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IV.
MEMBRANE FILTRATION PROCESS DESIGN FOR “TMR140 Series”
The standard filtration pattern time chart, the schematic flow diagram of the membrane
filtration, the layout of “TMR140 Series” modules in the membrane submerged tank, and the
piping procedures are described in this section. These would help you design the membrane
filtration process with “TMR140 Series”.
1. Standard Time Chart
Two kinds of the filtration patterns are available with "TMR140 Series". One is the simple
continuous filtration. And the other is the filtration with relaxation, that is the intermittent
filtration.
In the case of the intermittent filtration, the filtration is suspended for a short period at certain
intervals while the scouring air continues, as shown in Fig.IV-1. While the filtration is
suspended, the membrane surface is cleaned up more effectively with the scouring air due to
the absence of suction. Although the automatic system control for periodical start and stop of
the filtration is required, the intermittent filtration would be recommended if you need higher
filtration flux.
The recommended time cycle for the intermittent filtration is 9-minute filtration
and 1-minute suspension
Fig.IV-1 Recommended Time Chart for Intermittent Filtration
2. Flow Diagram of Membrane Filtration
Two schematic flow diagrams of the membrane filtration process are shown below. One is for
the filtration with natural water head and the other is with suction pump. And some
explanation is added for the devices used in the membrane filtration process in the latter part
Filtration
Air diffusion
Contenuous
Filtration
Suspension
Cycle of 10 minutes
9 min.
1 min.
