Here is the scientifically rigorous English translation of the Reverse Osmosis (RO) Membrane Process for Purified Water Production, compliant with GB 5749-2022 and NSF/ANSI 58 standards for pharmaceutical/electronic/food applications:

I. Process Flow (Four-Stage Purification)

graph LR  
    A[Feed Water] --> B[Pretreatment]  
    B --> C[RO Membrane System]  
    C --> D[Post-Treatment]  
    D --> E[Purified Water Tank]  
      
    subgraph **Core Purification**  
    B -->|Multistage Filtration + Softening| C  
    C -->|Salt Rejection>99%| D  
    D -->|UV + Polishing Mixed Bed| E  
    end  

II. Scientific Process Design

1. Pretreatment (Critical Fouling Barrier)

Pretreated Water Specifications:

• Residual chlorine<0.01mg/L | Fe<0.05mg/L | SDI₁₅<3 | ORP<200mV

2. RO Membrane System (Core Desalination)

Separation Mechanism:
Solution-Diffusion Model - preferential water permeation via hydrogen-bonding network

3. Post-Treatment (Polishing)

III. Critical Control Points & Validation

1. Real-Time Monitoring

# PLC Control Logic (Example)  
if TDS_in > 500ppm:                 # High salinity warning  
    adjust_pressure(↑15%)            # Maintain flux  
if permeate_cond > 10μS/cm:          # Membrane integrity check  
    trigger_alarm()                    
    auto_flush(RO_clean_mode)        # Initiate cleaning  

2. Water Quality Standards

IV. Economic & Reliability Optimization

V. Contingency Protocols

VI. Case Study (Pharmaceutical Purified Water)

System Recovery: 78% | Membrane Life: 5 years (field data)
Key Innovation: AI fouling prediction (>92% accuracy, LSTM neural network)

This design achieves minimal energy consumption while ensuring water quality through multi-barrier protection and smart controls, compliant with ISO 13485 for medical water. Includes complete FAT/SAT protocols and 3Q (IQ/OQ/PQ) validation support.