Tongjie membrane water treatment system engineering project
Industrial reverse osmosis water treatment equipment by Tongjie
Tongjie wastewater treatment and zero liquid discharge solution
Shanghai, China · Since 2010

Seawater Desalination, Industrial Pure Water & ZLD Systems Engineered for Global Projects

Shanghai Tongjie Environmental Protection Technology Co., Ltd. is a membrane-technology manufacturer that keeps R&D, process design, fabrication, installation, commissioning and operation support under one roof. We build containerized seawater RO plants, RO/EDI purified water, water reuse, high-salinity wastewater ZLD and oil & gas produced water systems for EPC contractors, industrial plants and utilities that need predictable water quality, not just equipment.

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Product Lines

Membrane Water Treatment Systems Built Around Your Feed Water

Every system starts with your raw water analysis. Hover to inspect each unit, then tap “View Process Train” to see the treatment stages inside — the same logic our engineers use when sizing membranes, pumps and controls for your project.

Containerized SWRO Containerized seawater reverse osmosis desalination system

Seawater Desalination System

A complete high-efficiency reverse osmosis plant integrated into a standard shipping container. Fully prefabricated, assembled and tested in our factory, it needs only basic power and water connections on site — ready for water production almost on arrival. Ideal for emergency supply, islands, remote camps and decentralized permanent supply.

  • Plug-and-play container
  • Factory FAT
  • Emergency & remote sites
Seawater RO Series
RO + EDI Pharmaceutical grade RO EDI purified water system

Industrial & Pharmaceutical Purified Water

Built for formulation workshops, API lines and high-purity industrial users. A proven train of pretreatment, precision filtration, RO and EDI delivers stable purified water, while online monitoring of conductivity, temperature and flow keeps every batch controllable, monitorable and verifiable.

  • Real-time water quality data
  • Traceable records
  • Validation support
Purified Water Series
Near-Zero Discharge High salinity wastewater ZLD evaporation and crystallization system

High-Salinity Wastewater & ZLD System

Advanced evaporation and crystallization technology reduces high-salinity wastewater volume dramatically and cuts disposal cost. Designed for chemical, pharmaceutical and electroplating plants, it runs fully automatically with low energy use and a compact footprint, helping you meet discharge permits and move toward green production.

  • Evaporation + crystallization
  • Compact footprint
  • Fully automatic
ZLD Series
Skid-Mounted DTRO Oil and gas field produced water treatment skid with DTRO

Oil & Gas Produced Water Treatment

Oil removal, softening, disc tube reverse osmosis (DTRO) and concentration combined in a skid-mounted container unit. Reinjection water reaches ≤5 mg/L oil and ≤1 mg/L suspended solids, enabling zero-discharge reuse of fracturing flowback. Commissioning in about 15 days, with unmanned operation and remote monitoring for harsh climates such as the Middle East and Kazakhstan.

  • Oil ≤ 5 mg/L
  • SS ≤ 1 mg/L
  • ~15-day commissioning
Produced Water Series

Water Reuse

Membrane-based recovery of municipal and industrial effluent for cooling tower make-up, boiler feed and process water.

ODM/OEM

Private-label skids and containers for distributors and EPC partners — custom capacity, materials, controls and documentation.

Hot Products

The configurations overseas buyers request most often, with standardized designs for faster lead times.
Application Industries

Industries We Serve With Proven Process Trains

Water challenges differ by sector: boron and energy in desalination, resistivity in semiconductors, traceability in pharma, salt balance in ZLD. Our designs are matched to the compliance target of each industry.

Industrial wastewater treatment and ZLD plant
01

Wastewater & ZLD

Volume reduction and zero liquid discharge for chemical, coal-chemical, pharmaceutical and electroplating effluent.

 Ultrapure water for semiconductor manufacturing
02

Semiconductor

RO/EDI ultrapure water trains for wafer rinsing and electronics production.

 Municipal wastewater resource recovery facility
03

Municipal Resource Recovery

Reclaiming treated municipal effluent as a reliable alternative water source.

