The Bubble Barrier was commissioned by the Amstel, Gooi and Vecht Water Management Board and the Municipality of Amsterdam as an extension of “Amsterdam Clean Water” which strives for clean plastic-free waters in Amsterdam. The location, the Westerdok, is one of the points where the water flows from the monumental canals of Amsterdam into the IJ. The IJ flows into the North Sea Canal and this leads directly to the North Sea. This makes Westerdok an ideal place to catch Amsterdam’s canal plastic.
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The Bubble Barrier in the Westerdok is strategically placed to be able to stop as much of the outflow of plastic from Amsterdam’s city center as possible. The Bubble Barrier complements the garbage boats of Waternet and also catches plastic in the weekends and evenings, 24 hours a day, 7 days a week.
The Bubble Barrier does not only collect plastic on the surface, but also under the water surface. The rising bubbles of the Bubble Barrier create an upwards current which brings the plastic to the surface of the water. Due to the diagonal placement in the waterway, the Bubble Barrier uses the natural flow to guide the plastic to the collection system at the river side.
With the Bubble Barrier in Westerdok, the Amstel, Gooi and Vecht Water Management Board is looking for a solution that captures floating plastic and smaller plastic waste up to 1 millimeter.
With the current collection methods in Amsterdam, only plastic which remains inside the city is removed and only pieces which are larger than 2cm. It will also be monitored how much and what kind of plastic is removed from the water with the Bubble Barrier. In addition, the Bubble Barrier can be used for further research purposes.
1. Plastic in water
Plastic in the water, which flows through the Amsterdam canals to the Bubble Barrier and is guided by the bubbles into the catchment system.
Boats can sail through the Bubble Barrier without a problem.
3. Bubble Barrier
The Bubble Barrier is placed diagonally in the river, in a precisely calculated angle for the maximum capture of plastics.
4. Catchment system
The catchment system which retains the plastic until removal.
Electric compressor which supplies the air for the Bubble Barrier (placed in an insulated container)
Water without plastic waste flows via the river IJ into the North sea.
Waternet works on behalf of the Amstel, Gooi and Vecht Water Management Board and the municipality of Amsterdam and does everything it can to remove the waste from the inland waterways before it reaches the IJ, let alone the sea. In Amsterdam, Waternet collects 3,500 kg of waste from the water with its garbage boats, including a lot of plastic. On an annual basis, around 42 tonnes of plastics are removed from Amsterdam’s inland waterways. This plastic floats on, or directly below, the surface of the water, but there is also a lot of plastic waste under water which was previously difficult to capture. Moreover, the plastic is only removed at regular intervals in the city by the garbage boats. At the same time, a large amount is constantly flowing to the IJ and the sea.
It was difficult to find a solution for the plastic under water. This means that waste from the street, which is not immediately cleaned up, has a great chance of ending up in the North Sea where it becomes part of the ‘plastic soup’ and causes great damage to the environment and also to people when it enters the food chain.
AMSTERDAM – CITY OF WATER
More water than Venice, more bridges than Paris. In addition to its artistic heritage, the Dutch capital is best known for its inland waterways. Of those inland waterways, the seventeenth-century canal belt is even on the list of UNESCO world heritage. Situated on the Amstel between the North Sea and the Zuiderzee, Amsterdam was for centuries one of the most important port cities in the world. For example, a canal network was built at the end of the 16th and 17th centuries after land reclamation to expand the city area. In order to improve the connection with the North Sea, the North Sea Canal was built in the 19th century. In combination with the IJ, this waterway provides a passage from the fresh water IJsselmeer to the salty North Sea and other waterways such as the Amsterdam-Rhine Canal. The Amstel also provides an extensive migration route from the interior to the open sea for both shipping and aquatic life.
CIRCULAIR AND CLEAN
To this end, Amsterdam Clean Water was entered into a long-term program of 3 years, aimed at structural changes in waste management in relation to the waters of Amsterdam. The aim of the program is to reduce the amount of waste which ends up in the canals and the IJ every year.
The collected waste of the Bubble Barrier will be investigated by the Plastic Soup Foundation.
“We want to remove as much plastic as possible from the water to prevent pollution of the North Sea. Of course, we would prefer that no plastic is entering the environment at all – with the Bubble Barrier we are at least tackling pollution from the canals.”
– Sander Mager, daily board member, Amstel, Gooi and Vecht Water Management Board
“Although we want to prevent plastic litter as much as possible through new measures and the installation of enough waste bins, a lot of plastic still ends up in the canals with or without intent. I am therefore delighted to enter into a partnership with Waternet to do something about canal plastic”
– Marieke van Doorninck, Municipal councilor, Municipality of Amsterdam