Chemical-Free Emulsified Oil Removal: How SINOKLE Innovation Reshapes Industrial Wastewater Treatment
In industrial wastewater treatment, oily wastewater has always been a technical challenge, and emulsified oil in particular is an industry pain point. Conventional methods usually require large doses of chemicals, which is not only costly but also causes secondary pollution. With its innovative CDFU cyclonic dissolved-air flotation technology and a series of high-efficiency treatment units, SINOKLE Technology has successfully developed a purely physical, chemical-free emulsified oil removal process, bringing a revolutionary breakthrough to industrial wastewater treatment.
Technical principle and innovative breakthrough
The core of SINOKLE's chemical-free emulsified oil removal process is its unique CDFU (cyclonic dissolved-air flotation) technology, which creatively combines cyclonic separation, dissolved-air flotation and catalytic oxidation. By generating micro/nano bubbles, it achieves efficient oil-water separation under strong centrifugal force; a single unit can handle up to 500 m³/h with oil removal above 90%. The purely physical separation requires no chemicals and avoids secondary pollution.
The KHC coalescing oil-water separator uses super-oleophilic, hydrophobic coalescing fibre materials and internal structures to integrate cyclonic centrifugal separation, wetting coalescence, collision coalescence and interception filtration, achieving efficient coalescence, separation and removal of emulsified oil in wastewater. The unit removes emulsified oil droplets larger than 0.1 μm, resists impurities well and effectively removes suspended solids; its strong adaptability maintains stable performance even under complex water-quality conditions.
Process flow for treating highly emulsified acidic oily wastewater
Process performance and treatment results
SINOKLE's chemical-free emulsified oil removal process delivers outstanding performance. It also performs excellently in the treatment of highly emulsified acidic water from refining. Conventional gravity settling requires 50-70 hours of settling time, whereas the SINOKLE solution achieves efficient separation after only a short treatment. In a coking acidic wastewater project at a refinery, the influent oil content was as high as 160,000 mg/L, and the effluent oil content dropped significantly after treatment, demonstrating the process's outstanding capability for difficult emulsified wastewater.
Case study: highly emulsified acidic wastewater treatment project
Advantages over conventional technologies
Compared with conventional treatment technologies, SINOKLE's chemical-free emulsified oil removal process has clear advantages. The oil removal efficiency of conventional CFU is only 60%-80%, whereas CDFU exceeds 90%; for suspended solids removal, conventional technology achieves 50%-70%, whereas CDFU reaches over 80%; for fine particle removal, conventional technology can only handle particles above 5 μm, whereas CDFU can handle particles above 3 μm.
A comparison of technical features shows that conventional technology requires chemical dosing and produces large amounts of scum, with poor removal of emulsified oil and fine suspended solids. The SINOKLE solution uses a purely physical method with no chemicals, little scum and high removal rates for emulsified oil and fine suspended solids.
Economic and environmental benefits
In terms of environmental benefits, the process completely solves the secondary pollution problem of conventional processes. The chemical-free, purely physical demulsification and separation process recovers high-quality, high-concentration crude oil without generating hazardous waste such as oily sludge, creating economic value while solving environmental challenges.
Application fields and typical cases
SINOKLE's chemical-free emulsified oil removal process has been widely applied in many fields, achieving remarkable results in oilfield produced-fluid treatment, comprehensive oily waste liquid treatment in oilfield production, and refinery oily wastewater treatment.
Successful cases include a back-pressure cogeneration project in Shaanxi Province, where SINOKLE adopted a "filter + KHC coalescing oil separator" combination process to treat power-plant wastewater with an oil content as high as 500,000 ppm, finally reducing the effluent oil content to below 5 ppm, a removal rate of over 99%.
The heavy-oil power plant wastewater treatment project in Sierra Leone adopts a "CDFU+CDFU+KFM" three-stage treatment process; the influent oil content is <50 mg/L and suspended solids <80 mg/L, and after treatment the effluent oil content is <10 mg/L and suspended solids <20 mg/L, with all indicators meeting discharge standards.
Technology outlook and trends
As environmental requirements become stricter and industrial wastewater treatment technology advances, SINOKLE's chemical-free emulsified oil removal process represents the direction of the industry. Its purely physical treatment, high separation performance, low operating cost and environmental friendliness give it broad application prospects in the industrial wastewater treatment market.
