ISO 9001 / 14001 / 45001 & CE Certified 38+ Patented Water Innovations

Wholesale Seawater RO System Factory & Supplier

Global Tier-1 OEM/ODM Precision Manufacturing of Containerized SWRO Desalination Plants, High-Pressure DTRO Brine Concentrators, and Zero Liquid Discharge (ZLD) Systems.

Direct Sourcing Catalog

High-Performance Seawater & Membrane Equipment

Engineered to withstand harsh marine, mining, and hyper-saline industrial environments with high-recovery energy recovery devices (ERD) and automated SCADA integration.

China High-Efficiency Brine Concentration System for Wastewater Treatment | China Suppliers & Factory Solutions Factories, Suppliers
China High-Efficiency Brine Concentration System for Wastewater Treatment | China Suppliers & Factory Solutions Factories, Suppliers
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China China Suppliers: Factory-Direct Containerized Seawater Desalination Plants for Efficient Mobile Water Solutions Factory, Suppliers
China China Suppliers: Factory-Direct Containerized Seawater Desalination Plants for Efficient Mobile Water Solutions Factory, Suppliers
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China Industrial Demineralized Water Equipment Suppliers in China - Factory Direct RO & EDI Solutions Factories, Manufacturers
China Industrial Demineralized Water Equipment Suppliers in China - Factory Direct RO & EDI Solutions Factories, Manufacturers
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Wholesale China Ultra-Pure Water System for Semiconductor & Electronics | Top Suppliers & Factory Quality Solutions Suppliers, Manufacturers
Wholesale China Ultra-Pure Water System for Semiconductor & Electronics | Top Suppliers & Factory Quality Solutions Suppliers, Manufacturers
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CE Certification China Oilfield Fracturing Flowback Fluid Treatment System - Suppliers & Factory for Zero-Discharge Solutions Factories, Factory
CE Certification China Oilfield Fracturing Flowback Fluid Treatment System - Suppliers & Factory for Zero-Discharge Solutions Factories, Factory
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Wholesale China Suppliers of Factory-Integrated Containerized Seawater Desalination Plants for Off-Grid Solar Solutions Factories, Manufacturer
Wholesale China Suppliers of Factory-Integrated Containerized Seawater Desalination Plants for Off-Grid Solar Solutions Factories, Manufacturer
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17+
Years Membrane Mastery
38+
Invention Patents
99.7%
Salt Rejection Rate
1,000+
Global Installations
Technical Architecture

Engineering Superiority: Industrial SWRO System Architecture

How Shanghai Tongjie solves membrane fouling, boron pass-through, and excessive specific energy consumption across commercial and municipal sea intakes.

Advanced Energy Recovery Devices (ERD)

Utilizing isobaric pressure exchangers (PX) to transfer pressure directly from concentrated brine to the seawater feed stream at up to 98% efficiency. Reduces specific energy consumption (SEC) to below 2.8 - 3.2 kWh/m³, delivering immense operational cost savings over continuous duty cycles.

  • Isobaric energy transfer rotor technology
  • Low thermal footprint ceramic bearings

Metallurgical Anti-Corrosion Standards

All wetted high-pressure piping, manifolds, and pump impellers are fabricated using Super Duplex Stainless Steel (2507 / UNS S32750) or high-grade SMO 254 with a Pitting Resistance Equivalent Number (PREN) > 42, mitigating localized crevice corrosion and pitting in hyper-saline conditions.

  • ASME Section IX qualified orbital TIG welding
  • Complete X-ray & hydrostatic leak testing

Smart Pretreatment & SDI Protection

Multi-barrier intake design matching Dissolved Air Flotation (DAF), automatic backwashing disc filtration, and pressurized Ultrafiltration (UF) skids. Consistently yields a Silt Density Index (SDI15) < 2.5, shielding thin-film composite polyamide membranes from biofouling and particulate shock.

