Barbados generates around 95% of its electricity from imported fossil fuels, making energy expensive and environmentally unsustainable for the island nation. At the same time, the invasive Sargassum seaweed has overwhelmed its coastlines, damaging tourism—a sector that contributes nearly 17% of Barbados’s GDP. Researchers in Barbados have found a solution to both challenges: turning Sargassum seaweed into biomethane biofuel, a clean and renewable energy source. Tested successfully in a specially adapted vehicle, this breakthrough could reduce energy costs, restore tourism and position Barbados as a leader in sustainable energy innovation.

Seaweed Power Cars

The process of converting seaweed into fuel combines three key components: wastewater from the rum industry, sheep dung and Sargassum, a type of seaweed commonly found in Barbados. These elements undergo anaerobic digestion, producing a biofuel known as biomethane. This biofuel powers a specially modified Nissan Leaf owned by the Caribbean Centre for Renewable Energy and Energy Efficiency (CCREE). While biofuel is currently limited to a test vehicle, it has the potential to become a mainstream energy source. Rum and Sargassum experts claim a petrol car can be upgraded to run fully on biomethane in just four hours.

Barbados’ Seaweed Challenge

In June 2018, the government declared a national emergency as the invasive plant inundated coastlines, creating significant economic challenges. The sheer volume of seaweed takes a large toll on the tourism industry in Barbados and has plagued its many hotels. According to STR, hotels unaffected by Sargassum experienced a 3% year-over-year increase in revenue per available room (RevPAR) in 2018, while those in affected areas saw declines of 4.4% in RevPAR and 4.7% in occupancy. The sheer volume of seaweed has burdened the country’s infrastructure and harmed its reputation as a pristine travel destination. However, if scaled up, the seaweed biofuel concept could offer a dual solution: powering a new generation of vehicles while removing Sargassum from coastlines.

Driving Investment and Economic Growth

Barbados has set an ambitious goal to become a 100% renewable energy and carbon-neutral island state by 2030. Seaweed-based biofuel aligns perfectly with this vision, positioning the country as a global leader in renewable innovation. Achieving this target would not only bring international recognition but also attract foreign investors eager to support sustainable projects. The country’s pioneering efforts could also open doors for international collaboration and funding in the renewable energy sector. According to the International Renewable Energy Agency (IRENA), investments in clean energy are increasing annually and Barbados’s proactive approach may secure a significant share of this funding.

Boosting Tourism with a New Purpose

The benefits of seaweed biofuel extend beyond energy. By creating value for Sargassum, Barbados can transform a long-standing problem into an economic asset. The incentive to clear beaches will increase, allowing the tourism sector to recover and thrive. Hotels that once struggled with declining occupancy due to the unsightly and smelly seaweed will regain their appeal, attracting visitors and boosting local businesses. For a country with a population of fewer than 300,000 people, this innovation places Barbados on the global stage. What began as a challenge with an invasive plant could now position the island as a leader in renewable technology and sustainable development.

Moving Forward

The development of seaweed-based biofuel in Barbados provides a practical solution to two longstanding challenges: renewable energy production and environmental management. By transforming Sargassum seaweed into a valuable resource, Barbados has an opportunity to lead in sustainable innovation. Furthermore, as the country works toward its carbon-neutral goals, this breakthrough could improve local energy independence, attract investment and restore its vital tourism sector, creating a cleaner and more resilient future.

– Andrew Nicoll

Andrew is based in Long Melford, Suffolk, UK and focuses on Business and Politics for The Borgen Project.

Photo: Flickr