Many project operators ignore complete ultrafiltration pretreatment, leading to irreversible scratch and biological fouling of expensive RO membrane. Conventional multimedia filter and security filter can only trap large sand grains, but cannot remove nano-scale colloids, algae and microorganisms in raw water, which will rapidly accumulate biofilm on RO surface and shorten membrane service life by half or more. Our PVDF external pressure hollow fiber UF membrane adopts super hydrophilic modified raw material with 0.01μm filtration precision, removing over 99% of colloids, bacteria and suspended micro-particles, and stably control inlet SDI value below 3 for all LF series RO membrane (XULP/ULP/BW/BW-FR/SW). Its outstanding chlorine resistance tolerates high-concentration sodium hypochlorite backwashing without fiber breakage, suitable for all high-turbidity complex water sources.
Matched with 5μm large-flow security filter after ultrafiltration, it forms two-stage solid-liquid separation protection for reverse osmosis elements. All PVDF UF module specifications and matched full-series RO membranes can be browsed in our water filter element series.
Main Industrial Application Scenarios
1. All LF series RO membrane system front-end protective pretreatment
2. Oilfield oily produced water solid-liquid separation treatment
3. Municipal sewage reuse pre-filtration process section
4. Power plant circulating cooling water turbidity reduction equipment
5. Printing & dyeing high organic wastewater primary filtration
6. Seawater desalination multi-stage pre-treatment system
Core PVDF UF Membrane Performance Advantages
1. Super hydrophilic modified fiber, hard to adsorb oil and organic pollutants
2. Ultra-high tensile strength, no fiber fracture under high-flow backwash impact
3. Excellent oxidation resistance, tolerate long-term 5000ppm sodium hypochlorite cleaning
4. Automatic online backwashing design, cut manual maintenance labor cost greatly
5. Adjustable membrane area from small 6㎡ to large 75㎡ for different tonnage RO systems
6. Perfect compatible with all industrial 40/80 inch RO membrane elements
Full PVDF External Pressure UF Complete Model List
LF-UF-4046W, LF-UF-6060W, LF-UF-8060W, LF-UF-2880W, LF-UF-1060W
Our technical team recommends the standard full-process water treatment flow: Raw water → Multimedia filter → PVDF UF Membrane → High-flow security filter → High-pressure pump → RO Membrane, which completely solves two major RO failure problems: particle scratch and biological fouling.
If you are interested in us or have any questions, please contact us.
