Featured Systems
High-Capacity Industrial & Offshore Desalination Units
Pre-engineered, containerized, and skid-mounted seawater reverse osmosis solutions manufactured in our Shanghai center for global deployment.
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Industry Whitepaper Analysis
The Paradigm Shift in Seawater Membrane Desalination
From energy-intensive thermal plants to high-efficiency, multi-stage membrane separation: how modern engineering overcomes osmotic pressure challenges.
Specific Energy Consumption (< 2.8 kWh/m³)
By pairing isobaric Energy Recovery Devices (ERD) with advanced polyamide thin-film composite (TFC) membranes, modern SWRO architectures recover up to 96% of high-pressure concentrate kinetic energy, reducing net power consumption substantially.
Modular & Containerized Rapid Deployment
Remote island infrastructure and coastal heavy industry demand plug-and-play footprints. Factory-integrated 20ft and 40ft containerized SWRO units pre-plumbed with super duplex stainless steel (2507) and automated CIP systems minimize on-site civil works.
Boron & Bromide Rejection Compliance
Potable standards (WHO < 0.5 mg/L) and agricultural crop irrigation demand ultra-high boron rejection membranes operating efficiently across warm seawater feeds (25°C - 38°C) typical of Middle Eastern and Southeast Asian ocean waters.
Procurement Guide
Global Enterprise Sourcing Criteria for SWRO Plants
A comparative engineering evaluation matrix designed for EPC project managers, municipal water authorities, and industrial buyers.
| Evaluation Parameter | Standard Commercial Grade | Tongjie Engineered ODM Industrial Grade | Operational Impact & Lifecycle ROI |
|---|---|---|---|
| Metallurgy & Corrosion Resistance | AISI 304 / 316 Stainless Steel wetted parts | Super Duplex Stainless Steel (2507) & 1.4539 / Alloy 904L | Prevents chloride pitting and crevice corrosion under 65–80 bar pressure; extends equipment life past 15 years. |
| Pretreatment Architecture | Single-stage dual-media pressure filters | Automated DAF + Ultrafiltration (UF) hollow-fiber barrier | Silt Density Index (SDI15) held strictly < 2.5, eliminating irreversible organic bio-fouling during seasonal algal blooms. |
| Energy Recovery Device (ERD) | Turbochargers / Pelton wheel (~65–75% efficiency) | Isobaric Ceramic Pressure Exchanger (>96% efficiency) | Direct reduction of power consumption to 2.8–3.2 kWh/m³ for high-salinity marine feeds (TDS 35,000–45,000 ppm). |
| Factory Acceptance Testing (FAT) | Component-level static pressure tests | Full-system wet testing with simulated seawater at Shanghai factory | Guarantees zero on-site mechanical leaks, verified flux rates, and reduces field commissioning from months to ~15 days. |
| SCADA & PLC Automation | Basic relay control or semi-auto micro-controller | Siemens / Allen-Bradley PLC with cloud telemetry & auto-CIP | Enables unmanned operation, predictive anti-scaling dosing, and real-time remote diagnostics worldwide. |
Technical Engineering Scenarios
Macro Industry Solutions Across Global Application Environments
Engineered treatment trains designed to tackle demanding feed compositions, from hypersaline fracturing flowback to offshore platform potable supply.
Offshore & Remote Island Potable Supply
For municipal authorities and tourist resorts cut off from municipal infrastructure, Tongjie’s solar-ready containerized SWRO units operate reliably on raw seawater ranging from 32,000 to 45,000 mg/L TDS, outputting potable water meeting WHO guidelines with integrated remineralization calcite filters.
Oil & Gas Produced Water Reinjection
Combining primary hydrocyclone de-oiling, microfiltration, and high-pressure Disc Tube Reverse Osmosis (DTRO), our containerized skids handle shale gas fracturing return fluids, reducing oil content to ≤5 mg/L and suspended solids to ≤1 mg/L for sustainable subterranean reinjection.
High-Salinity Industrial ZLD Systems
Electroplating, coal chemical, and semiconductor processing centers deploy our high-pressure membrane concentration (HPRO) ahead of MVR (Mechanical Vapor Recompression) evaporators, condensing brine volume by up to 80% to lower subsequent thermal crystallization operational costs.
