In brief
Barbados-based scientists have successfully tested a car powered by bio-compressed natural gas derived from invasive sargassum seaweed, amid growing concerns over its impact on local tourism and ecosystems.
In 2011, invasive sargassum started to overwhelm Caribbean beaches, causing distress among locals and threatening the tourism industry with its foul odor when decomposing. This massive influx of algae, attributed to climate change factors, led Barbados' Prime Minister Mia Mottley to declare it a national emergency in 2018. Now, a dedicated group of Caribbean scientists and environmentalists is striving to find a solution by converting this unsightly problem into a valuable biofuel.The University of the West Indies (UWI) in Barbados has pioneered the world’s first vehicle powered by bio-compressed natural gas composed of sargassum, combined with wastewater from local rum distilleries and dung from indigenous blackbelly sheep. The process allows any vehicle to be modified to run on this eco-friendly fuel through a simple installation that costs around $2,500.Initially focused on using sugarcane for fuel production, the team shifted to sargassum after they realized its abundant availability. “We will never run out of sargassum,” stated Dr. Legena Henry, the project's founder. The algae not only presents a new energy source but also alleviates the negative economic impact on tourism as hotels have previously spent significant funds managing the invasive seaweed.As the project developed, student Brittney McKenzie suggested exploring sargassum for energy, inspiring further research. Initial tests showed promising results with biogas production from the combination of sargassum and rum distillery wastewater. The team’s innovative approach gained traction when they presented their findings at the UN General Assembly, earning a $100,000 grant from the US non-profit Blue Chip Foundation.Biologist Shamika Spencer, also involved in the project, reflected on the adverse effects of sargassum. It threatens not only tourism but human health and native species. This initiative showcases Caribbean leadership in addressing climate change's impacts while providing a sustainable energy solution.The team is investing in establishing a biogas station, with plans for larger-scale operations that could fuel public transportation in Barbados. Successful test drives of a biogas-powered Nissan Leaf, watched eagerly by the research team, signaled immense potential for broader applications. By demonstrating innovation amidst adversity, this Caribbean initiative champions the potential of small islands to devise solutions for global challenges. Dr. Henry and her husband, data scientist Nigel Henry, are committed to securing further investment to scale their operation and potentially apply the model to tackle similar challenges worldwide.The journey has inspired many involved in the project, particularly young scientists like Brittney McKenzie, who encourage persistence in pursuing innovative ideas. With continued efforts, the project aims to pave the way for a greener future while turning an environmental burden into an asset for sustainable development in the Caribbean and beyond.
