Invention or hoax?

[DanL]

Using info from the article:
1.5% dissolved AIR in water at 100ft depth
Assume SAC rate of 0.8cfm
At 100 ft, air use then 3.2cfm
Weight of 3.2 cf of air=111grams
To get 111g of air out of water at 1.5% dissolved air:
      111/0.015 = 7400g water (at 100% efficiency)
No extraction process is 100% efficient - assume 75%(still high)
        7400/0.75 = approx 10kg
        10kg water = 22lbs or about 3 gallons
Unit would have to centrifuge 3 gallons/minute of water.
That seems like a lot for a battery operated centrifuge!
Also - what's dissolved in the water?  Any CO?
Sounds unlikely.