A method for processing a fluid includes removably securing a retention member to a vessel that bounds a chamber; inserting a collapsible bag within the chamber of the vessel; securing the bag to the retention member so that the bag is supported within the chamber of the vessel; and dispensing a fluid into a compartment of the collapsible bag supported within the chamber of the vessel. The fluid can be mixed within bag while the bag is disposed within the vessel.

A wall-mounted, retrievable diffusor system for aerating water in a tank includes a guide rail assembly mounted to a tank wall and extending from the tank floor to an upper edge of the wall; a retrievable mounting frame assembly releasably mounted on the guide rail assembly; and a plurality of aeration elements secured to the retrievable mounting frame assembly. The retrievable diffusor system is configured to be raised or lowered into or out of the tank either manually or via a motorized winch. In one aspect, the diffusor system includes guide rollers for guiding the mounting frame along a central guide rail. Swivel rollers engage the central guide rail and enable the mounting frame to be pivoted out of a position perpendicular to the tank wall and into a position over a platform of the tank for maintenance or replacement of the aeration elements when the frame is pulled from the tank.

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.

The invention relates to a ventilation element for the introduction of a gas into a liquid, having at least one gas port, having at least one carrier plate and having at least one elastically deformable diaphragm which is connected to the at least one gas port and/or to the at least one carrier plate. A space that can be formed between the at least one diaphragm and the at least one carrier plate is connected in terms of flow to the gas port. The at least one carrier plate has a multiplicity of gas outlet openings, and at least one diaphragm is composed at least in sections of a material with a lower density than water, or is equipped with at least one float body which has a lower density than water.

A bubble-generating apparatus comprises: a casing defining a casing bore extending longitudinally therethrough; and a diffuser located in the casing bore, the diffuser defining a diffuser bore extending longitudinally therethrough. The diffuser bore comprises a fluid-input region at or near a fluid-input end of the diffuser and a fluid-output region at or near a fluid-output end of the diffuser. A cross-sectional area of the diffuser bore in the fluid-input region is greater than the cross-sectional area of the diffuser bore in the fluid-output region. At least a portion of the diffuser is porous for permitting a flow of pressurized gas from a region of the casing bore located outside of the diffuser bore, through the porous portion of the diffuser and into the diffuser bore.

A container assembly includes a flexible bag having an interior surface bounding a chamber and an opposing exterior surface. The bag has a bottom end wall that includes a first sparger and a second sparger. The first sparger and the second sparger each have a flexible first sheet overlying a flexible second sheet, the first sheet and the second sheet being secured together so as to form a sparging area bounded between the first sheet and the second sheet, at least a portion of the first sheet overlying the sparging area being gas permeable so that gas can pass from the sparging area, through the first sheet, and into the chamber.

The invention relates to an aeration system for seawater oxidation in flue gas purification devices, with at least one tubular diffuser (TD), covered by at least two perforated membranes (20), which are positioned one after the other and at a distance to each other in a direction of the central longitudinal axis (A) of the diffuser (TD) as well as at least one support member (SP), which encircles a membrane-free section (FS) of the tubular diffuser at least partially, and at least one sliding means (40), arranged between the support member (SP) and the membrane-free section (FS) of the tubular diffuser (TD).

The present invention provides modular devices and systems for infusing gas into a liquid and methods of manufacture and use thereof. In accordance with an embodiment, a modular device for infusing gas into a liquid is provided. The modular device comprises a plurality of microporous hollow fibers, and a cap covering open ends of the microporous hollow fibers. The cap is configured to receive a gas into an opening and to deliver the gas into the open ends of the microporous hollow fibers. The cap is further configured to removably mount the modular device to a fixture. A system for infusing gas into a liquid may include one or more of the modular gas infusion devices configured to be removably mounted to a fixture such that the microporous hollow fibers are within a hollow cavity. The hollow cavity includes a first opening configured to receive a liquid and a second opening configured to discharge the liquid infused with a gas. Because the system is modular, it is economical to manufacture, scale to different application requirements and to maintain.

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.

A specific resistance value adjustment apparatus includes: a hollow fiber membrane module; a module passing pipe which passes through the hollow fiber membrane module; a bypassing pipe which bypasses the hollow fiber membrane module; a liquid discharge pipe which communicates with the module passing pipe and the bypassing pipe through a joint portion; a first flow rate detection unit which detects a first flow rate of a liquid flowing to at least one of a liquid supply pipe and the liquid discharge pipe; a control valve which opens and closes the module passing pipe; and a control unit which sets an opening degree of the control valve in response to the first flow rate detected by the first flow rate detection unit.