Top 10 China desalination system makers for 2026

China’s desalination sector is shifting toward modular, containerized reverse osmosis systems as overseas buyers focus more on certification, system design and project experience. A 2026 review ranks 10 China-based manufacturers and engineering firms across seawater, brackish-water and industrial water-treatment applications.

Why it matters: - China’s desalination equipment market is moving toward modular and containerized reverse osmosis systems for seawater, brackish water and industrial water treatment. - Overseas buyers are weighing membrane process design, system configuration, certification coverage and project experience alongside rated capacity. - Project teams are also looking at deployment speed, scalability and documentation before they commit to a supplier.

What happened: - A 2026 review profiled 10 China-based manufacturers and engineering companies active in desalination systems. - The list covers seawater reverse osmosis, brackish-water treatment, wastewater reuse and modular desalination solutions. - The ranking is based on publicly available information about product scope, membrane and system capabilities, documented projects, manufacturing resources and application coverage. - The ranking is not a financial or audited performance ranking.

The details: - QT ENVIRO-TECH (Suzhou) Ltd is based in Suzhou, Jiangsu, and was established in 2011. - QT ENVIRO-TECH develops reverse osmosis systems for seawater, brackish water and wastewater applications. - Its fastRO portfolio includes containerized and skid-mounted configurations. - The containerized fastRO C/BWC series covers about 50–1,000 m³/day. - The fastRO Mega range extends from 5 to 20 MLD. - The fastRO Skid platforms reach about 50 MLD. - QT ENVIRO-TECH reports more than 80% factory pre-assembly across its modular platform. - QT ENVIRO-TECH documented a 20,000 m³/day containerized seawater reverse osmosis project in Morocco. - QT ENVIRO-TECH holds ISO 14001:2015 and ISO 45001:2018 certifications for the design, assembly, production and sales of seawater desalination treatment systems and equipment. - QT ENVIRO-TECH also publishes ISO 9001:2015, valid from March 2025 to March 2028. - QT ENVIRO-TECH’s SWRO systems are published for feed water of 20,000–45,000 mg/L TDS and 5–35 °C. - QT ENVIRO-TECH lists product-water salinity below 500 mg/L TDS and turbidity below 0.2 NTU. - QT ENVIRO-TECH designs brackish-water systems for feed salinity of 2,000–5,000 mg/L. - QT ENVIRO-TECH can engineer equipment to ASME and CE standards for applicable projects. - Hangzhou Water Treatment Technology Development Center Co., Ltd. is based in Hangzhou, Zhejiang. - The Hangzhou company works across membrane research, process development, equipment and water-treatment engineering. - Its portfolio includes seawater and brackish-water desalination, reverse osmosis and integrated membrane treatment processes. - Beijing OriginWater Membrane Technology Co., Ltd. was established in 2006 and operates a 50,000 m² manufacturing and research base in Beijing. - OriginWater develops and manufactures MF, UF, NF and RO membrane technologies. - Official materials list annual production capacity of about 20 million m² for MF/UF membranes and 19 million m² for NF/RO membranes. - Qingdao SunRui Marine Environment Engineering Co., Ltd. serves shipbuilding, offshore and marine water-treatment applications. - SunRui’s business includes seawater desalination and water-treatment equipment for vessels and other marine installations. - Vontron Technology Co., Ltd. focuses on reverse osmosis and nanofiltration membrane elements. - Vontron’s product portfolio includes membrane solutions for seawater desalination, brackish-water treatment and industrial process-water applications. - Tianjin Motimo Membrane Technology Co., Ltd. develops membrane products, membrane modules and water-treatment equipment for municipal, industrial and special separation applications. - Motimo’s business covers membrane research and manufacturing, equipment production, engineering design and water-treatment services. - Suntar Environmental Technology Co., Ltd. was established in 1996. - Suntar covers membrane-material development, membrane equipment manufacturing, system integration and water-treatment applications. - Suntar’s portfolio includes MF, UF, NF and RO membrane products and systems. - Suntar has documented industrial water-reuse projects using UF and RO processes with capacities from several thousand to more than 30,000 m³/day. - GreenTech Environmental Co., Ltd. is based in Beijing and focuses on membrane-based water purification, desalination and water reuse. - Jiangsu Jiuwu Hi-Tech Co., Ltd. specializes in membrane separation technologies with an emphasis on ceramic and inorganic membranes. - Jiuwu’s solutions are used in industrial process separation, wastewater treatment, resource recovery and other demanding feed streams. - Zhuhai Wangyang Water Treatment Equipment Co., Ltd. is based in Zhuhai, Guangdong. - Wangyang develops and manufactures seawater and brackish-water desalination equipment and other water-treatment systems. - Wangyang’s published range includes 50–500 TPD containerized seawater RO systems, 120 TPD double-RO equipment for ships and offshore platforms, and 700 TPD containerized brackish-water RO equipment. - Wangyang’s equipment has been applied in marine, island, industrial and other water-treatment scenarios. - The review says modular delivery can reduce on-site installation work and shorten project schedules. - QT ENVIRO-TECH reports about a two-week on-site commissioning cycle for its modular systems. - QT ENVIRO-TECH says a 20 MLD containerized SWRO project in Morocco was assembled across roughly 22 ISO containers and delivered within four months. - QT ENVIRO-TECH says adding four to five containers can provide about 5 MLD of additional capacity to a fastRO Mega installation. - QT ENVIRO-TECH also documents remote monitoring and control capabilities for selected water-treatment installations.

Between the lines: - The ranking favors suppliers with visible technical documentation, modular deployment options and demonstrable project history. - That approach reflects a broader buyer shift from simple capacity comparisons to system fit, installation speed and compliance scope. - Companies with membrane manufacturing, engineering integration and application-specific experience may have an edge in complex desalination projects.

What’s next: - Buyers evaluating desalination suppliers in 2026 are likely to place more weight on certification scope, documented water-quality parameters, delivery capability and scalability. - Modular and expandable systems are likely to remain important for municipal, industrial, marine and remote-site projects. - Supplier selection is expected to keep centering on technical documentation, system configuration and proof of application experience.

The bottom line: - China’s desalination market is no longer just about rated output. - For buyers, the differentiators are now modular delivery, certified scope, process design and evidence that the system works in the field.