A Novel Algae Synergy for Carbon Capture and Water Purification

Inspired by concerns close to home, this young innovator is exploring new ways to clean water 

Growing up in a small northern town in the Yukon, Ingenious+ national winner Lilou Lefebvre saw firsthand how environmental challenges can affect communities with limited resources and infrastructure.

“Two years ago, my partner and I tested our local water for a school project and discovered that it contained lead,” Lilou said. “That moment stayed with me.”

That experience sparked a deeper interest in finding environmental solutions that are affordable, sustainable, and accessible for remote and northern communities.

The innovation builds on algae’s natural ability to absorb carbon dioxide and help clean polluted water, while exploring how advanced materials could improve its efficiency and stability in real-world conditions.

“My project uses algae, graphene quantum dots, and marine polysaccharides to build a low-cost bioreactor system that captures CO₂ and purifies polluted water,” Lilou explained.

The result is a Novel Algae Synergy for Carbon Capture and Water Purification, an experimental algae-based system designed to improve both water purification and carbon capture.

The project combines algae, graphene quantum dots, and marine polysaccharides in a way that, according to the research conducted so far, has never been tested before.

To test the concept, a custom 34-bottle bioreactor system was designed and assembled with controlled lighting, aeration, and daily monitoring.

Different combinations of materials are tested in both clean and polluted water while tracking factors such as carbon absorption, growth rate, and water quality.

The project was also shaped through collaboration and independent research. Lilou consulted with a professor at Yukon University, connected with professionals working in sustainable materials, and worked with industry experts to source specialized materials like chitosan.

Living in a small northern community also shaped the broader purpose behind the project. “It made me realize how many remote or northern communities face water contamination but don’t have access to affordable, effective solutions,” Lilou shared.

As an Ingenious+ national winner, Lilou received $10,000 to continue advancing the project. Funding will support expanded testing, improved equipment, additional research, and future collaboration opportunities to further develop the system’s potential applications.

About Ingenious+

Ingenious+ is the Rideau Hall Foundation’s national youth innovation challenge, supporting young people aged 14 to 18 who are creating solutions to challenges in their communities and beyond. Alongside funding, participants gain access to mentorship, networking opportunities, and national recognition that help them grow their ideas and connect with fellow young innovators.

In 2026, 215 young people across Canada received more than $230,000 through Ingenious+, supporting projects focused on climate change, health and wellbeing, accessibility, community connection, and technology. Learn more about Ingenious+.