El The Ocean Cleanup project, Founded by Boyan Slat Launched in 2013, it is one of the most innovative and ambitious initiatives in the fight against plastic pollution in the oceans. Slat, who was only 19 years old when he launched the project, laid out a bold plan to drastically reduce the amount of plastics in the oceans, using a passive system that harnesses ocean currents to capture waste without ongoing active intervention.
What is The Ocean Cleanup?
The Ocean Cleanup is a non-profit organization based in the Netherlands that aims to remove plastic from the oceans and stop its entry from rivers. Every year, it is estimated that 8 million tons of plastic waste They reach the oceans, helping to form areas such as the Great Pacific Garbage Patch, which has an estimated surface area three times that of Spain.
The central focus of the project is a floating U-shaped structure that works like a giant funnel, capturing plastic waste while allowing marine life to pass through. This is a key factor that sets The Ocean Cleanup apart from other solutions, as it does not use conventional nets that could be harmful to marine life. The system is completely passive, taking advantage of natural currents to move waste to a central point where it is collected.
The first successes of the project
The project has had numerous milestones since its creation. In 2019, it was possible to collect 55 tons of plastic waste in the Great Pacific Garbage Patch in an operation that lasted six weeks. The significance of this achievement is that it demonstrated that although plastic in the oceans is a massive problem, it is possible to begin cleaning it up effectively with the right technology.
Today, The Ocean Cleanup is not just focused on the ocean, but has deployed systems in several key rivers around the world. The logic behind this is that Most of the plastic that reaches the oceans originates in rivers, suggesting that by stopping the flow of plastics from these bodies of water, marine pollution at its source can be significantly reduced.
How does the ocean collection system work?
The system used in the oceans relies on a floating U-shaped structure that is fitted with underwater fins to prevent plastics from escaping. Unlike other initiatives, it does not use conventional nets, allowing fish and other marine species to swim freely beneath the barrier. As plastic accumulates in the centre of the structure, an auxiliary ship collects it for further treatment.
This innovative design makes the system highly efficient, taking advantage of natural ocean currents to concentrate waste. The long-term goal of The Ocean Cleanup is to eliminate up to 90% of plastics floating in the oceans by 2040.
The Interceptor initiative in rivers
In addition to the oceans, The Ocean Cleanup has directed its efforts towards rivers, creating solutions such as the Interceptor. This device was launched in 2019 and is specifically designed to stop the flow of plastics before they reach the sea. The Interceptor is completely autonomous and has been deployed in some of the most polluted rivers in the world, such as the Mekong River in Vietnam and the Citarum in Indonesia.
This device can collect up to 50 tons of waste per day and has already begun operating in several countries. By stopping the flow of plastic from rivers, the primary sources of plastic pollution are attacked, generating an even bigger impact than direct cleanup in the ocean.
Microplastics: the hidden challenge
Despite great strides in combating pollution, The Ocean Cleanup faces criticism for failing to directly address the problem of microplastics and nanoplastics floating in the water column or deposited on the seabed. These fragments are too small to be captured by current systems and are already affecting aquatic ecosystems in an alarming way. In addition, microplastics worryingly end up in the human food chain.
Boyan Slat and his team are aware of this challenge and are working to develop new technologies that can tackle smaller plastics, although the priority remains capturing large waste before it degrades into microplastics.
Challenges and future of the project
Although The Ocean Cleanup has made great strides, logistical challenges remain, such as sorting and storing the collected plastics. As the project scales up its operations, increasing trash volumes mean the need for optimize waste compaction both offshore and onshore to reduce transportation costs.
As of 2021, The Ocean Cleanup has managed to remove over 200 tonnes of plastic from the oceans, including microplastics which pose a major challenge. However, it is estimated that only 1% of marine plastic is visible on the surface, so the task of cleaning up the oceans remains monumental.
As The Ocean Cleanup moves towards its ambitious goal of cleaning up 90% of ocean plastics by 2040, it is clear that technology alone will not solve the problem. Global cooperation will be crucial to reduce plastic production and improve recycling systems to prevent more waste from entering the marine ecosystem.
The project has raised global awareness about plastic pollution, engaging governments, businesses and citizens in the cause. The combination of technological innovation and education could be the key to saving our oceans.