TORAY UF
Instruction Manual
06-G-MB2-HFUG-B2315AN-220930
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2. Backwash and Air-scrubbing
The physical cleaning with backwash followed by air-scrubbing should be carried out
periodically and automatically for the continuous filtration. The frequency of the physical
cleaning mainly depends on the raw water quality (Typical frequency is once every 30 minutes
for the surface water filtration. Please contact us for any technical support if necessary). Fig.
5 shows a typical example of the flow diagram for backwash and air-scrubbing.
(1)
Close th
e feed water valve (V-1) and stop the feed water pump.
(2) Open the air exhaust valve (V-4).
(3) Close the filtrate valve (V-5) and open the backwashing valve (V-6) to feed back the filtrate
from the backwashing tank to the membrane module. During the backwash, the chemical
feed pump can be operated to dose chemical to the backwash water. The chemical is
Fig. 5. Flow diagram for backwash and air-scrubbing