 Pharmaceutical purified water system installation
04

Pharmaceutical

Purified water with online monitoring and traceable records for formulation and API lines.

 Process water treatment for food and beverage industry
05

Food & Beverage

Consistent process and product water for beverage, dairy and food processing plants.

 Seawater desalination plant for coastal water supply
06

Seawater Desalination

Potable and industrial water for islands, ports, resorts, mines and coastal industry.
Tongjie water treatment equipment manufacturing facility in Shanghai
Company Profile

A Membrane Engineering Company Built on Delivered Projects

Shanghai Tongjie Environmental Protection Technology Co., Ltd., founded in 2010, is a National High-Tech Enterprise and a Shanghai Specialized & Sophisticated Enterprise. We specialize in membrane applications and integrate R&D, process design, manufacturing, engineering and operation services — so the team that sizes your system is the same team that builds, tests and commissions it.

Our work spans seawater desalination, industrial pure water, water reuse, high-salinity wastewater and zero liquid discharge, and oilfield produced water, serving municipal, energy and industrial clients.

  • Class II Environmental Protection Engineering contractor
  • Class II Mechanical & Electrical Installation contractor
  • Invention & utility patents, software copyrights
  • ISO 9001 / 14001 / 45001 & CE certified
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Cooperative Partners

Project Delivery

How We Deliver Your Water Treatment Project — Step by Step

Overseas buyers tell us the biggest risk is uncertainty after the order. This is the delivery path we follow on every project, with documents you can review at each gate.

  1. 01

    Water Analysis & Duty Definition

    We review your raw water report, capacity, product water spec and site utilities to define the design basis.

  2. 02

    Process Design & Proposal

    Membrane projections, mass balance, P&ID, layout and power estimate — shared before you commit.

  3. 03

    Fabrication & Factory Test

    Skids or containers are built in Shanghai and functionally tested before shipment to reduce site risk.

  4. 04

    Installation & Commissioning

    On-site or remote-guided start-up, operator training and handover of O&M manuals.

  5. 05

    Lifecycle Support

    Remote monitoring, spare parts and membrane replacement through our Global Service network.

Compliance & Quality

Certifications That Back Every Shipment

Third-party certified management systems for quality, environment and occupational safety, plus CE conformity for export markets. Click any certificate to view it full size.

CE Certificate

EU conformity for export equipment

ISO 9001

Quality management system

ISO 14001

Environmental management system

ISO 45001

Occupational health & safety

Our Clients

Trusted by Industrial Owners, EPCs & Utilities

Long-term relationships with enterprises across energy, chemical, pharmaceutical and municipal sectors — many of them repeat buyers.

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News & Blogs

Engineering Insights & Project News

Field notes from our engineers on modular desalination, off-grid operation and recent industrial deliveries.

Browse the Hot Blog
Buyer FAQ

Specifying a Water Treatment System From Overseas

Straight answers to the questions EPC contractors and plant engineers ask us before requesting a proposal.

Ask Our Engineers

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, plus oil and suspended solids where relevant), the feed 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?
Our 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 — well suited to emergency supply, islands, construction camps and decentralized permanent supply. See the Seawater Desalination System range.

Can your oil & 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 ≤5 mg/L oil and ≤1 mg/L suspended solids, enabling zero-discharge reuse of fracturing flowback. The skid-mounted container can be commissioned in about 15 days and supports unmanned operation with remote monitoring in harsh environments 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, 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. Learn more under Industrial Purified Water.

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 of construction, control systems, container layouts, labeling and documentation.

Which certifications and qualifications does Tongjie hold?
CE certification and ISO 9001, ISO 14001 and ISO 45001 management systems. Tongjie 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 38+ invention and utility patents plus software copyrights.
Start Your Project

Send Your Water Analysis. Get an Engineered Proposal.

Share your feed water data, capacity and site conditions — our engineers will return a process recommendation and equipment scope tailored to your project, not a generic brochure.

Contact Us Request a Catalog
[email protected] WhatsApp: +86 136 7199 9290
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