ODM High-Pressure Membrane Concentration System for High-Salinity Wastewater | China Suppliers & Factory
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⚙️ High-Performance Membrane Units
Factory-Engineered Water Conversion Systems
Explore turnkey skids, containerized SWRO units, and advanced membrane systems engineered by Shanghai Tongjie.
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🌐 Macro Market Dynamics
Global Enterprise Demand: Converting Saltwater into Scalable Freshwater
Strategic water security is no longer an ecological buzzword—it is an operational survival imperative across multi-national industries experiencing acute hydrological stress.
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Severe Water Scarcity & Arid Zones
Over 2.4 billion people and countless industrial hubs reside in water-stressed territories. From the coastal Gulf regions of Saudi Arabia and the UAE to mining corridors in Chile and Western Australia, hyper-arid climates mandate dependable desalination infrastructure independent of municipal water grids.
Key driver: Decentralized, high-recovery SWRO infrastructure.⚡
Thermal & Green Energy Production
Modern power generation, hydrogen electrolysis, and carbon capture initiatives require millions of cubic meters of demineralized feed water daily. Converting raw seawater to ultra-pure boiler feed (<1 µS/cm conductivity) protects billion-dollar turbine and electrolyzer assets from silica and salt scaling.
Standard: Dual-pass SWRO + EDI polishers.🏗️
Industrial Resilience & Remote EPC Projects
Offshore oil platforms, island resorts, marine ports, and remote semiconductor fabrication plants face astronomical water transport costs. On-site modular desalination plants decrease operational expenses by up to 74% compared to marine barge deliveries.
Solution: Plug-and-play ISO containerized plants.99.7%
Salt Rejection Efficiency
≤ 2.8 kWh
Energy Per m³ (w/ ERI)
38+
Patents & IP Certifications
15 Days
Rapid On-site Commissioning
🔬 Technical Whitepaper
Engineering Architecture: How Our ODM Factory Separates Pure H₂O
Shanghai Tongjie integrates advanced multi-barrier membrane technologies and energy recovery devices (ERD) to maximize recovery while minimizing operating expenditure.
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Stage 1: Multi-Barrier Pretreatment & Bio-Fouling Control
Raw seawater contains massive quantities of suspended colloids, marine organisms, and dissolved silica. Our turnkey plants feature automated DAF (Dissolved Air Flotation) paired with pressurized Ultrafiltration (UF) hollow fiber barriers (0.02 µm pore size). This maintains a Silt Density Index (SDI₁₅) below 2.5, shielding thin-film composite reverse osmosis membranes from biological irreversible fouling.
Automated dosing trains provide bisulfite dechlorination, scale inhibition, and biocide shock dosing modulated via smart PLC flow controls.
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Stage 2: High-Pressure SWRO & Isobaric Energy Recovery
Utilizing high-pressure multi-stage duplex stainless steel pumps (producing operating pressures up to 83 bar), seawater overcomes natural osmotic gradients. Permeate passes through spiral-wound polyamide composite membranes with boron-rejection profiles exceeding 93%.
Energy consumption is radically reduced through Isobaric Energy Recovery Devices (ERI / PX), capturing up to 96% of the hydraulic pressure energy from the concentrated brine reject, dropping net power consumption below 3.0 kWh per cubic meter of clean water produced.
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Stage 3: Post-Treatment, Remineralization & Conditioning
Permeate emerging from primary reverse osmosis is acidic (pH 5.8-6.5) and low in critical minerals. Our post-treatment trains utilize calcite contactors, dolomite limestone beds, and carbon dioxide dosing to normalize calcium hardness (50-80 mg/L as CaCO₃) and balance the Langelier Saturation Index (LSI).
Final disinfection combines low-pressure amalgam UV reactors with residual sodium hypochlorite chlorination to guarantee complete biological security in municipal storage tanks.
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Stage 4: Zero Liquid Discharge (ZLD) & Brine Extraction
For environmentally sensitive coastal waters or landlocked industrial sites, discharge of high-salinity brine is forbidden. Tongjie’s patented DTRO (Disc Tube Reverse Osmosis) and MVR (Mechanical Vapor Recompression) systems further concentrate brine up to saturation (>180,000 ppm TDS), routing the final slurry into automatic crystallization units.
The resulting byproduct is dry, saleable industrial salt crystals alongside 98.5% total freshwater recovery.
| Performance Parameter | Tongjie ODM SWRO Plant | Conventional SWRO | Thermal Desalination (MED/MSF) |
|---|---|---|---|
| Specific Energy Consumption | 2.7 - 3.2 kWh/m³ | 4.5 - 6.0 kWh/m³ | 12 - 18 kWh-eq/m³ |
| Pretreatment SDI Reliability | SDI < 2.0 (Integrated UF) | SDI 3.5 - 5.0 (Sand Media) | High Chemical Coagulation |
| Footprint / Modularity | Standard ISO Containerized Skid | Large Concrete Civil Footprint | Massive Heavy Industry Footprint |
| Total Recovery Efficiency | 45% - 55% (Single Pass) | 35% - 40% | 15% - 25% |
| Automation & SCADA | Full Unmanned IoT / Remote Diagnostic | Manual / Semi-Automatic | Continuous Operator Supervision |
🚀 Innovation Horizon
Technology Roadmap: The Future of Desalination Engineering
Continuous R&D at our Shanghai headquarters drives the next generation of intelligent, carbon-neutral saltwater processing plants.