  • Automated Chemically Enhanced Backwash (CEB)
  • Online streaming potential & turbidity sensors
Macro Solutions

Macro-Industry Deployment: Tailored Treatment Paradigms

Delivering high-reliability water transformation across municipal lifelines, heavy petrochemical complexes, and remote critical assets.

Island & Coastal Municipal Utilities

Providing centralized turn-key containerized desalination setups engineered inside standard 20ft/40ft High Cube insulated containers. Integrated remineralization (calcite filters) and pH adjustment ensure strict WHO Drinking Water Guidelines compliance.

  • Capacity: 50 m³/day to 10,000 m³/day modular blocks
  • Full climate control: anti-condensation HVAC

Oilfield & Offshore Exploration Assets

Severe-duty produced water and offshore platform drinking/injection systems. Incorporating specialized Disc Tube Reverse Osmosis (DTRO) capable of processing fluctuating total dissolved solids (TDS up to 120,000 mg/L) and eliminating residual hydrocarbons.

  • Compliant reinjection: Oil content ≤ 5 mg/L, SS ≤ 1 mg/L
  • Explosion-proof ATEX / IECEx certified skids

Heavy Chemical & High-Salinity ZLD

Coupling high-recovery sea water reverse osmosis with secondary electrodialysis or DTRO concentration followed by Mechanical Vapor Recompression (MVR) crystallization for industrial Zero Liquid Discharge mandates.

  • Brine concentration up to 180,000–220,000 μS/cm
  • Pure crystallized by-product recovery (NaCl / Na₂SO₄)
Smart Manufacturing

China Factory 4.0: Supply Chain Resilience & Precision Fabrication

Combining world-class component sourcing, automated robotic welding, and Shanghai's maritime export logistics for unparalleled cost-to-quality performance.

100% Pre-Shipment FAT Testing

Every SWRO and DTRO skid undergoes wet factory acceptance testing (FAT) with simulated hyper-saline feedwater. Flow rates, pressure stabilization, interlock safeties, and noise emission metrics are certified prior to port dispatch.

Tier-1 Component Integration

We source core components directly from leading global suppliers: Toray / DuPont FilmTec membranes, Danfoss / Grundfos high-pressure pumps, and Siemens / Schneider PLC hardware, ensuring reliable long-term service and global parts availability.

Rapid Delivery Lead Times

With standardized skid frames, automated laser-cutting sheet metal workshops, and pre-engineered modular piping systems, custom SWRO container production is compressed to 45–60 days, drastically reducing EPC schedule risk.

Global Compliance

Localized Engineering Support & Regulatory Compliance

Ensuring cross-border conformity with strict environmental, pressure safety, and digital validation standards across international jurisdictions.

International Pressure Safety

Full manufacturing compliance with European Pressure Equipment Directive (PED 2014/68/EU), CE Machinery Directives, and ASME Section VIII vessel standards. Electrical skids built to UL508A and IEC 60204-1 specifications for immediate operational commissioning.

Remote IIoT Telemetry & Cloud SCADA

Every system integrates secure cloud telemetric gateways enabling our Shanghai engineering center and client teams to monitor transmembrane pressure (TMP), normalized permeate flux, differential pressure (ΔP), and conductivity in real-time.

Full Lifecycle Validation & Consumables

Complete traceability portfolios provided: 3.1 material mill test certificates, welding logs, P&ID verification, CIP cleaning manuals, and direct factory-price consumable delivery (membrane elements, cartridge filters, antiscalants).

Future Innovations

R&D Roadmap: Next-Generation Desalination Technology

Shanghai Tongjie's ongoing commitment to sustainable, carbon-neutral desalination architectures and smart self-optimizing water plants.

Phase 1 • Active Deployment

Solar-Desalination Hybrid Microgrids

Direct coupling of variable-frequency high-pressure pumps with utility-scale Photovoltaic (PV) power systems. Advanced buffering logic accommodates solar fluctuations without dropping recovery rates or causing hydraulic water hammer.

