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Ocean Cleanup: Clean up the oceans with smart boats

A fleet of interceptors, special catamarans that sift the plastic from rivers: this is how The Ocean Cleanup fights against pollution with the help of AI (and Microsoft)

Gianluca Ricciodi Gianluca Riccio
in Environment
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ocean cleanup
October 19, 2020
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Cleaning up the oceans is a huge undertaking, especially for a single nonprofit, but having Microsoft on your side is a nice bonus.

The Ocean Cleanup she's born in 2013 with the aim of cleaning up the great mass of plastic waste in the Pacific. Since then, the project has also embraced the goal of cleaning up the oceans by preventing new waste from entering the ocean. This means cleaning up the rivers that carry many of the pollutants. in 2018, The Ocean Cleanup has partnered with Microsoft to develop machine learning models for tracking and recognizing plastics. Since then, The Ocean Cleanup's plastic “collectors” have been plumbing rivers and learning more and more to recognize the plastic to be cleaned. 

A fleet of interceptors to clean up the rivers

The Ocean Cleanup cleans rivers of plastic with AI-equipped interceptors
The large “belly” of a cleanup interceptor that collects plastic waste

The fight against plastic pollution is active on two fronts: the one already present in the ocean and the one that moves in the ocean through rivers. Plastic in the oceans tends to form masses like the Great Pacific Garbage Patch, the immense island of waste in the middle of the Pacific as big as the Iberian Peninsula.

These masses then break down into microplastics, which can be harmful to marine life and ultimately to people, penetrating everywhere. Hunting for this waste with ships and nets would be expensive, time-consuming and would take enormous quantities of fossil fuels. Instead, the project is working with what it calls a passive system for cleaning. A fleet of solar-powered interceptors that independently collects plastic from rivers before it can reach the ocean, moving with the currents of the rivers.

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The Ocean Cleanup cleans rivers of plastic with AI-equipped interceptors
A sort of sieve collects the waste and conveys it to the interceptors

The Ocean Cleanup: How an Interceptor Works

After the first interceptors already deployed in Jakarta and Malaysia, The Ocean Cleanup hopes to use interceptors on 1000 of the world's most polluting rivers within five years. Vietnam and the Dominican Republic are the next targets. Each interceptor has a capacity of 60 cubic meters (65 cubic yards) of waste and weighs nearly 50 tons. Despite its enormous size, the interceptor is scalable, can work in most of the world's polluted rivers, and requires only minimal human contact with hazardous pollutants. It is a kind of catamaran, in which the water continues to move with the current while the concentrated plastic flows through it.

The current moves the debris onto a permeable conveyor belt, leaving only pollutants behind. Depending on the weather, current and other factors, a single interceptor can collect more than 5 tons (11.000 lbs) of debris in one day. Once full, the interceptor brings the waste ashore to sort it out at a local facility.

This is where Microsoft's help comes in

In 2018, the Microsoft employee Drew Wilkinson he contacted The Ocean Cleanup via email to explain how the tech giant could help the nonprofit at its annual hackathon. "Microsoft has immense computing resources that could really help you track your efforts at a fraction of the cost using AI", he wrote in his outreach email.

Thus, during two corporate hackathons, Microsoft employees built a machine learning model to monitor plastic flowing through rivers with interceptors. Before Microsoft's help, the nonprofit had a person who identified debris images themselves, an inefficient and tedious process. The nonprofit shared the images with Microsoft volunteers, who used the machine learning model to identify plastic versus other debris like leaves or branches. In one summer, they were able to tag more than 30.000 photos.

They are now working on a similar model for ocean photos as well. Vessels in the ocean have a similar cleaning method and return debris to a control center for evaluation. Now, The Ocean Cleanup is working to recycle collected plastics into new products to keep the nonprofit financially sustainable.

tags: pollutionmicroplasticsMicrosoftoceansplastic
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