US Patent 7662288 - Nanobubble water pretreatment

http://www.freepatentsonline.com/7662288.html

This patent from Sharp teaches a way to induce nanoscale bubbles in water in order to activate aerobic or anaerobic microorganisms and help recycle waste water. Claim 1 reads:

1. A water treatment method, comprising:

a first step of introducing micro-nano bubbles of air or nitrogen into at least one of a plurality of upstream water treatment devices to produce treatment water; and

a second step of pretreating said treatment water to produce pretreatment water and treating said pretreatment water in a downstream waste water treatment device.