Artificial reefs made from waste: an innovative solution to protect our coasts

At CatMech, in collaboration with the Remote Acquisition and Information Processing Systems Development Center (SARTI), we led a project aimed at addressing two of the major challenges of our time: climate change and industrial waste management. Through the design and manufacture of artificial reefs using recycled materials, we worked to protect coastal environments and restore degraded marine ecosystems.

 

This project, funded by the Ministry of Science and Innovation and the Spanish State Research Agency, was part of the ecological and digital transition initiatives, representing a significant step forward in applying circular economy principles to marine environmental preservation. Artificial reefs not only proved to be an effective tool for mitigating wave impact on coastal areas but also served as refuges that promoted biodiversity. The team developed a type of concrete made from industrial waste, such as steel slag and limestone quarry materials, which included aluminum and iron oxides in its composition. This material stimulated the growth of algae and other marine species, contributing to the regeneration of ecosystems.

 

As noted by Lluís Gil, principal researcher at CatMech,

“Each year, millions of tons of steel industry waste are generated, posing a major ecological challenge. Our goal was to demonstrate that these materials can be repurposed for environmental benefits, helping to restore the most threatened coastal areas.”

 

Thanks to 3D printing technologies, these reefs were efficiently and sustainably reproduced, adapting them to the specific needs of each coastal area. This opened the door to the widespread implementation of this solution in various parts of the world, where the effects of climate change and coastal erosion were increasingly evident. To evaluate the reefs’ effectiveness, the monitoring of pilot tests was carried out using non-invasive tools, such as underwater cameras and environmental sensors. This work was conducted by the OBSEA marine observatory, located in Vilanova i la Geltrú, a leader in marine research. 

 

Climate change was already severely affecting coastal areas, causing more intense storms and degrading marine ecosystems. At CatMech, we worked with the conviction that scientific innovation and the circular economy were key to reversing this situation. This commitment to environmental protection and sustainability drove the development of solutions that made a difference. Let us continue building a greener and more sustainable future together!