Our technology
ZosteraGrids are modular structures designed to restore the natural balance of aquatic environments. By stabilizing sediments and creating natural reactions, they reduce greenhouse gas emissions from the seabed and improve water clarity.
The planted eelgrass releases oxygen, creating healthier conditions that allow fish, plants, and other wildlife to return and ecosystems to recover and thrive.
Each grid also provides real-time data to monitor ecosystem recovery and greenhouse gas reduction, ensuring a transparent and measurable impact.
Our interesting results
Habitat restoration
Greenhouse gases emissions reduction by up 99%
No Sediment Disposal
Autonomous data collection system
How we do it
Sediment Improvement
A modular grid is placed in oxygen-poor sediment and electrically connected to a second grid in oxygen-rich surface water. This creates a natural, power-free pathway for sediment microbes to "breathe."
Eelgrass Installation & Ecosystem Recovery
Once the sediment is stabilized, eelgrass shoots are planted directly on the grid.
Over time, the eelgrass:
> Releases oxygen and further enhances sediment health
> Provides habitat and food for marine species
> Gradually takes over the ecological function of the grid itself
Monitoring & Transparency
Low-power sensors continuously measure oxygen, temperature, and other key water parameters. All data is streamed to a real-time dashboard, providing:
> Continuous monitoring and performance validation
> Transparent impact documentation
> Actionable insights for restoration and adaptive management
Application areas
ZosteraGrids can be implemented across diverse aquatic environments:
> Lakes and inland water bodies affected by eutrophication
> Harbours and marinas, where sediment stagnation and poor water exchange are common
> Coastal and open-water sites, supporting large-scale eelgrass recovery
ZosteraGrids with eelgrass planting systems operate within typical growth depths of 1–7m, while sediment improvement only systems can potentially be deployed at depths of up to 20m, pending ongoing real-world testing.
About us
ZosteraGrids is a DTU spin-out born from PhD research exploring how to restore water quality through design, engineering and ecology.
Our vision is to regenerate degraded aquatic ecosystems by transforming sediments from sources of pollution into foundations of life, creating resilient waters that support biodiversity, climate goals, and strengthen local communities.
Our approach is effective: we stabilize sediments, cut harmful emissions, create the right conditions for aquatic life to return, and monitor the process in real time to ensure measurable impact.
Partners
DTU Skylab
Coming soon