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AI Predictive Membrane Analytics
Our proprietary neural algorithms evaluate real-time differential pressure, temperature fluctuations, and feed conductivity to anticipate organic scaling and mineral precipitation up to 120 hours before flux degradation occurs, auto-triggering clean-in-place (CIP) regimens.
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Off-Grid Direct Solar & Wind Hybrids
Addressing erratic green power feeds, our variable-frequency high-pressure systems synchronize directly with DC microgrids and wind farms. Dynamic ramping control allows the plant to fluctuate output continuously between 40% and 100% capacity without membrane compaction.
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Graphene & Biomimetic Aquaporin Membranes
Partnering with top scientific institutions, Tongjie tests next-generation biomimetic hollow fiber membranes capable of doubling water permeability while rejecting monovalent chloride ions under 35% lower operating pressures.
🏆 Manufacturing Rigor
Global Compliance, Certification & Turnkey ODM Services
From metallurgical selection to electrical code harmonization, Tongjie guarantees complete export readiness for tier-1 engineering contracts.
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International Codes & Certified Manufacturing
Tongjie holds CE conformity, ISO 9001, ISO 14001, and ISO 45001 accreditations. Skid structures and pressure manifolds are built according to ASME Section VIII and ASME B31.3 piping regulations. High-pressure wet materials utilize Super Duplex Stainless Steel (UNS S32750 / 2507) and SMO 254 to prevent pitting and crevice corrosion under hot seawater environments (PREN > 42).
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Localized Field Support & Remote Operations
Our overseas service framework spans Central Asia, the Middle East, Southeast Asia, and Latin America. We provide complete Factory Acceptance Testing (FAT), Site Acceptance Testing (SAT), bilingual English/Chinese SCADA documentation, complete IQ/OQ validation protocols, and rapid emergency spare parts delivery (pumps, membranes, seals).
❓ Technical Q&A
Procurement & Engineering FAQ
Key technical answers for engineering firms, EPC buyers, and facility managers looking to procure industrial-scale saltwater conversion units.
What water analysis metrics are strictly necessary for sizing an ODM SWRO plant?
To accurately generate a reverse osmosis projection and process design, our engineers require: Total Dissolved Solids (TDS), operating conductivity, seasonal water temperature swings, chloride concentration, pH, total hardness (Ca²⁺, Mg²⁺), barium, strontium, silica (SiO₂), iron, manganese, oil & grease content, and Turbidity or Silt Density Index (SDI). If seawater is collected from shallow or open ocean intakes, TOC and algae bloom history should also be provided.
How does Tongjie control energy consumption during desalination?
We employ state-of-the-art Isobaric Energy Recovery Devices (such as ERI PX pressure exchangers) that transfer the residual hydraulic energy of high-pressure concentrate directly to fresh incoming seawater with up to 96% energy transfer efficiency. Combined with variable-frequency drive (VFD) motors and ultra-low energy thin-film composite membranes, overall power draw is reduced to 2.7 - 3.2 kWh per cubic meter of clean water.
Can Tongjie build plug-and-play containerized desalination plants for harsh environments?
Yes. Our containerized systems are engineered inside heavy-duty 20-foot and 40-foot standard ISO shipping containers, insulated with polyurethane wall panels, equipped with industrial air conditioning/heating, non-slip marine flooring, explosion-proof electrical enclosures, and internal lighting. All inter-skid piping, electrical wiring, and hydraulic systems are 100% pre-installed and wet-tested in Shanghai prior to international dispatch.
What metallurgy is utilized to prevent marine saltwater corrosion?
For all low-pressure raw water intake and UF loops, we employ high-grade UPVC, CPVC, or FRP (Fiberglass Reinforced Plastic). For all high-pressure circuits (post-high-pressure pump through RO vessel racks and brine discharge lines), we exclusively use Super Duplex Stainless Steel 2507 (1.4410) or Duplex 2205 with strict Pitting Resistance Equivalent Number (PREN > 42) to eradicate chloride stress-cracking corrosion.
What is the lead time and procedure for custom ODM projects?
A standard ODM turnaround spans 4 to 8 weeks depending on daily capacity and container customization requirements. The process follows 5 structured gates: (1) Feed water audit and membrane simulation, (2) P&ID and 3D skid layout approval, (3) Skid frame welding, piping assembly, and electrical wiring, (4) In-factory FAT wet testing under simulated salinity, and (5) Export packaging, sea freight, and optional on-site engineer commissioning.
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