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Updated 2002/01/01 PM 11:01:05
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Types of Fine Bubble Diffusers
There are four general types of fine bubble diffusers on market Plates, Tubes, Domes and Discs. We will introduce each one below:
The original fine bubble diffuser was a flat rectangular ceramic plate. These plates are usually 30 cm square and 25-38 mm thick. They are made of glass-bonded silica or ceramically-bonded aluminum oxide and aluminum silicate.
Fine bubble ceramic plates were used almost exclusively as the method of air diffusion in early activated sludge unit. Some troubles cause its decline in popularity. The reasons is as following:
a. inconvenience of removing plates that are cemented in
b. Difficulty in adding diffusers to meet future increases in
Recently-developed plate new design is ceramic and porous plastic media options. Both the ceramic and plastic media are mounted on top of vacuum-formed ABS plastic plenums.
30 cm X 61 cm and 30 cm X 122 cm ceramic and porous plastic plate
diffusers are not attached to the basin floor.
For the flexibility afforded by their individual rubber air feed
hoses, they can be moved. Inconvenience
configurations were already modified in new design.
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