DAYLIFF BUF 4, Installation & Operating Manual

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3. OPERATION
3.1 Pre Treatment
Ultrafiltration membrane designs are based on qualified feed water conditions as shown
in table above. If the feed water quality is outside of the required levels, a pilot study should
be done to confirm performance, increase the number of UF membranes to lower
filtration flux or pretreatment must be considered.
Depending on application, a safety screen of 150 – 300 microns is recommended on the
feed to the UF system, which must be frequently cleaned at least once a day depending on
If the system is designed and installed to the conditions shown
but the feed water quality is not maintained as required, then
consult a Dayliff retailer.
WARNING
Depending on application, a safety screen of 120 microns is recommended on the feed to
the UF system, which must be frequently cleaned at least once a day depending on the
quality of water. A variety of technologies can be used such as self-cleaning screens and
bag, cartridge, or disc filters. Depending on the type of water or range of feed water
parameters other pretreatment technologies such as oxidation, coagulation, and
sedimentation and media filtration may also be recommended.
3.2 Filtration & Flushing Process
Fig 3: Filtration Step for UF membrane
Solenoid
Inlet
Valve
Feed
Pump
Controller
Solenoid
Inlet
Valve
Solenoid
Flush
Valve
B/Wash
CIP
Tank
100LT
Drain
120 Microns
Strainder
FILTRATE
Solenoid
Drain
Valve
To Drain
Dayliff UF Membrane
Filtration
Ÿ Inlet solenoid valves open|flush solenoid valve closed|Drain
solenoid valve closed
Ÿ Settable timer settings - 30min*
Ÿ
Flush tank filling until full
Ÿ Monitor differential pressure (feed pressure filtrate pressure
should never be more than 2Bar
Ÿ Regular cleaning of feed line screen filter every week or
sooner