SEALEAU BV

Their core work

SEALEAU BV is a Dutch technology SME specializing in mineral and resource recovery from brine streams — the concentrated waste left over from desalination and industrial water treatment. They develop separation, concentration, and crystallization technologies that turn brine waste into valuable products like salts, magnesium, trace metals, and recovered water. Based in Delft, they operate at the intersection of water technology and circular economy, helping industries and municipalities close the loop on wastewater by extracting economic value from what was previously a disposal problem.

What they specialise in

How they've shifted over time

SEALEAU's early work (2017-2018) focused on the fundamentals of brine treatment — recovering water, minerals, and salt from industrial brine effluents, with an emphasis on industrial symbiosis and closing material loops (ZERO BRINE, BRINE MINING). By 2020, their focus expanded significantly toward desalination brines, critical raw materials, and trace metals recovery (SEA4VALUE, WATER-MINING), reflecting growing EU concern over raw material dependency. The trajectory shows a clear move from industrial wastewater treatment toward strategic resource extraction from desalination plants — a larger and more commercially significant market.

SEALEAU is moving toward large-scale desalination brine mining for critical raw materials — positioning them for growing demand as Europe scales up desalination and seeks to reduce dependency on imported minerals.

How they like to work

SEALEAU operates primarily as a specialist participant in large consortia (3 of 4 projects), contributing their brine technology expertise to broader multi-partner initiatives. With 71 unique partners across 18 countries from just 4 projects, they join ambitious, large-scale demonstration projects rather than small research teams. They coordinated one smaller project (BRINE MINING, a CSA/SME instrument), suggesting they can lead focused efforts but prefer to embed their technology within larger collaborative demonstrations.

Extensive network of 71 partners across 18 countries built through participation in large demonstration consortia. Their reach spans most of Europe, with particular strength in water-stressed Mediterranean countries where desalination and brine management are pressing concerns.

What sets them apart

SEALEAU occupies a rare niche: a technology SME focused entirely on turning brine waste into valuable resources. While many water technology companies handle desalination or wastewater treatment, SEALEAU specializes in the neglected output side — the concentrated brine that most operators treat as waste. This positions them as a go-to partner for any consortium dealing with desalination, industrial water treatment, or critical raw materials recovery from aqueous streams.

Highlights from their portfolio

• ZERO BRINE
  Largest single grant (EUR 602K) and the foundational project that established SEALEAU's core brine-to-value proposition with industrial symbiosis integration.
• SEA4VALUE
  Targets the strategically important challenge of recovering minerals and metals from seawater desalination brines, directly addressing EU raw material dependency.
• BRINE MINING
  SEALEAU's only coordinator role — an SME instrument project that validated their business model for circular economy solutions in industrial wastewater.