What information do you need to size a seawater RO or industrial water treatment system?

Send a recent raw water analysis (TDS, conductivity, hardness, silica, iron/manganese, SDI or turbidity, oil and suspended solids where relevant), feed water temperature range, required product water quality and daily capacity, target recovery, available power supply (voltage/frequency), site conditions and whether you prefer a skid or containerized layout. With this data our engineers prepare a process design, mass balance and equipment list.

How fast can a containerized seawater desalination plant start producing water?

Tongjie containerized seawater RO units are fully prefabricated, assembled and tested in our Shanghai factory before shipment. On arrival the unit only needs basic power, intake and product water connections, so commissioning is short and predictable, which suits emergency supply, remote islands, construction camps and decentralized permanent supply.

Can your oil and gas produced water system meet reinjection requirements?

Yes. The system combines oil removal, softening, disc tube reverse osmosis (DTRO) and concentration. Treated reinjection water reaches oil content of 5 mg/L or less and suspended solids of 1 mg/L or less, enabling zero-discharge reuse of fracturing flowback. The skid-mounted container design can be commissioned within about 15 days and supports unmanned operation with remote monitoring for sites such as the Middle East and Kazakhstan.

Do your pharmaceutical purified water systems support validation?

Our pharmaceutical water systems use pretreatment, precision filtration, RO and EDI, and are built to pharmaceutical engineering practice with online monitoring of conductivity, temperature and flow. Data is recorded and traceable, and documentation is prepared to support your validation and qualification activities.

Do you offer ODM/OEM water treatment equipment?

Yes. We supply ODM/OEM membrane systems for distributors, EPC contractors and equipment brands, including customized capacity, materials, control systems, container layouts, labeling and documentation.

Which certifications and qualifications does Tongjie hold?

Tongjie holds CE certification and ISO 9001, ISO 14001 and ISO 45001 management system certifications. The company is a National High-Tech Enterprise and Shanghai Specialized & Sophisticated Enterprise, holds Class II contracting qualifications in environmental protection engineering and in mechanical and electrical installation, and owns more than 38 invention and utility patents plus software copyrights.

OEM Simple Desalination Process Suppliers & Solutions

Decentralized, High-Efficiency Membrane & Thermal Engineering by Shanghai Tongjie. Accelerating Reliable Freshwater Conversion for Global Municipal, Oilfield, and Industrial Projects.

Direct OEM Catalog

High-Efficiency Modular Desalination Systems

Pre-assembled, factory-validated skids and container units optimized for swift overseas deployment.

China Suppliers of Containerized Seawater Desalination Plants

High-Efficiency Brine Concentration Systems

CE Certified High-Ratio Water Reuse Equipment

ODM OEM Environmental Water Treatment Solutions

OEM High-Ratio High-Salinity Wastewater Reuse

Wholesale Pharmaceutical Purified Water & WFI System

Fracturing Flowback Water Reuse Treatment System

OEM Fracturing Flowback Reuse for Oil & Gas Fields

Engineering Whitepaper Analysis

The Evolution of the "Simple Desalination Process" in Global Industry

Demystifying decentralized membrane separation, CAPEX/OPEX containment, and automated plug-and-play architecture for modern water governance.

Architectural Simplification

Traditional municipal desalination plants demand protracted civil infrastructure, specialized high-maintenance pre-treatment lagoons, and months of on-site tuning. The streamlined modern OEM process compresses this via skid-mounted integrated UF-SWRO (Ultrafiltration + Seawater Reverse Osmosis), standardizing operations down to push-button PLC automation.

Energy Recovery Optimization

The core challenge of "simple" desalination has historically been power usage. Modern isobaric Energy Recovery Devices (ERD) transfer hydraulic pressure directly from the concentrated reject brine to incoming feed water at up to 96% efficiency, dropping power consumption below 3.0 kWh/m³ for coastal operations.

Fouling Mitigation Protocols

Through automatic flushing regimes, turbidity-triggered air scouring, and chemically enhanced backwash cycles, modern simplified plants minimize membrane replacement frequency. This allows regional mining outposts, offshore rigs, and coastal resorts to operate continuously with minimal chemical intervention.

38+

Patented Innovations

≤2.8

kWh/m³ Energy Threshold

15 Days

Average Commissioning Speed

99.2%

Salt Rejection Integrity

Supply Chain Excellence

Why Tier-1 EPCs Partner with Chinese OEM Factories

Accelerated lead times, rigorous ISO/CE quality oversight, and complete integrated manufacturing ecosystems create unmatched total-cost-of-ownership (TCO) advantages.

Factory Integration (FAT)

Systems are 100% pre-piped, electrically wired, and wet-tested with real saline feeds inside Shanghai Tongjie's ISO-certified production floor prior to sea crating, eliminating costly on-site welding.

