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 microbubble spray head and a washing apparatus with the same. The microbubble spray head includes a spray pipe, where the spray pipe is of an integrated or two-part hollow pipe structure, an air inlet channel is provided in the spray pipe, the spray pipe is configured to enable water flow to generate negative pressure in the spray pipe, external air is sucked into the spray pipe via the air inlet channel by the negative pressure and is mixed with water flow in the spray pipe to form bubble water; and a bubbler, where the bubbler is fixed at the outlet end of the spray pipe and is configured to be capable of forming microbubble water when the bubble water flows through the bubbler. The microbubble spray head has good microbubble generation performance and low manufacturing costs.

A sparger assembly for a bioprocessing system includes a base and a plurality of spargers connected to the base, each sparger including a plurality of pores, the plurality of spargers each have a generally cylindrical shape. Each of the plurality of spargers includes a sidewall and a top, which define the cylindrical shape, the sidewall and the top each include a plurality of pores. The pores of the sidewall can be arranged around a circumference of the sidewall at an array of heights. Ridges may also be located on the sidewall above a respective array of pores.

A mixing apparatus is disclosed for ponds and other shallow bodies of water. The apparatus uses air flow to entrain and move large volumes of water up and through the mixer. This movement of water creates a mixing of water from different depths within the body of water, and thus prevents, eliminates, or reduces stagnation of the water. The air flow is driven by one or more blowers, which may be mounted on the apparatus. The air from the blower is injected into the water about one to two feet below the surface. The air is injected through a series of relatively large holes positioned on opposed sides of tubing. The injected air creates water flow in sufficiently large volumes to mix the water within a shallow body of water of moderate size.

Aeration device for bioreactors with an aeration element with gas outlet openings arranged in a housing, the aeration element taking the form of a microsparger, the gas outlet openings of which are in each case spaced apart from one another and have a size of between 100 m and 200 m. At least one second aeration element with gas outlet openings of a second size is preferably provided, the aeration elements being formed by a common housing with separate aeration channels.

A microbubble generation device comprises a liquid inlet (101), a gas inlet (104), a bubble flow outlet (103), and a gas-liquid mixing chamber (102). An air-permeable hole having an angle structure is provided at a gas-liquid interface of the gas-liquid mixing chamber (102), and a pointed end of the angle structure of the air-permeable hole points to a liquid flow direction. The bubbles generated by the device are extremely small in diameter, prolonging a duration the bubbles stay in the liquid phase, and enhancing gas-liquid mass transfer efficiency.

A gassing device for the intermittent introduction of oxygen-containing gas or air into the waste water of a sewage treatment plant includes at least one membrane and a support body supporting the membrane and having gas-inlet openings. The membrane comprises a support membrane and a gassing membrane, wherein through-openings are arranged in the support membrane and continuous perforation slits are arranged in the gassing membrane and connected to the through-openings of the support membrane, or project into same, or are arranged inside the through-openings. The gassing membrane has a greater elasticity and is softer than the support membrane. The width of the through-openings of the support membrane decrease from the outer side and the gassing membrane projects partially or completely into the through-openings of the support membrane, and has a corresponding negative contour in relation to the through-openings of the support membrane.

Disclosed is a membrane bioreactor system capable of minimizing the energy consumption while guaranteeing excellent membrane cleaning effect. According to the membrane bioreactor system of the present invention, a filtration apparatus for solid-liquid separation is provided in an aerobic tank and a portion of fine bubbles supplied to increase the dissolved oxygen of wastewater introduced into the aerobic tank are used for cleaning the membrane of the filtration apparatus.

An automated frothing assembly. The automated frothing assembly has a wand module that includes an elongate member having an inlet, one or more outlets, and a fluid passageway extending between and in fluid communication with the inlet and the plurality of outlets. At least one of the one or more outlets extends parallel to a vertical plane that includes the centerline of the elongate member and at an acute angle relative to a horizontal plane that is perpendicular to both the vertical plane and the centerline of the elongate member. The assembly further includes an actuator configured to be operatively coupled to the wand module and to drive the movement of at least a portion of the wand module along an axis, and an electronic controller configured to be electrically coupled to the actuator and to control the operation of the actuator to control the movement of the wand module.

A turbine engine cleaning system includes a foaming nozzle. The foaming nozzle includes a wall having a thickness between an outer surface of the wall and an inner surface of the wall. The outer surface of the wall is configured to contact a detergent in which the foaming nozzle is configured to be disposed. The inner surface of the wall surrounds an inner plenum of the foaming nozzle, and the inner plenum is configured to receive an aerating gas. The foaming nozzle also includes a first row of first through holes fluidly coupled to, and extending between, a first row of first through hole inlets at the inner surface of the wall and a first row of first through hole outlets at the outer surface of the wall. The foaming nozzle also includes a second row of second through holes disposed axially adjacent to the first row of second through holes with respect to a longitudinal axis of the inner plenum, where the second row of second through holes is fluidly coupled to, and extending between, a second row of second through hole inlets at the inner surface of the wall and a second row of second through hole outlets at the outer surface of the wall. The foaming nozzle also includes cross-sections of the first through holes and the second through holes having regular shapes.