved pollutants in the water through charge adsorption, effectively solving the pain points of traditional filtration equipment such as easy clogging and short service life. The KFM filter media has a wear rate of only 0.07 per mille and a breakage rate of 0.08%, with a theoretical service life of up to 15 years, far superior to traditional filter media such as anthracite and corundum, greatly reducing operation-and-maintenance costs and equipment-replacement frequency.
III. Process Advantages: Efficient, Environmentally Friendly, Economical
Excellent treatment effect: The combined process of two-stage CDFU+KFM can reduce the oil content in oily wastewater to below 5 mg/L and the suspended-solids content to below 1 mg/L, meeting stringent water-quality standards such as oilfield reinjection water and industrial reuse.
Full-process environmental controllability: The process uses nitrogen protection throughout, effectively preventing the escape of volatile organic compounds (VOCs), with the tail gas uniformly collected and treated and the waste oil centrally recovered, achieving zero pollutant discharge.
Low operating cost: No chemical agents such as demulsifiers or flocculants need to be dosed, greatly reducing chemical consumption; the equipment has a high degree of integration and automated operation, with low labor costs; and the long-life filter-media design reduces consumable-replacement expenses.
Wide range of application scenarios: Adaptable to various complex water qualities such as oilfield produced water, refining wastewater, tank-farm cut water, and power-plant oily wastewater; the modular design can be flexibly combined according to project needs to meet different treatment-scale requirements.
