An aeration plate is provided, including an aeration top plate portion and a side baffle portion. The aeration top plate portion is scattered with a plurality of aeration holes, such that the aeration top plate portion and the side baffle portion cooperate to form an aeration member. A fruit and vegetable cleaning machine is provided, including a machine body. The machine body is provided with a cleaning tank with a top opening, and the cleaning tank is provided with the aeration plate at an inner bottom wall, such that an area enclosed by the aeration top plate portion, the side baffle portion, and the inner bottom wall forms a first dissolving zone for gas and water, and a second dissolving zone for bubbles and water is formed between a periphery of the aeration plate and the cleaning tank.

A device for generating bubbles, comprising a porous material having at least one hydrophilic surface (1), arranged such that a liquid (7) in which the bubbles (6) are intended to be formed may contact the hydrophilic surface (1) and at least one hydrophobic surface (2), arranged such that a gas (5) used to generate the bubbles (6) may flow past the hydrophobic surface (2) before it flows past the hydrophilic surface (1). The device may be used for creating fine bubbles in numerous applications, such as wastewater treatment, plant cultivation, aquafarming, aeration systems, bioreactors, fermeters, oil extraction or fuel cells.

A method and apparatus for producing chlorine gas whereby a nanobubble generator introduces nanobubbles at a concentration of at least 10.sup.6 nanobubbles per cm.sup.3 into an electrolytic cell comprising a pair of electrodes and a chlorine-containing, electrolyzable liquid, and the electrolytic cell is operated to produce chlorine gas.

An annular axial mixing system for combined gas and liquid flow. The system includes a gas-liquid separator to separate a multiphase gas and liquid into a gas flow and a liquid flow. A lower leg in communication with the gas-liquid separator is configured to receive liquid flow. An upper leg in communication with the gas-liquid separator is configured to receive gas flow. An annular mixing chamber receives gas from the upper leg. A static liquid chamber, at least a portion of which is within the mixing chamber, is in communication with the lower leg and includes perforations therein to receive gas bubbles from the gas in the annular mixing section chamber in order to mix the flows.

A chemical solution vaporization device includes a chemical solution tank including chemical solution vaporization rooms, a chemical solution sensing room, and a chemical solution supply room. A first internal wall separating the plurality of chemical solution vaporization rooms from each other includes a first opening at a lower portion thereof. A second internal wall separating at least one of the plurality of chemical solution vaporization rooms from the chemical solution supply room includes a second opening at a lower portion thereof. A third internal wall separating at least one of the plurality of chemical solution vaporization rooms from the chemical solution sensing room includes a third opening at a lower portion thereof. And a lower portion of a fourth internal wall separating the chemical solution sensing room from the chemical solution supply room is combined with the lower wall.

A mixing aerator is disclosed that includes a housing defining a chamber having a bottom end and a top end, the housing having at least one inlet and at least one outlet; and a longitudinally extending diffuser disposed within the chamber and configured to deliver air bubbles into the chamber when the chamber is filled with liquid. The diffuser includes (a) a tubular elastomeric membrane having a plurality of perforations and, within the tubular elastomeric membrane, (b) an air pipe having a plurality of openings, the openings being larger and fewer than the perforations, and the tubular membrane having upper and lower ends that are sealed against an outer surface of the air pipe.

An air diffuser includes: a bottom panel provided in a horizontal direction in a tank in which water is filled; an air diffusion body installed to cover the bottom panel from above; and air diffusion holes arranged to penetrate through the air diffusion body, gas fed to a gap between the bottom panel and the air diffusion body is discharged into water through the air diffusion holes, and an air diffusion region of the air diffusion body where the air diffusion holes are arranged has a width equal to or larger than 10 mm and smaller than 120 mm.

An apparatus, buffer solutions and a method are provided for pH control of in vitro dissolution tests used to monitor the drug release rate from solid unit dosage forms which are used to predict their in vivo effects or for quality control purposes. A method of preparing a continuous condition and a clear bicarbonate ion based solution for in vitro dissolution testing of pharmaceutical products is also provided. An enclosure device is also provided for use in the provision of pH control and stabilization to a bicarbonate based solution used in the in vitro dissolution testing of pharmaceutical products.

A diffuser is disclosed and includes a channel with an inner portion having an inlet and an outlet through which a gaseous substance enters and exits the diffuser, respectively. The inner portion includes a first conical section that has an increasing cross-sectional area, taken along a plane perpendicular to a central axis, in a first direction. The inner portion also includes a second conical section that has a decreasing cross-sectional area, taken along a plane perpendicular to the central axis, in the first direction. The second conical section is communicatively coupled with the first conical section. The outer portion includes a first annular section that has an increasing cross-sectional area, taken along a plane perpendicular to the central axis, in a second direction opposite the first direction. The diffuser further includes a plurality of orifices that communicatively couple the second conical section with the first annular section.

Various embodiments relate to an aeration device for a bioprocessing installation, in particular a bioreactor, comprising a housing, wherein the housing comprises one or more aeration channels in its interior, wherein the housing further comprises one or more gas inlet ports, via each of which a gas can be introduced into at least one aeration channel of the housing, and wherein the housing further comprises a plurality of gas outlet ports, via each of which the gas can be discharged from the respective aeration channel to the outside of the aeration device. It is proposed that the aeration device is configurable with respect to a predetermined discharge of gas via the gas outlet ports.