Phase 2 • Pilot & Field Qualification

AI-Driven Autonomous CIP Optimization

Machine learning predictive fouling models that analyze real-time salt passage and feed osmotic pressure variations to trigger localized Clean-In-Place (CIP) sequences, prolonging membrane operational lifespans by up to 35%.

Phase 3 • Future Horizons

Graphene & Biomimetic Aquaporin Systems

Collaboration with top academic institutes on next-gen nanocomposite biomimetic membranes offering ultra-high water flux under significantly reduced hydraulic driving pressure, driving industry-wide SEC toward 1.8 kWh/m³.

Procurement Advisory

Global Enterprise Procurement Strategy: Buyer's Guide

Key technical parameters global EPCs, municipal utilities, and industrial buyers must evaluate before issuing a desalination tender.

Feedwater Characterization Checklist

Designing an optimal SWRO system requires comprehensive chemical analysis over seasonal cycles. Key parameters include:

  • Total Dissolved Solids (TDS), Electrical Conductivity (EC), and Boron content
  • Silt Density Index (SDI15), Turbidity (NTU), and Total Suspended Solids (TSS)
  • Seasonal Water Temperature range (influences design osmotic pressure)
  • Biological Oxygen Demand (BOD), Chemical Oxygen Demand (COD), and algae bloom risk

Total Cost of Ownership (TCO) Comparison

Evaluating long-term economic returns versus initial capital expenditure (CAPEX):

  • Energy Consumption: 40-50% of 20-year OPEX; ERD selection is critical
  • Pretreatment Rigor: Proper UF saves up to 40% in membrane replacement costs
  • Modular Standardization: Containerized systems lower on-site civil costs by over 60%
  • Direct Supplier Integration: Direct sourcing from Shanghai Tongjie reduces middleman markups
Specialized Membrane Systems

High-Pressure Concentration, Degassing & Recovery Solutions

Specialized separation skids for zero liquid discharge, produced water reinjection, deoxygenation, and pharmaceutical-grade purification.

ODM China Suppliers Factory: Advanced Fracturing Flowback Water Reuse Treatment Equipment for Oil & Gas Operations Suppliers, Manufacturers
ODM China Suppliers Factory: Advanced Fracturing Flowback Water Reuse Treatment Equipment for Oil & Gas Operations Suppliers, Manufacturers
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OEM Compact Reverse Osmosis Seawater Desalination System - China Suppliers & Factory for Freshwater Solutions Supplier, Manufacturer
OEM Compact Reverse Osmosis Seawater Desalination System - China Suppliers & Factory for Freshwater Solutions Supplier, Manufacturer
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Wholesale China Pharmaceutical Purified Water & WFI System Suppliers - High-Quality Factory Solutions for APIs Factories, Manufacturers
Wholesale China Pharmaceutical Purified Water & WFI System Suppliers - High-Quality Factory Solutions for APIs Factories, Manufacturers
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China China Suppliers Deoxygenation Membrane Equipment Factory for Efficient Physical Degassing of Water Factory, Supplier
China China Suppliers Deoxygenation Membrane Equipment Factory for Efficient Physical Degassing of Water Factory, Supplier
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Wholesale High-Pressure Membrane Concentration System in China - Top Suppliers & Factory for DTRO & STRO Technology Factory, Supplier
Wholesale High-Pressure Membrane Concentration System in China - Top Suppliers & Factory for DTRO & STRO Technology Factory, Supplier
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OEM High-Ratio Water Reuse Equipment from China Suppliers - Multi-Stage Process for Industrial Wastewater Treatment Factory Supplier, Manufacturers
OEM High-Ratio Water Reuse Equipment from China Suppliers - Multi-Stage Process for Industrial Wastewater Treatment Factory Supplier, Manufacturers
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Wholesale Modular Containerized Seawater Desalination Equipment from China Suppliers | Factory-Ready for Rapid Deployment Supplier, Manufacturer
Wholesale Modular Containerized Seawater Desalination Equipment from China Suppliers | Factory-Ready for Rapid Deployment Supplier, Manufacturer
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Engineering Q&A

Frequently Asked Questions: Industrial & Municipal SWRO

Expert insights addressing key inquiries from project managers, EPC engineering directors, and procurement teams worldwide.

