It doesn’t surprise me that a "Canadian Process Technologies Inc" is writing fairy tales about flotation. This is not their first bad story. I was surprised that Russian scientists from Irkutsk National Research Technical University believe in these tales and even get patents for them!

Bubbles do not make the surface hydrophobic.

Picobubbles cannot exist even theoretically!!! This is complete nonsense!!!
The approximate diameter of the molecules is (2-3) x 10^-10м. 
Picobubbles is 10^-12м?
How can an air bubble be smaller than the molecule of which it consists? 
Complete nonsense!

PhD Natalia Petrovskaya

 References
 https://patents.google.com/patent/DE202016107331U1/de