System, device, and method to manufacture nanobubbles

A method of making nanobubbles, comprising:

• providing a nanobubble generator system consisting of
• a medium, wherein in the medium is a liquid medium or a semi-liquid medium;
• a device immersed in the medium, the device consisting of:
• a ceramic membrane having a first surf ace and an opposing second surface, and a plurality of pores extending through the ceramic membrane from the first surface to the second surface;
• and
• a hydrophobic porous coating layer disposed on the first surf ace of the ceramic membrane, wherein the hydrophobic porous coating layer is non-metallic and selected from a group consisting of stearic acid, octadecanoic acid, and silica coating;
• and the pores of the ceramic membrane have a diameter ranging from about 20 nm to about 500 nm;
• a linear plenum defined by the opposing second surface of the ceramic membrane, the plenum having a first opening and an opposite facing second opening, and the plenum fluidly coupled to the pores of the ceramic membrane at the second surface;
• the first opening and the second opening are facing linearly opposite, and are both on a singular and same axis as each other;
• and
• a gas source for providing a pressurized gas to the medium via the pores, and a conduit disposed between the gas source and the ceramic membrane and the conduit having two outlets for providing the gas, wherein the gas enters the pores on the opposing second surface of the ceramic membrane and the gas enters the plenum bi-directionally from different and opposite facing directions on the singular and same axis of the first and the second openings, and the gas exits the hydrophobic porous coating layer in the form of a plurality of nanobubbles that have a controlled sized diameter, and the gas source creates an injection pressure at about 60 psi or higher, as indicated by a gas flow meter or a gas pressure regulator, to generate the plurality of nanobubbles having a controlled diameter ranging from about l 00 nm to about 300 nm;
• flowing the gas into the medium containing the device immersed therein;
• and
• generating the plurality of nanobubbles in the medium by injecting the gas through the first and second openings into the plenum, and subsequently through the pores of the ceramic membrane at the second surface, wherein the gas exits the device at the pores in a form of the plurality of nanobubbles.