just in case you were wondering, this is not a real device. Interesting concept but this would need to be considerably more bulky to drive enough water through the filters. About 200litres of water needs to be flowed through the device per minute. For a working prototype for comparison see: http://www.youtube.com/watch?v=D23HLDZvX2w which works with a compressor. The poster should make it clear that the device mentioned is not an actual device, nor likely to be feasible without a relatively large pump and power supply.
From the active minds of Yanko Design. Creators of impractical renderings for years.
...using an Aston Martin to chase an assassin motorcyclist through a built-in-middle-ages town on market day.
When will unlicenced use of a gyrocopter be permitted?
Computers are useless. They can only give you answers. -- Pablo Picasso