Lead Time Compression

By leveraging concentrated industrial clusters in the Yangtze River Delta for duplex stainless steel, pressure vessels, and control valves, delivery turnarounds are curtailed by 35% compared to Western counterparts.

Full CE & ISO Compliance

Every structural skid, pressure channel, and electronic manifold complies strictly with CE Directives, ISO 9001, ISO 14001, and ISO 45001 standards, backed by certified raw mill material tracing.

Full ODM/OEM Flexibility

Private-label skid frames, white-label HMI visual software, custom membrane branding, and tailored voltage architectures (380V/440V/480V at 50/60Hz) directly tailored to EPC tender requirements.

Process Dimension	Conventional Bespoke Desalination	Tongjie Simplified OEM Skid Solutions
Footprint & Portability	Permanent civil concrete footings; decentralized skid footprints	Standard 20ft/40ft High Cube Container; CSC certified for ocean shipping
On-site Civil Requirements	Extensive underground trenching, settling basins, chemical storage pits	Flat concrete pad, dual flanged feed/discharge piping, 3-phase grid/genset tie-in
Field Commissioning Time	60 to 120 days with complex commissioning teams	≤ 15 days; plug-and-play flange couplings with automated startup cycles
Operational Telemetry	Manual analog sampling and fragmented local panel monitoring	Cloud IoT SCADA with real-time TDS, SDI, temperature, and automated CIP triggers

Target Deployments

High-Stress Application Scenarios Across Global Geographies

Where resilient simplicity triumphs over excessive engineering complexity.

Island Resorts & Remote Municipalities

Islands in Southeast Asia, the Caribbean, and the Pacific rely on compact SWRO to eliminate barge water freight costs. Tongjie containerized plants run silently, produce potable WHO-standard drinking water, and resist extreme marine corrosion via Super Duplex 2507 alloys.

Oil & Gas Fracturing Flowback

High levels of suspended hydrocarbons and fluctuating TDS make conventional filtration fail. Our integrated disc-tube reverse osmosis (DTRO) and softening trains drop oil content to ≤5 mg/L and suspended solids to ≤1 mg/L, achieving reliable field reinjection in the Middle East and Central Asia.

High-Salinity Industrial ZLD Plants

Textile, chemical, and metal finishing facilities facing strict zero-liquid-discharge ordinances implement our combined UF + RO + MVR Evaporation systems, recovering over 95% of process effluent while precipitating dry, marketable crystalline salts.

Procurement Intelligence

Frequently Asked Questions: Sourcing & Engineering

Direct technical responses addressing engineering specifications, quality verification, and operating limits.

What specific input data does Tongjie require to quote and configure a simple desalination process?

To generate an accurate process proposal, mass balance simulation, and equipment scope, we require: a complete raw water chemical analysis (including TDS, silica, total hardness, turbidity/SDI, barium/strontium, and oil content if dealing with flowback), target permeate capacity (m³/day), minimum permeate quality standards (potable, boiler feed, or ultrapure), ambient operational temperatures, and site electrical voltage/frequency specifications.

How does the "simple" desalination design reduce long-term operational maintenance?

Simplicity is achieved through robust automation rather than cutting technical corners. Our plants utilize fully automated pre-treatment backwash stages, anti-scalant chemical dosing regulated by incoming flow metrics, and automated low-pressure permeate flushes during shutdowns. This keeps membranes free from inorganic salt scaling and biofouling without requiring constant on-site chemist supervision.

What metallurgical protections prevent premature pitting corrosion in coastal seawater applications?

All high-pressure piping manifolds, high-pressure pump wet ends, and brine discharge regulators are constructed from Super Duplex Stainless Steel (2507 / UNS S32750) or Duplex 2205, boasting PREN (Pitting Resistance Equivalent Number) values greater than 42. Low-pressure feeds utilize schedule 80 UPVC or specialized fiber-reinforced plastic (FRP).

Can Tongjie provide custom ODM white-label systems for international engineering contractors?

Yes. Shanghai Tongjie works extensively with international EPC contractors, distribution partners, and system integrators. We support full custom chassis painting, private branding, bilingual SCADA/HMI interfaces, custom-tailored container layouts, and complete documentation packages structured to support client validation and end-user submittals.

How are Factory Acceptance Tests (FAT) conducted for international buyers before ocean transport?

Prior to crating, all systems undergo a rigorous 48-to-72 hour continuous hydrostatic and functional trial at our Shanghai factory. We inspect electrical load balances, verify safety relief valves, test interlock loops, calibrate online conductivity/flow sensors, and provide high-definition live video feeds and complete signed inspection reports to the buyer's quality audit team.

Complete System Catalog