These unusual leaf-shaped wall tiles aren’t just beautiful — they also actively clean pollutants out of rainwater using channels of living algae. Created by students at the Bio-Integrated Design Lab at University College London (UCL),
Wastewater management
The Indus tile system’s algae-based bioremediation process involves placing a wastewater tank on top of the building and then allowing gravity to funnel the water though “veins” in the “leaves.” The designers traveled to India and observed the production processes of textile dyers in Panipat and bangle makers in Kolkata, where various processes release different types of heavy metals into the wastewater. The team found that one particular type of algae was able to reduce cadmium levels in the water by 10 times within 45 minutes.
Fabricated in Khurja, India, which is known for its
The modular tiles fit together into a beautiful pattern using half-lap joints, so individual tiles can be replaced as necessary without disassembling the entire wall. This also makes it easy to scale the wall size up or down, tailoring it to each site. In the future, the designers hope to integrate a second phase in which the saturated hydrogel packed with heavy metals is removed and sold to high-tech companies, which can use the metals in their own manufacturing processes. The Indus tiles are set to undergo performance tests in the UK and then a pilot project in India itself.
The creators imagine adapting Indus wall tiles to different regions and needs, making them from local materials like stone or even waste materials. Different tiles could be tailored to different pollutants, infused with the particular type of algae that works best in that context. Given that the end result is so beautiful, it’s not hard to imagine the concept extending to residential applications, too. Just imagine installing a wall of these at the edge of your own roof instead of a gutter, cleaning rainwater for personal use later on.
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