Breaking the Limits of Oily Wastewater Treatment: Why Our PEK Tubular Membranes Outperform Traditional PVDF
Managing industrial effluents heavily laden with free and highly stable emulsified oils remains a core operational bottleneck across the petrochemical, mechanical processing, and food manufacturing sectors. Conventional settling, skimming, and standard flotation processes consistently fail against micro-emulsions, making it difficult to meet increasingly stringent environmental discharge regulations.
To definitively solve this industry-wide challenge, we have introduced our PEK (Polyetherketone) Special Oil Removal Tubular Membrane System, engineered specifically for harsh oily conditions. Compared to standard PVDF or PES membranes common in the market, our PEK material represents a revolutionary breakthrough in foundational material science.
The Material Advantage: PEK vs. PVDF
Standard PVDF or PES tubular membranes suffer from severe hydrophobic interactions when exposed to high oil concentrations. Oil droplets rapidly adhere to and constrict the pores, leading to an unacceptable flux decline of up to 40% within the very first few weeks of operation.
To combat this, our engineering team utilizes specialized PEK material, granting our membrane modules three irreplaceable advantages:
- Extreme Hydrophilicity and Oil Resistance (Oleophobicity): PEK material possesses remarkable surface hydrophilicity. During operation, water molecules preferentially form a dense hydration layer on the membrane surface, effectively blocking oil droplets from direct contact. This exceptional inherent oil resistance ensures exceptionally steady permeate flow rates, even during sudden spikes in influent oil loads and turbidity.
- Indestructible Resistance to Strong Alkali Cleaning: Chemical cleaning is unavoidable in oily wastewater systems. Traditional PVDF membranes are prone to aging and embrittlement when exposed to high-pH caustic cleaners over time. In contrast, our PEK membranes boast top-tier chemical resistance, easily withstanding repeated high-concentration strong alkali washes. This effectively strips away stubborn oil and organics, cuts chemical-in-place (CIP) frequencies by more than half, and ensures full baseline permeability recovery.
- Ultimate Oil Removal under High Mechanical Stress: Under the extreme cross-flow velocities required for self-cleaning, PEK membranes exhibit superior mechanical strength without fiber breakage. Empirical data proves our system effortlessly reduces produced water oil content to strictly below 5 mg/L, consistently achieving an overall oil removal rate exceeding 99%.
Expert Advice from Our Water Treatment Engineers
While our PEK membranes offer unmatched performance, we always emphasize holistic system design to our clients. When implementing an oily wastewater treatment project, please note these crucial engineering details:
- Do Not Skip Pre-treatment: High-performance membranes do not eliminate the need for preliminary mechanical screening or dissolved air flotation (DAF). Debris like raw plastics, abrasive grit, or extreme bulk-free oil can cause severe physical abrasion, permanently damaging the filtration layer.
- Precise Pumping Hydrodynamics: Optimal anti-fouling performance relies heavily on intense surface shear forces to continuously scour the membrane walls. Failing to upgrade recirculation pumps to maintain critical cross-flow velocities will result in sluggish fluid movement, paradoxically increasing fouling rates and negating the material's inherent anti-pollution benefits.
Conclusion
For industrial environments constantly struggling with complex, highly emulsified effluents and excessive organic loads, upgrading to our Oil-Resistant PEK Tubular Membrane system stands out as the definitively superior engineering choice. Leveraging top-tier material science and professional engineering support, we will help you transform heavily polluted wastewater streams into compliant, predictable, and environmentally sustainable continuous processes.
Oil-Resistant PEK Tubular Membrane system,Oil Removal Solution
No. 55 Wuliu Avenue, Xinzhan Hi-Tech Zone, Hefei, Anhui, China