How a student turned waste glass into an ‘oyster home’ and won Rs 1.2 lakh award

What if a material that is normally thrown away could help rebuild marine habitats? That question became the basis of a multi-year science project by Delaney Peterson, a student at Belleview High School in Florida, who explored whether recycled foamed glass could be used to create surfaces where young oysters can settle and grow.

Peterson's project, titled “Revolutionising Artificial Reefs: Recycled Foamed Glass Aggregates as a Sustainable Solution for Oyster Habitats, Year 3,” examined the potential of using recycled foamed glass aggregate as an alternative material for artificial oyster reefs.

The project also earned her a Third Award worth $1,200 at the 2026 Regeneron International Science and Engineering Fair (ISEF), according to the Society for Science.

How discarded glass could help oysters

Oyster larvae cannot simply settle and establish reefs on any surface. They need a firm structure to attach themselves to before they can develop into oysters and contribute to the growth of a reef.

That is where Peterson's experiment comes in.

She studied recycled foamed glass aggregate, a lightweight and porous material produced by processing discarded glass. Unlike ordinary stone, the material contains air-filled spaces, making it less dense while still providing a hard surface.

The idea was relatively simple but unusual: could a material created from waste provide the kind of foundation that young oysters need?

Florida's oyster restoration programmes already use hard materials, including recycled oyster shells, to create suitable surfaces for oyster larvae. The Florida Department of Environmental Protection says oyster larvae can settle on structures such as existing reefs, rocks, pilings, fallen trees and recycled oyster shell.

Mud and sand, by contrast, do not provide the hard surface needed for successful settlement.

The experiment began with a different question

Peterson's work on artificial oyster reefs did not begin with foamed glass.

Her earlier research focused on another issue — whether the size of aggregate used in artificial reef structures could influence oyster spat recruitment. Spat refers to young oysters after they settle on a suitable surface.

That research eventually led her towards the question of whether different materials could offer better or more sustainable surfaces for oyster settlement.

Her ISEF project then focused on recycled foamed glass aggregates and their potential application in artificial oyster reefs.

The research effectively connected two very different environmental problems: what to do with discarded glass and how to create more suitable material for restoring oyster habitat.

Why oyster reefs are important

Oyster reefs are more than places where oysters live.

Oysters are filter feeders, meaning they remove suspended particles from the water as they feed. Their reefs can also create habitat for a range of other marine species, including fish and crabs.

The physical structure of a reef can serve another purpose too. Oyster reefs can help reduce wave energy and contribute to shoreline protection, making them valuable in coastal ecosystems.

This is why restoration projects need suitable hard substrates. Once oysters establish themselves on a structure, later generations can settle on the growing reef, allowing the habitat to develop further.

The University of Florida's UF/IFAS notes that restoration efforts commonly depend on hard substrates such as recycled oyster shell, although obtaining enough suitable shell can be a challenge.

That shortage has encouraged researchers to look at alternative materials.

Could foamed glass become an alternative?

Peterson's research raises the possibility that recycled foamed glass could eventually become one such option.

If the material can provide a stable surface for oyster recruitment, survive marine conditions and meet environmental safety requirements, it could potentially serve a dual purpose — diverting discarded glass from waste streams while providing material for habitat restoration.

But the research does not mean foamed glass is ready to replace conventional oyster-reef materials.

More testing would be required to determine how well the material performs over longer periods, whether oysters consistently settle on it and whether it remains environmentally safe when deployed at larger scales.

Those questions are particularly important when a new material is introduced into a marine ecosystem.

A science project with a bigger environmental idea

What makes Peterson's project stand out is the way it approaches two separate environmental concerns through one possible solution.

Oyster restoration requires hard surfaces. At the same time, communities generate waste materials that may otherwise have limited uses.

Recycling one into a potential building block for the other is the central idea behind the project.

Her recognition at ISEF gives the experiment added attention, but its broader significance lies in the question it raises for environmental restoration: does every solution have to rely on newly extracted materials?

Peterson's work suggests that, in some cases, waste products could become part of the answer.

For oyster reefs, however, the next step is more testing. Before recycled foamed glass can be considered for widespread restoration, researchers would need stronger evidence on its long-term performance, oyster recruitment and impact on marine ecosystems.

The experiment therefore offers a promising possibility, rather than a finished solution — one that turns an unlikely material, discarded glass, into a subject of research for rebuilding life along the coast.