SFM™ Filter

SFM™ Filter is developed by SINOKLE. Using its self-developed new SFM™ Surface-Modified Filtration Media. Based on the specific characteristics of the oily wastewater and treatment requirements, the filter bed and filter structure are designed on a one-to-one basis, optimizing the internal water distribution, water collection structure, and backwash process. Key flow-through components are made of all-titanium materials. Through backwash tests on wastewater with different crude oil densities and resistance characteristics, a reasonable and economical backwash intensity is determined, shortening backwash time and reducing backwash water consumption, thereby improving wastewater treatment efficiency, reducing energy consumption, and saving costs.

SINOKLE's SFM™ Surface-Modified Filtration Media is produced using a special process that covalently introduces high-density hydrophilic groups (e.g., –OH, –COOH, –SO₃H, etc.) onto the surface. Water molecules form a dense hydration layer with a thickness of δ≥8 nm through strong hydrogen bonding, reducing the static contact angle to θ<5° and achieving a fully spreading state. The fouling process shifts from "irreversible adhesion" to "reversible deposition," lowering the critical shear stress required for detachment. Regular water backwashing can achieve >95% desorption, extending the backwash cycle by 3–5 times and significantly reducing energy and water consumption.

SFM™ Surface-Modified Filtration Media features active groups and micro-nano structures on its surface that interact with emulsified droplets, disrupting the adsorption equilibrium on the oil droplet surface and reducing droplet stability. As the emulsion passes through the media layer, oil droplets coalesce, collide, and aggregate at the micro-nano structures and active sites on the media surface.

SFM™ The surface-modified quartz sand media exhibits extremely strong hydrophilicity: water spreads rapidly over its surface and passes smoothly through the media pores, forming a stable hydrophilic coating film. When oily wastewater flows through the media layer, the water phase, driven by the superhydrophilic surface, preferentially passes through the media, while hydrophobic emulsified oil droplets are intercepted and adsorbed on the media surface, continuously accumulating. Under hydraulic force, they collide and coalesce, gradually forming larger oil droplets that rise to the surface, ultimately achieving separation from the oil phase.