Variable Seawater Quality
Seasonal changes affected turbidity and biological activity.
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120m³/h UF Pretreatment System for SWRO Plant
Seawater Desalination Project · Oman
120m³/h UF Pretreatment System for SWRO Plant
A corrosion-resistant ultrafiltration solution designed to deliver stable low-turbidity, low-SDI feedwater and protect the downstream seawater reverse osmosis system.
Project Overview
Coastal Desalination PlantA coastal desalination plant in Oman required reliable pretreatment for an SWRO system supplying local industrial and municipal applications.
The raw seawater contained suspended solids, marine colloids, algae and microorganisms. Without effective pretreatment, these contaminants could increase membrane fouling, cleaning frequency and operating costs.
Zhongnuo supplied a 120m³/h seawater ultrafiltration system to stabilize feedwater quality before desalination.
| Item | Project Details |
|---|---|
| Location | Oman, Middle East |
| Application | SWRO pretreatment |
| Raw water | Coastal seawater |
| UF membrane | Fouling-resistant PVDF |
| Piping | SS316L, corrosion controlled |
| Cleaning | Backwash + CEB + CIP |
| Control | Automatic PLC |
Actual recovery and outlet quality depend on seawater conditions, membrane flux and cleaning requirements.
Customer Challenges
Operating ConditionsUnstable SWRO Feed SDI
Conventional pretreatment could not maintain consistent feed quality.
Membrane Fouling
Solids, colloids and microorganisms increased SWRO cleaning demand.
Coastal Corrosion
High salinity and salt fog required corrosion-resistant materials.
Continuous Demand
The desalination plant required uninterrupted pretreatment-water supply.
Backwash Water Loss
High recovery was needed to reduce seawater intake and waste.
Customized UF Solution
Designed for SeawaterThe system uses high-fouling-resistance PVDF hollow-fiber membranes for solids-rich and biologically active seawater. Automatic backwashing removes accumulated particles, CEB controls organic and biological fouling, and periodic CIP restores membrane performance when required.
Multiple UF trains operate in parallel with staggered backwash cycles, allowing the plant to maintain net output while individual trains are cleaned.
Recovery reference: At 93% recovery, approximately 129 m³/h of feedwater is required to produce 120 m³/h of UF filtrate.
PVDF UF MembranesSelected for fouling resistance and stable filtration.
Parallel Membrane TrainsStaggered cleaning supports continuous supply.
Backwash + CEBControls particulate, organic and biological fouling.
Independent CIPRestores performance based on operating data.
SS316L PipingImproved resistance in coastal salt-fog conditions.
Automatic PLC ControlManages filtration, cleaning, alarms and protection.
Treatment Process
UF + SWRO IntegrationSeawater Intake
Screening
Coagulation, If Required
Self-Cleaning Filter
Ultrafiltration System
UF Water Tank
Cartridge Filter & HP Pump
SWRO System
UF removes suspended solids, colloids, algae and microorganisms. It does not remove dissolved salts; desalination is completed by the downstream SWRO membranes.
Project Results
Performance Under Design ConditionsStable Filtrate Quality
UF turbidity controlled at ≤0.1 NTU.
Low-SDI SWRO Feed
SDI₁₅ controlled at ≤2.5.
Effective Solids Removal
Suspended solids and marine colloids significantly reduced.
Reduced Fouling Pressure
More stable feedwater protected downstream SWRO membranes.
Continuous Filtration
Staggered backwashing maintained automatic production.
Coastal-Site Suitability
Corrosion-control design improved environmental adaptability.
Project Highlights
Reliable SWRO ProtectionDedicated SWRO PretreatmentDesigned around coastal seawater conditions.
92%–95% RecoveryReduced intake demand and backwash-water loss.
Fouling-Resistant PVDFSupports challenging biological feedwater.
Three-Level CleaningAutomatic backwash, CEB and CIP.
Corrosion-Resistant DesignSS316L piping for selected seawater service.
Automatic OperationPLC-managed filtration, cleaning and protection.
This project shows how a properly designed industrial ultrafiltration system can stabilize feedwater and protect downstream seawater desalination equipment.
Planning an SWRO Pretreatment Project?
Send your seawater analysis, required capacity and SWRO feedwater target for a customized proposal.
