Bubble sizes and properties
Bubbles are gas filled cavities in water. The contact area between bubbles in water filled with tiny bubbles is much larger than water filled with bigger bubbles. The gas pressure inside a small bubble is higher than in a large bubble, therefore the surface tension of a small bubble is higher as well.
Ultrafine bubble generation
There are various technologies to generate ultrafine bubbles. This article gives an overview of the most used techniques, such as pressurized dissolution, static mixers, and rotational flow.
ISO fine bubbles
Great things happen when the world agrees, fine bubbles are an innovative technology, but without proper standards for the industry development, there are obstacles. From 2013 ISO started the creation of an International Standard for fine bubbles popularly know as nano bubbles.
