BW30-400 IG Reverse Osmosis Membrane—A Reliable Solution for High-Flow Industrial Water Treatment

Working Process 

• Feedwater Pretreatment
  Raw water undergoes filtration (e.g., multi-media filtration, ultrafiltration) and chemical dosing (e.g., antiscalants, biocides) to meet RO feedwater requirements (e.g., turbidity <1 NTU, free chlorine <0.1 ppm).
• Pressure-Driven Separation
  
  1. High-pressure pumps pressurize feedwater to 150–400 psi (depending on salinity and temperature), directing flow into the membrane element.
  2. The polyamide composite layer (semi-permeable membrane) allows water molecules to pass while rejecting:
     • Dissolved salts (e.g., Na⁺, Cl⁻, Ca²⁺, Mg²⁺) with ≥99.5% salt rejection.
     • Organics (molecular weight >100 Da), colloids, bacteria, and viruses.
• Product and Concentrate Streams
  
  1. Product water (permeate): Passes through the membrane into the central tube as purified, low-salinity water.
  2. Concentrate (reject stream): Carries rejected contaminants out of the element; partial recycling improves recovery.
• Energy Recovery and Discharge
  
  1. Concentrate can be processed through energy recovery devices (e.g., PX) to reduce system energy consumption.
  2. High-salinity concentrate must be discharged compliantly or further treated (e.g., evaporation crystallization).

Product Advantages

• High resistance to compaction, abrasion, and chemical degradation: Proprietary membrane materials and manufacturing ensure durability.
• Broad pH tolerance: Enables aggressive cleaning with standard acids/bases, reducing long-term operating costs.
• No pinhole defects: Flawless membrane surface without patches or repairs.
• Extended lifespan: Thicker, more uniform, and smoother active layer ensures long-term stability.
• High cleaning efficiency: Wider feed channels minimize fouling and enhance cleanability.

Applications in High-Flow Industrial Water Treatment

• Electronics: Ultrapure water for semiconductor manufacturing.

• Power: Boiler feedwater treatment to prevent scaling.

• Pharmaceutical: High-purity water meeting GMP standards.

• Chemical: High-salinity wastewater reuse to cut costs.