Dutch inventors have unveiled what they called the world’s first giant outside air vacuum cleaner – a large purifying system intended to filter out toxic¹ tiny particles from the atmosphere surrounding the machine. 

 

荷兰发明者公布了他们所谓的世界上第一台户外巨型真空吸尘器—一台旨在过滤周遭空气中有毒微粒的巨型空气过滤器。
 

 

"It's a large industrial filter about eight metres long, made of steel ... placed basically on top of buildings and it works like a big vacuum cleaner", said Henk Boersen, a spokesman for the Envinity Group which unveiled the system in Amsterdam. 

 

The system is said to be able to suck in air from a 300-metre radius² and from up to seven kilometres upwards³. 

 

It could treat some 800,000 cubic metres of air an hour, filtering out 100% of fine particles and 95% percent of ultra-fine particles, the company said, referring to tests carried out by the Energy Research Centre of the Netherlands (ECN) on its prototype. 

 

A large column of air will pass through the filter and come out clear, Boersen told AFP on Tuesday, speaking on the sidelines of a major two-day offshore⁴ energy conference in Amsterdam.

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