SEARCH WHAT YOU WANT
Industrial RO Water Pretreatment System
The industrial RO water pretreatment system removes sediment, turbidity, residual chlorine, hardness, organic matter, iron, and manganese before water enters the reverse osmosis unit.
Proper pretreatment reduces RO membrane fouling and scaling, improves system stability, and lowers long-term maintenance costs. Zhongnuo provides customized pretreatment systems from 0.25 m³/h to 100 m³/h for continuous industrial operation.
The industrial RO water pretreatment system removes sediment, turbidity, residual chlorine, hardness, organic matter, iron, and manganese before water enters the reverse osmosis unit.
Proper pretreatment reduces RO membrane fouling and scaling, improves system stability, and lowers long-term maintenance costs. Zhongnuo provides customized pretreatment systems from 0.25 m³/h to 100 m³/h for continuous industrial operation.
Previous: Pretreatment System
Next: No more data
Share to
Product Description
1. Suitable Raw Water
The system can be designed for:
- Borehole and well water
- River, lake, and surface water
- Municipal tap water
- Low- and medium-TDS brackish water
- Industrial process and recycled water
The final configuration is selected according to turbidity, hardness, SDI, chlorine, iron, manganese, silica, and organic content.
2. Typical Pretreatment Process
Raw Water → Raw Water Tank → Feed Pump → Multimedia Filter → Activated Carbon Filter → Water Softener or Antiscalant Dosing → 5 μm Cartridge Filter → RO System
Different water conditions may require additional treatment:
- ♦ High iron and manganese: Oxidation and manganese sand filtration
- ♦ High hardness: Water softener or antiscalant dosing
- ♦ High turbidity: Enhanced multimedia filtration or ultrafiltration
- ♦ Surface water: Coagulation, dosing, and UF pretreatment
- ♦ High organic content: Activated carbon or additional oxidation
For raw water with heavy suspended solids or microorganisms, an ultrafiltration system can be installed before the industrial RO system.
3. Target Pretreated Water Quality
| Parameter | Typical Design Target |
|---|---|
| Outlet turbidity | ≤1 NTU |
| SDI | ≤3 |
| Cartridge filtration | 5 μm |
| Residual chlorine | Within RO membrane inlet limit |
| Suspended solids | Significantly reduced |
| Scaling risk | Controlled through softening or dosing |
Actual performance depends on the raw-water analysis, treatment process, flow rate, and operating conditions.
4. Main Technical Parameters
| Item | Specification |
| Capacity | 0.25–100 m³/h, customizable |
| Standard process | Multimedia + activated carbon + cartridge filtration |
| Standard inlet turbidity | ≤50 NTU |
| Operating mode | Manual or fully automatic |
| Working temperature | 5–45°C |
| Filter-tank material | FRP, carbon steel, SS304 or SS316 |
| Pipeline material | UPVC or stainless steel |
| Backwashing | Manual or automatic |
| Application | RO and industrial water pretreatment |
5. Optional Configurations
| Optional Unit | Main Function |
| Automatic backwashing | Reduces manual operation |
| Water softener | Removes calcium and magnesium hardness |
| Antiscalant dosing | Controls carbonate, sulfate, and silica scaling |
| Iron and manganese filter | Treats colored groundwater and metal deposits |
| Ultrafiltration | Removes fine particles, colloids, and microorganisms |
| Chemical dosing system | Supports oxidation, coagulation, and pH adjustment |
| SS304 or SS316 construction | Suitable for hygienic or corrosive applications |
| PLC control | Automatic operation, monitoring, and alarms |
6. Applications
Industrial RO pretreatment systems are widely used in:
- ♦ Food and beverage production
- ♦ Pharmaceutical manufacturing
- ♦ Electronics and ultrapure water plants
- ♦ Chemical processing
- ♦ Textile printing and dyeing
- ♦ Boiler feedwater treatment
- ♦ Mining and remote camps
- ♦ Bottled-water plants
- ♦ Industrial parks
- ♦ Borehole water purification
For groundwater applications, refer to our borehole water treatment guide.
7. Why Proper RO Pretreatment Matters
Insufficient pretreatment may cause:
- ♦ Rapid RO membrane fouling
- ♦ Mineral scaling
- ♦ Higher operating pressure
- ♦ Reduced product-water flow
- ♦ Unstable permeate quality
- ♦ Frequent membrane cleaning
- ♦ Shorter membrane service life
The pretreatment process should therefore be based on the actual water report instead of using the same standard configuration for every project.
8. Frequently Asked Questions
Is pretreatment necessary for every RO system?
Yes. The required treatment stages may vary, but sediment control and cartridge filtration are normally necessary to protect RO membranes.
Can the pretreatment process be customized?
Yes. Iron removal, softening, chemical dosing, ultrafiltration, and other stages can be added according to the raw-water analysis.
How is the correct capacity selected?
Pretreatment flow must satisfy the RO feed-water requirement rather than only the RO product-water capacity. Recovery rate, backwashing demand, and operating margin must also be considered.
How often should filter media be replaced?
Replacement depends on raw-water quality, operating hours, backwashing performance, and media condition. Regular pressure and water-quality monitoring is recommended.
Can the system operate automatically?
Yes. Automatic backwashing, dosing, water-level control, valve operation, and fault alarms can be integrated through PLC control.
