The invention relates to a strip aerator (1) for airing or gassing liquids, comprising an elastically deformable upper film section (3) having openings (6) for forming a flat membrane, and a through-opening (19) for the passing of a gas out of an inlet channel (21) into a gas-guiding chamber (5, 5a) that is bordered at the top by an upper film section (3) and at the bottom by an elastically deformable lower film section (4), the chamber being free from supporting bodies and/or supporting structures, the lower film section (4) being gas-tightly connected to the upper film section (3) such that an elastically deformable body is formed that is gas-tightly enclosed at the top and bottom by the film sections (3, 4), where lateral receiving regions (15) run at least at opposing sides (SL, SS) of the strip aerator (1) for connecting the strip aerator (1) to a retaining element (2), at least one of said film sections (3, 4) being connected to first securing means (8, 9) running, in certain regions or continuously, at least on those receiving regions (15).

The invention provides for the first securing means (8, 9) to be designed as a rod- or strip-shaped piping (Keder) (10) and having a round, oval, rectangular or square cross-section, or designed as mounting rails (11a, 12a) in the shape of a C profile or a piping profile (13).

An elongate diffuser (10) comprises a diffuser body (30), and a membrane (20) attached so that introduction of gas at a working pressure into the diffuser displaces part of the membrane (20) from contact with the diffuser body (10) providing an elongate sealed compartment (50) between the membrane (20) and a surface (32) of the diffuser body (30). The gas can pass from the compartment (50) through the membrane (20) for aeration of fluid in which the diffuser (10) is immersed. The diffuser body surface (32) which bounds the compartment (50) is recessed away from the membrane (20) in use, to contribute to the lateral cross sectional area of the compartment (50) and facilitate distribution of gas along the diffuser by the compartment (50). An automatic purge valve for purging water from a gas feed pipe of a diffuser is also disclosed.

Systems and methods for aeration and mixing processes are disclosed.

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.

Systems and methods for aeration and mixing processes are disclosed.

An elongate diffuser is disclosed comprising a diffuser body and a membrane attached to the diffuser body. The membrane is connected to the diffuser body so that introduction of gas at a working pressure into the diffuser displaces part of the membrane from contact with the diffuser body to provide an elongate sealed compartment between the membrane and a surface of the diffuser body. The compartment has a first lateral side interface region where the membrane contacts the diffuser body, a laterally intermediate region where the membrane is spaced apart from the diffuser body and a second lateral side interface region where the membrane contacts the diffuser body. The diffuser body surface which bounds the compartment comprises a recessed portion which is recessed away from the membrane between the first second lateral side interface regions.

There is a standpipe arrangement for holding and for supplying gas to aerators in a clarifying basin. The standpipe arrangement comprises a pipe conduit with holding means for aerators, with gas openings to the aerators and with means of fastening the pipe conduit on the base of the clarifying basin. The pipe conduit comprises several support pipes connected to each other, at the connection points of which fastening means are arranged. By way of the fastening means the support pipes are fixed both at a distance above the base of the clarifying basin as well as laterally and against rotation about the pipe axis, but can be moved along the pipe axis.

Aspects of the invention describe a tube diffuser design and associated saddle design that allow the two elements to be easily and quickly attached to each other in the field for the purpose of aerating wastewater. The tube diffuser is cylindrical and includes a gas distribution section spanning across an interior diameter of the tube diffuser. The saddle includes a pair of engagement arms that are able to couple to this gas distribution section of the tube diffuser. Once the tube diffuser is attached to the saddle and the assembly is submerged in wastewater, the saddle may be used to transport air from an air distribution pipe to the tube diffuser. The air may then be made to leave the tube diffuser as a plume of air bubbles.

A method for aerating water in a treatment basin includes positioning at least one bridge above an upper surface of the water in the basin; providing a retrievable mounting frame assembly; securing a guide rail assembly to the bridge; transporting the mounting frame assembly on a transport device to a selected position on the walkway near the guide rail assembly; securing a transfer crane to the walkway proximate the guide rail assembly; transferring the mounting frame assembly from the transport device for connection to the a one guide rail assembly; connecting the mounting frame assembly to the guide rail assembly to provide a supply of air to the first air distribution conduit; moving the retrievable mounting frame assembly from a first position above the upper surface of the water to a second position below the water; and initiating a flow of air to the first air distribution conduit.

A method for aerating water in a treatment basin includes positioning at least one bridge above an upper surface of the water in the basin; providing a retrievable mounting frame assembly; securing a guide rail assembly to the bridge; transporting the mounting frame assembly on a transport device to a selected position on the walkway near the guide rail assembly; securing a transfer crane to the walkway proximate the guide rail assembly; transferring the mounting frame assembly from the transport device for connection to the a one guide rail assembly; connecting the mounting frame assembly to the guide rail assembly to provide a supply of air to the first air distribution conduit; moving the retrievable mounting frame assembly from a first position above the upper surface of the water to a second position below the water; and initiating a flow of air to the first air distribution conduit.