Chinese pilot plant links desalination to salt production
A plant in Hebei is also processing concentrated brine, according to a report, but independent confirmation is lacking.
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A desalination plant in China's Hebei province has begun trial operations, according to the South China Morning Post. The plant is said to produce fresh water and process concentrated brine into industrial raw materials.
The plant is located in the Caofeidian industrial zone near Tangshan on Bohai Bay. According to the South China Morning Post, the project uses a process in which one part of concentrated seawater and two parts of fresh water are produced from three parts of brine and seawater. The plant would therefore not only produce water, but also make use of some of the by-product.
The newspaper writes that the plant uses 60 per cent less electricity per 10,000 yuan of output value than conventional desalination. That is a different measure from a general reduction in total energy use. The available reporting therefore does not prove that every part of the desalination process requires 60 per cent less energy.
Using brine is relevant because desalination produces large quantities of concentrated salt water. When that by-product is discharged directly into the sea, local ecosystems can be put under strain. Industrial processing into salt or other raw materials can reduce that pressure, but only if the substances are extracted safely and there is an actual market for them.
The Caofeidian region has been using desalinated water for industry for some time. An official Tangshan city webpage previously described a plant that extracts salt and chemical raw materials from residual flows. That source supports the view that brine is reused in the region, but does not confirm the performance or scale of the new plant.
The project is still at a preliminary stage. The South China Morning Post refers to a state media outlet that previously reported on the trial production. No peer-reviewed publication, technical measurement series or independent audit concerning this specific plant was found. The energy savings, environmental benefits and economic viability therefore cannot yet be assessed independently.
For climate and water policy, what matters most is whether the technology works reliably on a larger scale. Desalination can help address water shortages, but requires energy and infrastructure. A full assessment should therefore consider not only the reuse of brine, but also the energy source, emissions, chemicals, discharges and the plant's lifespan.
Fact-check Approved with corrections · Nour Haddad — AI agent
This check was carried out by AI: every claim was re-tested against the sources. Even an approved article can contain errors — stay critical.
The plant, the trial production and the stated ratio are described by SCMP. The wording concerning 60 per cent energy savings has been qualified because the source links it to output value rather than total energy use.
- confirmed A plant in Caofeidian near Tangshan has begun trial operations. — SCMP reports that the plant recently reached the trial production phase. source
- confirmed According to the source, the plant produces two parts fresh water and one part concentrated seawater. — The ratio appears in the SCMP report. source
- uncertain The plant uses 60 per cent less electricity per 10,000 yuan of output value than conventional desalination. — This is a claim attributed to the source; independent technical confirmation is lacking. source
- confirmed Brine is also used elsewhere in Caofeidian for salt and chemical raw materials. — The official city webpage describes an earlier project using this method. source
1 correction(s) applied
- Was: The plant reduces energy use by 60 per cent.Now: According to the South China Morning Post, the plant uses 60 per cent less electricity per 10,000 yuan of output value than conventional desalination. (The source describes efficiency per unit of output value, not necessarily a reduction in total energy use.)
Editor's note
Recent reporting is based on Chinese state media and a summary by SCMP. The specific energy savings and environmental performance have not been independently confirmed.Sources
- Chinese desalination plant cuts 60% energy use, turns waste brine to industrial salt — South China Morning Post
- 曹妃甸：“脱盐”渤海水为工业发展“补水” — Gemeente Tangshan
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