What specific input data is required to engineer a custom wholesale Seawater RO System proposal?
To provide an accurate technical projection and equipment scope, we require: (1) A comprehensive water laboratory analysis including TDS, Electrical Conductivity, pH, temperature range, silica (SiO₂), calcium/magnesium hardness, iron, manganese, barium, and strontium; (2) Turbidity and Silt Density Index (SDI15); (3) Desired pure water output flow rate (m³/day or GPD) and application (potable, boiler feed, electronics rinse); (4) Discharge permit restrictions for brine; and (5) Site electrical constraints (Voltage, Frequency, Phase: e.g., 380V/480V 50/60Hz) and footprint availability (skid-mounted vs. CSC-plated High Cube shipping container).
How does Shanghai Tongjie achieve low specific energy consumption (SEC) in SWRO systems?
We integrate modern ceramic or high-alloy isobaric Energy Recovery Devices (such as rotary pressure exchangers) paired with high-efficiency variable frequency drive (VFD) multistage centrifugal high-pressure pumps. By recovering hydraulic energy from the high-pressure concentrate stream at efficiencies up to 98%, our systems operate at an SEC of approximately 2.8 to 3.4 kWh/m³, substantially reducing lifecycle operational costs compared to older Pelton-wheel or turbocharger designs.
What metallurgical materials are selected for high-pressure wetted parts?
To eliminate pitting corrosion in high-salinity marine environments (salinities between 35,000 to 45,000 mg/L TDS), all high-pressure piping, high-pressure pump casings, and valves are manufactured from Super Duplex Stainless Steel (2507 / UNS S32750) or 254 SMO (UNS S31254) with a Pitting Resistance Equivalent Number (PREN) exceeding 42. Low-pressure manifolds utilize schedule 80 PVC, CPVC, or 316L SS, while membrane housings feature ASME-certified FRP vessels rated for 1,000 to 1,200 PSI working pressure.
Can containerized SWRO units operate completely off-grid in remote coastal areas?
Yes. Our containerized systems are engineered for harsh, remote deployments including remote mines, offshore islands, and forward operating bases. Systems can be integrated with local solar PV arrays, wind turbines, and battery energy storage systems (BESS). The PLC control programming features automated ramp-up and soft-start technology that prevents current surges and adapts production rates dynamically to real-time renewable power availability.
What are the key differences between Spiral Wound SWRO and Disc Tube Reverse Osmosis (DTRO)?
Standard spiral-wound RO elements require feed water with low turbidity and SDI < 3.0, making them ideal for high-capacity municipal and industrial seawater desalination. DTRO (Disc Tube Reverse Osmosis) features an open-channel hydrodynamic design with disc-shaped cushions that tolerate extremely high suspended solids (turbidity > 100 NTU), COD up to thousands of mg/L, and high scaling potentials. DTRO is primarily deployed for oilfield fracturing flowback reuse, landfill leachate, and ultra-high-pressure brine concentration up to 120-160 bar.
What international quality certifications and technical documentation accompany every shipment?
Every shipment from Shanghai Tongjie includes ISO 9001, ISO 14001, and ISO 45001 certified documentation, CE Declaration of Conformity under the Machinery and Low Voltage Directives, ASME Section IX weld inspection reports, 3.1 material traceability mill certificates, complete electrical schematics, P&ID drawings, factory hydrostatic pressure test reports, and customized operations and maintenance (O&M) manuals.