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Complete Filtration Resources Inc.
offers four different
types of filtration processes,
which are listed below:
What is Crossflow
Filtration? Crossflow
filtration is a procedure
whereby liquid is filtered
through a porous membrane
while the feed solution flows
rapidly across the surface of
the membrane.
Rapid crossflow causes
turbulence at the surface of the
membrane, which serves to keep the
membrane from becoming plugged. As
a result, a large volume of
solution can be filtered in a
short period of time.
Crossflow filtration is per-
formed using all types of
membranes. RO membranes have the
smallest pores and ideally permit
only water to pass through. NF
membranes are slightly more open
than RO membranes and permit small
molecules of less than 250-500 Da
to pass through the membrane. UF
membranes have very small pores,
ranging in size from 1,000 Da to
1,000,000 Da molecular weight
cutoff (MWCO). MF membranes have
pores ranging in size from 0.01 µm
to 8.0 µm.
Crossflow filtration is often
referred to as tangential flow
filtration because the feed
solution flow is tangential to the
surface of the membrane. The
clarified solution is termed the
filtrate or permeate. The
concentrated solution that exits
the membrane device is termed the
concentrate.
Reverse Osmosis -
This process uses
a membrane which permits only
water to pass through. Some small
molecules with water like
properties (such as ethyl alcohol)
may also pass
read
more...
Ultrafiltration - This
process uses a membrane with a
Molecular Weight Cutoff range
between 1000 and 1,000,000
Daltons. It is used primarily to
concentrate
read more...
Microfiltration - This
process uses
a membrane with a pore size in the
range between
0.1
and 5 microns. It is used
primarily for solution
clarification, bacteria removal
read more...
Nanofiltration -
This process uses a membrane with
a Molecular Weight Cutoff range
between 150 and 1000 Daltons. It
functions as a loose or leaky RO
membrane
read
more...
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