Information Required for a Quotation
Please provide:
- Raw-water source and analysis report
- Required RO product-water capacity
- Daily operating hours
- Turbidity, hardness, iron, manganese, and TDS
- Tank and pipeline material requirements
- Manual or automatic operation preference
- Local voltage, frequency, and phase
- Installation conditions and destination
Zhongnuo Water Treatment will select the appropriate filtration process and prepare a customized technical proposal based on your project data.
1. Suitable Raw Water
The system can be designed for:
- Borehole and well water
- River, lake, and surface water
- Municipal tap water
- Low- and medium-TDS brackish water
- Industrial process and recycled water
The final configuration is selected according to turbidity, hardness, SDI, chlorine, iron, manganese, silica, and organic content.
2. Typical Pretreatment Process
Raw Water → Raw Water Tank → Feed Pump → Multimedia Filter → Activated Carbon Filter → Water Softener or Antiscalant Dosing → 5 μm Cartridge Filter → RO System
Different water conditions may require additional treatment:
- ♦ High iron and manganese: Oxidation and manganese sand filtration
- ♦ High hardness: Water softener or antiscalant dosing
- ♦ High turbidity: Enhanced multimedia filtration or ultrafiltration
- ♦ Surface water: Coagulation, dosing, and UF pretreatment
- ♦ High organic content: Activated carbon or additional oxidation
For raw water with heavy suspended solids or microorganisms, an ultrafiltration system can be installed before the industrial RO system.
3. Target Pretreated Water Quality
| Parameter | Typical Design Target |
|---|---|
| Outlet turbidity | ≤1 NTU |
| SDI | ≤3 |
| Cartridge filtration | 5 μm |
| Residual chlorine | Within RO membrane inlet limit |
| Suspended solids | Significantly reduced |
| Scaling risk | Controlled through softening or dosing |
Actual performance depends on the raw-water analysis, treatment process, flow rate, and operating conditions.
4. Main Technical Parameters
| Item | Specification |
| Capacity | 0.25–100 m³/h, customizable |
| Standard process | Multimedia + activated carbon + cartridge filtration |
| Standard inlet turbidity | ≤50 NTU |
| Operating mode | Manual or fully automatic |
| Working temperature | 5–45°C |
| Filter-tank material | FRP, carbon steel, SS304 or SS316 |
| Pipeline material | UPVC or stainless steel |
| Backwashing | Manual or automatic |
| Application | RO and industrial water pretreatment |
5. Optional Configurations
| Optional Unit | Main Function |
| Automatic backwashing | Reduces manual operation |
| Water softener | Removes calcium and magnesium hardness |
| Antiscalant dosing | Controls carbonate, sulfate, and silica scaling |
| Iron and manganese filter | Treats colored groundwater and metal deposits |
| Ultrafiltration | Removes fine particles, colloids, and microorganisms |
| Chemical dosing system | Supports oxidation, coagulation, and pH adjustment |
| SS304 or SS316 construction | Suitable for hygienic or corrosive applications |
| PLC control | Automatic operation, monitoring, and alarms |
6. Applications
Industrial RO pretreatment systems are widely used in:
- ♦ Food and beverage production
- ♦ Pharmaceutical manufacturing
- ♦ Electronics and ultrapure water plants
- ♦ Chemical processing
- ♦ Textile printing and dyeing
- ♦ Boiler feedwater treatment
- ♦ Mining and remote camps
- ♦ Bottled-water plants
- ♦ Industrial parks
- ♦ Borehole water purification
For groundwater applications, refer to our borehole water treatment guide.
7. Why Proper RO Pretreatment Matters
Insufficient pretreatment may cause:
- ♦ Rapid RO membrane fouling
- ♦ Mineral scaling
- ♦ Higher operating pressure
- ♦ Reduced product-water flow
- ♦ Unstable permeate quality
- ♦ Frequent membrane cleaning
- ♦ Shorter membrane service life
The pretreatment process should therefore be based on the actual water report instead of using the same standard configuration for every project.
8. Frequently Asked Questions
Is pretreatment necessary for every RO system?
Yes. The required treatment stages may vary, but sediment control and cartridge filtration are normally necessary to protect RO membranes.
Can the pretreatment process be customized?
Yes. Iron removal, softening, chemical dosing, ultrafiltration, and other stages can be added according to the raw-water analysis.
How is the correct capacity selected?
Pretreatment flow must satisfy the RO feed-water requirement rather than only the RO product-water capacity. Recovery rate, backwashing demand, and operating margin must also be considered.
How often should filter media be replaced?
Replacement depends on raw-water quality, operating hours, backwashing performance, and media condition. Regular pressure and water-quality monitoring is recommended.
Can the system operate automatically?
Yes. Automatic backwashing, dosing, water-level control, valve operation, and fault alarms can be integrated through PLC control.
Information Required for a Quotation
Please provide:
- Raw-water source and analysis report
- Required RO product-water capacity
- Daily operating hours
- Turbidity, hardness, iron, manganese, and TDS
- Tank and pipeline material requirements
- Manual or automatic operation preference
- Local voltage, frequency, and phase
- Installation conditions and destination
Zhongnuo Water Treatment will select the appropriate filtration process and prepare a customized technical proposal based on your project data.
Previous: Pretreatment System
Next: No more data
Get a Quote for Free
Submit this form and our sales representative will contact you soon.
ONLINE MESSAGE
Copyright © 2026 Zhongnuo Water Treatment Co., Ltd.