AIRE-064-1-4
3
(1) Shape of Element
The membrane element is a flat sheet type as shown in Fig.I-4. At the normal filtration
operation, the sludge accumulated on the membrane surface is cleaned up effectively with
upward water stream generated with the scouring air supplied from the air diffusers installed
at the bottom side (Fig.I-5). This mechanism ensures stable filtration, since the membrane
does not easily admit of sludge adherence to its surface.
In addition, thanks to the long element design (1.6 m), a larger membrane area is achieved
per footprint, allowing effective use of diffused air.
Fig. I-4 Structure of Element
Fig. I-5 Filtration Principle of Activated Sludge
Supporting panel
Permeated Water
Nozzle
Membrane
1.6 m
0.5 m
Air
Element
Supporting
panel
Membrane
Permeated
water
Activated sludge particle
Membrane
Air
