Seamoretech raises €1.1M to turn desalination brine into minerals

Seamoretech, a Porto-based CleanTech startup, has secured €1.1 million in the first closing of its Seed round. The company converts brine, the concentrated waste left over from desalination, into freshwater and critical minerals.

The round drew participation from Rypples, 7Seas Capital and Crédito Agrícola. According to the announcement, the investors bring experience in the OceanTech and ClimateTech sectors. The startup is female-led.

Why brine matters

Desalination plants produce drinking and industrial water from seawater, but they also generate large volumes of highly concentrated brine that usually has to be discharged or treated. Seamoretech's approach treats that stream as a resource rather than waste, recovering additional freshwater and extracting minerals classed as critical.

For operators, this could mean higher water recovery from the same intake and a potential new revenue line from minerals, while reducing the amount of brine returned to the environment. The company has not disclosed technical specifications or customers in the material available.

What comes next

The funding is described as a first closing, which means the Seed round is not yet complete. Further details on the final round size, the use of proceeds and deployment plans have not been provided.

The deal adds to growing investor interest in technologies that address water scarcity and the supply of raw materials at the same time, two pressures that increasingly overlap in coastal and arid regions.