Here is the English translation of the industrial ultrafiltration membranes used in landfill leachate treatment and their cross-industry applications:

I. Main Types of Ultrafiltration Membranes for Landfill Leachate Treatment

1. Polyvinylidene Fluoride (PVDF) Hollow Fiber Membranes

• Key Advantages:
  • High mechanical strength (tensile strength ≥8 N), breakage-resistant
  • Resistant to strong oxidants (tolerates up to 5,000 ppm NaClO)
  • Permanently hydrophilic modification (contact angle <40°), organic fouling resistance
• Applications:
  • Advanced treatment of biochemical effluent
  • Pretreatment for reverse osmosis (RO) systems
  • 

2. Reinforced Polyethersulfone (PES) Capillary Membranes

• Key Advantages:
  • Narrow pore size distribution (0.02–0.04 μm), SS removal >99.9%
  • Acid/alkali resistant (pH 1–13), withstands frequent CIP cleaning
  • Multi-layer composite support (anti-collapse)
• Applications:
  • Direct solid-liquid separation for high-concentration leachate (COD>15,000 mg/L)
  • Tubular ultrafiltration (TUF) systems for high-viscosity wastewater

Industry Share: PVDF membranes dominate >70% of leachate projects (e.g., Suez ZeeWeed®, MEMSTAR), while PES membranes are used for challenging wastewater (e.g., Koch PURON®).

II. Cross-Industry Applications of Ultrafiltration Membranes

1. Municipal Wastewater Treatment & Reuse

• Applications:
  • MBR processes replacing secondary sedimentation tanks (effluent quality: Class IV surface water)
  • WWTP upgrades (e.g., Beijing Gaobeidian Reclamation Plant)
• Advantages:
  • 50% footprint reduction, effluent SS<5 mg/L
  • Tolerates influent fluctuations (e.g., stormwater SS surges)

2. Food & Beverage Processing

• Applications:
  • Juice clarification (replacing diatomaceous earth, e.g., orange juice production)
  • Whey protein concentration (dairy processing)
  • Beer/liquor sterilization (alternative to pasteurization)
• Advantages:
  • Preserves flavor compounds (zero thermal damage)
  • Complies with FDA/EC food-contact standards

3. Biopharmaceuticals & Healthcare

• Applications:
  • Sterile filtration of vaccines/antibodies (0.1 μm membrane replaces traditional filters)
  • Blood product separation (plasma protein purification)
  • Purified Water for Injection (WFI) preparation
• Advantages:
  • Absolute sterilization (LRV>7), chemical-free
  • Complies with GMP/FDA 21 CFR Part 177

4. Electronics Industry Ultrapure Water (UPW)

• Applications:
  • Pre-treatment for semiconductor cleaning water (removing nanoparticles)
  • Etchant recovery in LCD panel manufacturing
• Advantages:
  • Product water TOC<5 ppb (meets ASTM E1 UPW standards)
  • Resists strong oxidants (e.g., H₂O₂ cleaning)

5. Chemicals & Electrocoating

• Applications:
  • Electropaint recovery (automotive coating lines, recovery >98%)
  • Oily wastewater treatment (machining coolants)
• Advantages:
  • Solvent-resistant (e.g., acetone, xylene)
  • Membrane lifespan >5 years (harsh chemical environments)

III. Cross-Industry Performance Requirements

IV. Engineering Selection Guidelines

1. Leachate Projects:

   • Submerged PVDF Membranes (e.g., Suez ZeeWeed®) – For MBR with high MLSS (>15 g/L)
   • External PES Membranes (e.g., Koch TARGA®) – For high-TSS (>5,000 mg/L) tubular systems

2. Cross-Industry Adaptation:

   • Hydrophilic Modification: Low protein adsorption coating for food/pharma
   • Structural Reinforcement: Reinforced fibers for chemical industry
   • Sanitary Design: Dead-end free housings (3A/SMS compliant) for food/pharma

V. Representative Projects

1. Landfill Leachate:
   • Shanghai Laogang Landfill: PVDF MBR membranes (200 units), treating 20,000 mg/L COD leachate, membrane lifespan >5 years.
2. Food Industry:
   • Coca-Cola Juice Line: PES UF for orange juice clarification, flux 60 LMH, saves ¥3M/year in diatomaceous earth costs.
3. Electronics:
   • TSMC Wafer Fab: PVDF UF for UPW, particle count <5/mL (≥0.1 μm).

Conclusion

Core UF membranes (PVDF/PES) for landfill leachate treatment demonstrate extreme environment adaptability, enabling seamless deployment in municipal wastewater, food & beverage, biopharma, and electronics industries. Selection criteria vary by sector:

• Leachate/Chemicals: Prioritize chemical/mechanical robustness → PVDF
• Food/Pharma: Focus on sanitary design + low adsorption → Modified PES
• Electronics/Municipal: Emphasize high flux + low energy → Hydrophilic PVDF
  As a platform technology, UF membranes achieve cross-industry versatility through customized engineering, making them indispensable for advanced separation processes.