Apparatus in the form of a unitary, single-piece structure configured to generate and mix ultra-fine gas bubbles into a high gas concentration aqueous solution

1. An apparatus for generating and mixing gas bubbles into an aqueous solution, the apparatus comprising:

a structure defining an interior fluid-flow chamber extending along a longitudinal axis between an input port at a liquid input end and an output port at a liquid output end, wherein the structure is characterized by:

a gas injection portion located upstream from the liquid output end, the gas injection portion defining a gas injection lumen and a first region of the interior fluid-flow chamber, the first region of the interior fluid-flow chamber comprising a plurality of side fluid-path lumens that extend in a downstream direction alongside a first part of the gas injection lumen, wherein the first part of the gas injection lumen and the plurality of side fluid-path lumens merge with a downstream fluid-path lumen of the first region, and the first part of the gas injection lumen is closer to the longitudinal axis than any of the plurality of side fluid-path lumens; and

a mixing vane portion extending in the downstream direction from the gas injection portion and defining a second region of the interior fluid-flow chamber,

wherein the gas injection portion comprises:

an outer wall;

a first geometric structure surrounded by the outer wall and having a tip facing the input port and a base facing the output port; and

a second geometric structure surrounded by the outer wall and extending in the downstream direction from the base, wherein the second geometric structure comprises the first part of the gas injection lumen; and wherein a first wing structure and a second wing structure are on opposite sides of the second geometric structure.

2. The apparatus of claim 1 , wherein the first part of the gas injection lumen is aligned with the longitudinal axis and the plurality of side fluid-path lumens are offset from the longitudinal axis.

3. The apparatus of claim 1 , wherein the first part of the gas injection lumen:

extends to a downstream opening in fluid communication with the downstream fluid-path lumen, and

is aligned to inject gas through the downstream opening and into the downstream fluid-path lumen in a direction downstream.

4. The apparatus of claim 1 , wherein the second geometric structure is in a shape of a cylinder.

5. The apparatus of claim 1 , wherein the gas injection portion further comprises:

the first wing structure being integral with the outer wall at one end and integral with the second geometric structure at an opposite end; and

the second wing structure being integral with the outer wall at one end and integral with the second geometric structure at an opposite end,

wherein the first wing structure comprise a second part of the gas injection lumen that is transverse to, and in fluid communication, with the first part of the gas injection lumen.

6. The apparatus of claim 5 , wherein:

the outer wall of the gas injection portion has an interior surface

the second geometric structure has an outer surface spaced apart from the interior surface, the outer surface being divided into a first area and a second area by the first and second wing structures,

the space between the interior surface and each of the first area, the first wing structure, and the second wing structure defines a first of the plurality of side fluid-path lumens, and

the space between the interior surface and each of the second area, the first wing structure, and the second wing structure defines a second of the side plurality of fluid-path lumens.

7. The apparatus of claim 6 , wherein the first and second of the plurality of side fluid-path lumens are characterized by a C-shaped cross section.