Manufacture of different DIDIER fine bubble air diffuser elements: ceramic and membrane, for wastewater treatment plants. Filter media: sintered ceramic, plastic and metal. Filtering devices


The fine bubble membrane diffusers are formed by a structure with thousands of micro-perforations. The generation of fine bubbles in the aeration tanks allows to obtain high levels of oxygen transfer to wastewater, making this type of diffusers very suitable for aeration in industrial and / or urban wastewater treatment plants.

The membrane diffusers (EPDM or silicone), with the air inlet, the perforations open, while when the air stops, the perforations are closed preventing water from entering the air distribution pipes. This feature allows working with intermittent aeration systems.

Systems with blowers and air diffusers have advantages over surface aeration systems:

• Electric energy saving.
• Lets take advantage of the entire depth of the reactor. The greater the installation depth of the diffusers, the greater the transfer of oxygen.

• Allows the regulation of oxygen supply, either with a manual or automated aeration control.
• Longer life than conventional mechanical aerators by being able to locate the blower room outside the corrosion area.
• Submerged air diffusers do not generate polluting spray in the plant.
• The correct distribution of the diffusers in the reactor allows the elimination of dead zones without aeration, thus eliminating bad odors.
• The diffuser aeration system allows an expansion of the aerated area by installing more diffusers.

The air diffusers can be installed fixedly or in removable modules. Fixed modules require that the reactor is empty for maintenance while removable modules allow assembly, maintenance or repair in operating plants.

It is also possible to combine the installation of submerged aerators with surface aerators, in order to increase the level of dissolved oxygen in the water. The diffusers, the implementation in any geometry that the reactor has.

The determination of the quantity of diffusers to be installed in biological reactors for large sewage plants is determined by the oxygen needs. Each diffuser provides an amount of oxygen depending on the depth at which it is installed, the air flow it provides and the type of pores it has. To have good ventilation, the density of diffusers to be installed must be taken into account. In general, there is a better oxygen transfer capacity as the deeper one installs the diffuser and the greater the quantity of diffusers m2 surface.

FINE BUBBLE CERAMIC DIFFUSERS  Ceramic diffusers are formed by a large number of pores. These diffusers allow a better operation for continuous ventilation because they have less load loss in not having to open the pores (as is the case of the membrane). These diffusers have high resistance to chemicals. Ceramic diffusers, to be resistant to temperatures up to 1000 ° C, can also regenerate by baking.
Technical sheets:

          Membrane diffuser disk.

          Ceramic diffuser disk.

          Tubular membrane diffuser.

          Tubular ceramic diffuser.


          Membrane diffuser disk.

          Tubular membrane diffuser.

          Tubular ceramic diffuser.

DIDIER FILTERTECHNIK also markets FLEXOLITH-H, which consists of a polyethylene filter medium. FLEXOLITH-H plates are mainly used in pneumatic transport and aeration of powdered and granulated products. While FLEXOLITH-H cylinders are used for the filtration of gases and liquids. Technical sheet: FLEXOLITH-H

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