Mechanical Filter,activity Carbon Filter and Softening One Stage Reverse Osmosis with Aseptic Pure Water tank Plastic Water tank

This is a typical industrial water purification system, which combines mechanical filtration, activated carbon adsorption, water softening, single-stage reverse osmosis (RO) and aseptic pure water storage in plastic tanks to produce high-purity water for industrial production, food and beverage, pharmaceuticals and other fields. The following is a detailed breakdown of its components, functions, and operating principles:

System Components and Functions
Component
Core Function
Key Parameters/Design
Mechanical Filter (Mechanical Filter)
Remove suspended solids, sediment, rust, colloids, and particles above 20μm in raw water to reduce turbidity and SDI value.
- Media: Quartz sand, anthracite, etc.
- Material: FRP/Stainless steel
- Filtration accuracy: 1-20μm
Activated Carbon Filter
Adsorb residual chlorine (to <0.1mg/L), organic matter, odor, pigments, and reduce TOC; protect RO membrane from oxidation damage.
- Media: Granular activated carbon (10-20 mesh)
- Adsorption rate: ~60% for organics
- Requirement: Inlet water SDI <5
Water Softener
Remove calcium and magnesium ions via ion exchange to prevent scaling on RO membrane and pipes.
- Resin: Sodium-based cation exchange resin
- Regeneration: Salt solution backwashing
- Hardness removal: Typically to <1ppm
One-Stage Reverse Osmosis (RO) Unit
The core of the system, using a semi-permeable membrane to remove 95-99% of dissolved salts, heavy metals, bacteria, viruses, and other impurities under high pressure.
- Membrane: Polyamide composite membrane (pore size ~0.1nm)
- Pressure: 1.0-1.5MPa
- Recovery rate: 55-75%
Aseptic Pure Water Plastic Tank
Store purified water aseptically to prevent secondary contamination and maintain water quality stability.
- Material: Food-grade PE/HDPE (comply with GB 4806.7, FDA standards)
- Accessories: Respirator (PTFE filter), cleaning ball, level transmitter
- Sterilization: CIP cleaning, pasteurization (80℃)

Workflow
1. Pretreatment: Raw water first enters the mechanical filter to remove large particles, then flows through the activated carbon filter to eliminate residual chlorine and organics, and finally passes through the water softener to reduce hardness, ensuring the inlet water meets RO membrane requirements.
2. RO Purification: Pressurized by a high-pressure pump, the pretreated water enters the RO membrane module. Water molecules pass through the membrane to become permeate (product water), while concentrated water (containing impurities) is discharged.
3. Storage: The product water is stored in an aseptic plastic tank, equipped with a hydrophobic vent filter and cleaning system to prevent microbial contamination and biofilm formation.

Key Advantages and Application Scenarios
1. Advantages:
◦ High Purity: RO removes most dissolved salts and microbes, with product water conductivity ≤1.3μS/cm (25℃).
◦ Cost-Effective: Single-stage RO has lower energy consumption than distillation; plastic tanks reduce costs vs. stainless steel.
◦ Stable Operation: Pretreatment protects RO membrane, extending its lifespan (typically 2-3 years).
◦ Aseptic Storage: Plastic tanks with respirators and CIP systems maintain water quality for long-term storage.
2. Application Scenarios:
◦ Industrial: Electronic component cleaning, electroplating, chemical reagents.
◦ Food and Beverage: Bottled water, beverage production, brewing.
◦ Pharmaceutical: Purified water for preparations, laboratory testing.
◦ Other: Cosmetics production, high-purity cleaning water supply.

Operation and Maintenance Notes
1. Pretreatment Maintenance:
◦ Backwash mechanical filter daily (10-20 minutes) to prevent clogging.
◦ Replace activated carbon every 6-12 months or when effluent chlorine exceeds 0.1mg/L.
◦ Regenerate softener resin with salt solution when water hardness rises.
2. RO System Maintenance:
◦ Monitor inlet pressure, product water flow, and conductivity regularly.
◦ Clean membrane with acid/alkali every 3-6 months to remove scaling and organic contamination.
◦ Replace membrane every 2-3 years or when desalination rate drops below 90%.
3. Storage Tank Maintenance:
◦ Perform CIP cleaning and pasteurization monthly to control microbial count ≤100 CFU/mL.
◦ Replace hydrophobic vent filter every 6 months to prevent airborne contamination.
This system balances purification efficiency, operational cost, and water quality stability, making it a widely used water treatment solution in medium and small-scale high-purity water demand scenarios.