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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 normally for surface water filtration. Please
contact us if you need technical support.). Fig. 4 shows a typical example of
the flow diagram for backwash and air-scrubbing. Do not carry out the
backwash and the air-scrubbing simultaneously since it may damage the
membrane.
(1)
Close the feed water valve (V-1) and stop the feed water pump.
(2)
Open the air exhaust valve (V-4).
(3)
Close the filtrate water valve (V-5) and open the backwashing valve (V-6) to
Fig. 4 Flow diagram for backwash and air-scrubbing