Seawater Desalination Project · Oman
120m³/h UF Pretreatment System for SWRO Plant
A corrosion-resistant ultrafiltration solution designed to deliver stable low-turbidity, low-SDI feedwater and protect the downstream seawater reverse osmosis system.
Project Overview
Coastal Desalination PlantA coastal desalination plant in Oman required reliable pretreatment for an SWRO system supplying local industrial and municipal applications.
The raw seawater contained suspended solids, marine colloids, algae and microorganisms. Without effective pretreatment, these contaminants could increase membrane fouling, cleaning frequency and operating costs.
Zhongnuo supplied a 120m³/h seawater ultrafiltration system to stabilize feedwater quality before desalination.
| Item | Project Details |
|---|---|
| Location | Oman, Middle East |
| Application | SWRO pretreatment |
| Raw water | Coastal seawater |
| UF membrane | Fouling-resistant PVDF |
| Piping | SS316L, corrosion controlled |
| Cleaning | Backwash + CEB + CIP |
| Control | Automatic PLC |
Actual recovery and outlet quality depend on seawater conditions, membrane flux and cleaning requirements.
Customer Challenges
Operating ConditionsVariable Seawater Quality
Seasonal changes affected turbidity and biological activity.
Unstable SWRO Feed SDI
Conventional pretreatment could not maintain consistent feed quality.
Membrane Fouling
Solids, colloids and microorganisms increased SWRO cleaning demand.
Coastal Corrosion
High salinity and salt fog required corrosion-resistant materials.
Continuous Demand
The desalination plant required uninterrupted pretreatment-water supply.
Backwash Water Loss
High recovery was needed to reduce seawater intake and waste.
Customized UF Solution
Designed for SeawaterThe system uses high-fouling-resistance PVDF hollow-fiber membranes for solids-rich and biologically active seawater. Automatic backwashing removes accumulated particles, CEB controls organic and biological fouling, and periodic CIP restores membrane performance when required.
Multiple UF trains operate in parallel with staggered backwash cycles, allowing the plant to maintain net output while individual trains are cleaned.
Recovery reference: At 93% recovery, approximately 129 m³/h of feedwater is required to produce 120 m³/h of UF filtrate.
PVDF UF MembranesSelected for fouling resistance and stable filtration.
Parallel Membrane TrainsStaggered cleaning supports continuous supply.
Backwash + CEBControls particulate, organic and biological fouling.
Independent CIPRestores performance based on operating data.
SS316L PipingImproved resistance in coastal salt-fog conditions.
Automatic PLC ControlManages filtration, cleaning, alarms and protection.
Treatment Process
UF + SWRO IntegrationSeawater Intake
Screening
Coagulation, If Required
Self-Cleaning Filter
Ultrafiltration System
UF Water Tank
Cartridge Filter & HP Pump
SWRO System
UF removes suspended solids, colloids, algae and microorganisms. It does not remove dissolved salts; desalination is completed by the downstream SWRO membranes.
Project Results
Performance Under Design ConditionsStable Filtrate Quality
UF turbidity controlled at ≤0.1 NTU.
Low-SDI SWRO Feed
SDI₁₅ controlled at ≤2.5.
Effective Solids Removal
Suspended solids and marine colloids significantly reduced.
Reduced Fouling Pressure
More stable feedwater protected downstream SWRO membranes.
Continuous Filtration
Staggered backwashing maintained automatic production.
Coastal-Site Suitability
Corrosion-control design improved environmental adaptability.
Project Highlights
Reliable SWRO ProtectionDedicated SWRO PretreatmentDesigned around coastal seawater conditions.
92%–95% RecoveryReduced intake demand and backwash-water loss.
Fouling-Resistant PVDFSupports challenging biological feedwater.
Three-Level CleaningAutomatic backwash, CEB and CIP.
Corrosion-Resistant DesignSS316L piping for selected seawater service.
Automatic OperationPLC-managed filtration, cleaning and protection.
This project shows how a properly designed industrial ultrafiltration system can stabilize feedwater and protect downstream seawater desalination equipment.
Planning an SWRO Pretreatment Project?
Send your seawater analysis, required capacity and SWRO feedwater target for a customized proposal.
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