Startup uses 3D prints to build “Urban Reefs” for better Air Quality

Publicerad denFörfattareNoah Duker

The Dutch startup “Urban Reef” uses 3D printers with renewable materials to create sculptures that are planted with a variety of mosses, mushrooms, and other plants. These help clean the polluted air of big cities with their natural processes like photosynthesis. As of now the project is still in development but already shows promise as sustainable solutions for improving air quality are hard to come by. 
Amsterdam – Bio inclusivity is the word of the day. Cities have, ecologically speaking, come closer to deserts than any other biome they might have been built upon. Parking spaces, multilane highway systems and other concrete infrastructure have driven a large chunk of wildlife as far away from the city as possible. Despite the efforts of numerous city councils across the world, this model of car dependent cities and fossil fuelled economies has led to poor air quality reaching health endangering levels. 
Combating dangerous air pollution with “Urban Reefs” made of sustainable sculptures and plants
This is where urban reefs come in: the young studio based in the Netherlands has started up a variety of projects, promising improvements when it comes to air quality and biodiversity in cities. Similar to what reefs are for shallow ocean biomes, these urban reefs, are supposed to be an oasis for different species of plants and fungi. Sprinkling these reefs across cities would be a cheap and space efficient way of making cities more liveable. 
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“Urban reefs” is using 3D printers filled with biodegradable, “living” material, allowing plants to easily grow on the surface. The method allows for cheap and sustainable ways to produce all kinds of things. In their case, shell-like sculptures to house the plants. At this point, their team is focused on a variety of improvements, like improving the materials used and the shell designs, as well as bio receptivity research, looking at what conditions are favourable for growing communities of organisms in an urban environment. 
The step away from concrete is important considering that the sand used for concrete is getting rather scarce due to a boom in the construction industry around the globe. Concrete needs sand as a main ingredient, but not every kind of sand is usable, dessert and ocean sand is too smooth to be used for industrial purposes. 
Air pollution responsible for growing cancer rates in cities
When it comes to air pollution, it is important to distinguish between particular matter (pm) and coarse dust. Particular matter are particles up to 2.5 micrometres, coarse dust has a size up to 10 micrometres. The danger of air pollution lies with the particular matter, emitted by cars, tires, coal power plants and other methods of heating. According to the World Health Organization (WHO), being subject to large amounts of air pollution, especially pm, over time can lead to “increased risk of respiratory infections, heart disease and lung cancer”. 
But what causes air pollution? The obvious culprit is cars, not just in burning fuel, but also in not so obvious ways, like wearing down tires that emit small plastic particles into the air and further into our lungs. With results like this, it’s no wonder that projects to help filter these particles out of the air are in high demand. The plants, also subject to the same pollution, have better capabilities when it comes to filtering these harmful microscopic particles than humans.  Läs mer…

Dutch startup uses air bubbles to remove plastic from rivers

Publicerad denFörfattareneuezeit.at

Dutch startup “The Great Bubble Barrier” has been building “air curtains” and removing tons of plastic from rivers since 2017. The technology is simple and promising. With the help of pipes in the water, a curtain of air is formed. Fish and other river dwellers can swim through it, while plastic waste is intercepted. 
The Amsterdam-based startup has been working on the technology behind the so-called “bubble barrier” for seven years. Initial pilot tests started in spring 2017, and the first filter system has been in place on the River IJssel in the Netherlands since November of the same year. Even tiny pieces of plastic with a diameter of one millimetre can be fished out of the water with it. The startup is currently testing whether even smaller plastic particles, i.e. less than 0.05 millimetres, can be filtered with the air barrier.
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Simple technology, clean rivers, healthy people
The way the air barrier works is simple. Pipes at the bottom of a river or canal pump air into the water. Combined with the current, the plastic pollution is collected together on one bank. From there, the plastic goes into a collection system. Then the trash is separated and can be disposed of properly. The start-up’s invention would also be great outside the Netherlands, because Austria’s rivers are also full of trash.
The WWF reports that almost two-thirds of Austria’s waters need to be “cleaned up.” Only 15 percent are still in “very good” condition, the paper states. Reasons for the pollution include the heavy construction density of some regions, as well as the industrial usage – such as sewage disposal or cargo shipping – of rivers. Environment Minister Gewessler (Green Party) complained about the “littering of our environment and waters”, but the interim report of the “Action Plan Microplastics” is still pending.
A stream of air bubbles propels the trash into a collection bin (Photo: The Great Bubble Barrier®)
Nearly 80 percent of plastic pollution in the sea comes from rivers
The technology from Holland not only holds promise for cleaning up freshwater streams, but also contributes to the cleaning of the oceans. Around 80 percent of plastic in the world’s seas comes from rivers. Currently, it is estimated that there are between 100 and 150 million tons of trash in the oceans. More than three-quarters of this is plastic. Every year, rivers wash between five and thirteen million tons more into the seas. Four million tons come from just ten major streams.
“We tested for six months in Amsterdam, and during this period we removed around 85 kilograms of plastic per month from the water,” say the founders of “The Great Bubble Barrier.
Projected over a year, that’s more than a ton of plastic waste. This is good not only for the environment, but also for people. Because the trash doesn’t just stay in the water. Fish and other sea creatures eat the plastic pollution. These then get back into the human organism via food, and there the – so called – microplastics can even lead to hormonal changes. Clean oceans, intact environment, healthier people – that seems to be the promise of the air curtain technology from the Netherlands. Läs mer…