TORAY MBR
Instruction Manual
06-G-MB2-NHPAC-220801
21 of 61
3. Layout of “NHPA Series” Modules in Membrane Tank
(1) Layout of Modules in Membrane Tank
Fig.IV-5a shows how the liquid circulates in the membrane tank. An upward flow of liquid is
generated as the air is supplied from the air diffuser located at the bottom of the membrane
modules. This flow circulates downward along both sides of the element block.
This circulation flow serves to scour the membrane element surfaces and at the same time to
mix the activated sludge.
It is very important to arrange the membrane modules with
appropriate distances between each module to obtain an effective activated sludge
circulation, as well as not having excessive space around the modules which allows
sludge sedimentation (installing sludge agitation if necessary).
Fig.IV-5a and Fig.IV-5b illustrate a side view and a top view of the membrane tank containing
three membrane modules. It is required to adhere to the dimensions of W1, W2, W3, and L1
listed below.
Fig.IV-5a Membrane Module Layout in Membrane Tank (side view)
Fig.IV-5b Membrane Module Layout in Membrane Tank (top view)
Tank Wall
W1
W1
W2
W2
W3
W3
Module
Module
Module
W1
W2
W2
W1
Module
Module
Module
Top of elements
Liquid level
L1