Global Compliance & Engineering
Engineering Compliance, Lifecycle Support & Technical Roadmap
Delivering turn-key peace of mind through strict international standards, verifiable quality assurance, and ongoing membrane R&D.
International Codes & Localized Engineering Support
Exporting industrial water systems requires seamless adherence to localized regulatory bodies. Shanghai Tongjie Environmental Protection Technology Co., Ltd. operates under certified ISO 9001 (Quality), ISO 14001 (Environmental), and ISO 45001 (Occupational Health & Safety) frameworks, along with full CE conformity markings for electrical and pressure vessel components.
For EPC contractors managing overseas installations in the Middle East (GCC), Latin America, and Southeast Asia, our factory prepares comprehensive documentation packs: P&ID schematics, 3D CAD step files, ASME IX weld qualification records, hydro-test certifications, and FAT verification protocols, streamlining regional commissioning and third-party inspections.
Class II Contracting Qualifications
Certified in Environmental Protection Engineering & Mechanical/Electrical Installation with over 38 invention and utility patents.
Technology Roadmap & Future Innovations
Next-Generation Graphene & Biomimetic Membranes
Integrating nano-composite materials to elevate water permeability by 25% while maintaining absolute monovalent salt rejection.
Ultra-High Pressure RO (UHPRO > 120 bar)
Pushing brine concentration boundaries to reach TDS levels exceeding 130,000 mg/L entirely through membrane mechanics, cutting thermal evaporator requirements in ZLD circuits.
AI-Powered Predictive Fouling Management
Edge-computed transmembrane pressure (TMP) analysis forecasting CIP chemical cleaning windows, cutting unscheduled plant downtime.
Expert Technical FAQ
Engineering Inquiries & Procurement Considerations
Key technical and commercial answers regarding customized SWRO plants, OEM skid manufacturing, and global operational terms.
What parameters are required to calculate an accurate SWRO membrane process projection?
To provide an engineered proposal and ROSA/WAVE projection, please submit a detailed raw water analysis containing: TDS, electrical conductivity, feed temperature seasonal range (min/max), pH, turbidity/SDI, hardness (Ca²⁺, Mg²⁺), silica (SiO₂), barium, strontium, and boron concentrations. Furthermore, indicate required permeate volume (m³/day), target permeate quality (e.g., WHO drinking water standards or boiler-feed conductivity), available utility power (voltage/frequency), and footprint preferences (skid-mounted or standard sea container).
How does Tongjie solve membrane fouling issues in high-turbidity coastal marine feeds?
Our multi-barrier pretreatment begins with automated self-cleaning disc or screen filtration followed by Coagulation-DAF (Dissolved Air Flotation) and pressurized hollow-fiber Ultrafiltration (UF) with a 0.02-micron pore barrier. This ensures a consistent Silt Density Index (SDI15 < 2.5) and eliminates colloidal silts, bacteria, and seasonal red tide algae prior to high-pressure seawater membrane introduction.
What is the realistic commissioning timeframe for your containerized seawater systems?
Because our containerized plants undergo mechanical, electrical, and hydraulic Factory Acceptance Testing (FAT) in Shanghai before shipping, site installation requires only connecting raw water suction lines, brine discharge manifolds, product water collection, and 3-phase power. Mechanical commissioning and fresh water delivery typically occur within 10 to 15 days upon container placement on site.
Do you manufacture custom private-label (ODM/OEM) systems for foreign engineering partners?
Yes. A primary pillar of Shanghai Tongjie's operations is providing ODM/OEM manufacturing for international EPC entities, equipment distributors, and municipal service contractors. We customize system layouts, frame structural materials (carbon steel epoxy-coated or 316L stainless steel), pump configurations, HMI interfaces in multiple languages, system tagging, and technical documentation with your branding.
How do your ZLD systems achieve economical brine concentration?
We utilize hybrid membrane-thermal architecture. Rather than routing raw high-salinity brine straight to high-CAPEX thermal evaporators, our specialized Disc Tube Reverse Osmosis (DTRO) and High-Pressure Reverse Osmosis (HPRO) modules pre-concentrate the brine up to 100,000–120,000 mg/L TDS under 90–120 bar pressure. This dewaters up to 75% of the liquid phase purely via electrical membrane power, drastically shrinking the size and energy cost of downstream crystallizers.
Core Equipment Catalog
Precision Water Treatment, Concentration & Separation Machinery
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