Nanjing Bidun Environmental Protection
A revolutionary approach to oil-water separation that breaks through the limitations of traditional adsorption-based methods
As the core original technology of Nanjing Bidun, the Interception Oil Removal Technology breaks through the limitations of traditional adsorption-based oil removal. Relying on independently developed special composite modified materials, it builds an efficient "oil-water separation barrier". Its core principle is "water permeation while oil interception" — a brand-new oil-water separation concept different from "adsorption oil removal".
It utilizes the unique HK fiber (formed by technical modification of certain fibers) to create a membrane material, namely the HK Interception Membrane, for separating hydrophobic dispersoids in water.
When the HK Interception Membrane is immersed in water, the HK fibers in the membrane react with water, forming a uniform, dense, and stable associated water film on the fiber surface. At this point, the membrane exhibits strong oil repellency.
When oil-containing water passes through the activated HK Interception Membrane, water molecules can displace and permeate through the water molecules in the membrane. Oil and other hydrophobic dispersoids cannot displace the associated water and are selectively intercepted.
Oil droplets blocked during operation remain on the outer surface of the membrane. As oil droplets accumulate, they coalesce to form larger oil droplets, which rise under buoyancy, achieving true oil-water separation.
Interception Oil Removal Technology Schematic
[Visual representation of the oil-water separation process]
It can achieve an oil-water separation precision of below 0.1 mg/L, which is unimaginable in traditional processes based on the "adsorption" principle.
Years of operation practice show that our equipment maintains oil removal precision within the designed range throughout its service life.
Can achieve rated oil removal precision even under short-term high oil shock loads of 300-500 mg/L or even 1000 mg/L.
A purely physical process with no chemical agents added during operation, eliminating the need for backwashing.
The interception unit has automatic self-purification and recovery capability after abnormal conditions are eliminated.
Excellent performance at water temperatures up to 95 °C, fully retaining the thermal energy of condensed water.
Precision can be designed to 0.5mg/L, 0.3mg/L, or even higher according to customer requirements.
Enables high-precision separation of oil-containing wastewater, realizing separate recovery of oil and water.
Extremely easy to operate and does not require dedicated personnel for on-site operation.
No water, energy, or chemical consumption for backwashing or regeneration during the effective service life.