Deionized Water Ultrafiltration Peocessing System / Equipment With
UF Membrane 4040
Wastewater treatment
In biological products, application of ultrafiltration technique
has high economic benefit, for example for intravenous injection of
25% placental
blood albumin (white) is usually ammonium sulfate salting out,
dialysis desalting, vacuum concentration, such as process of
preparation, the
technological process of ammonium sulfate consumption of large,
energy consumption, long operation time, dialysis process easy to
produce
pollution.After the ultrafiltration process was used, the average
recovery was up to 97.18%.Adsorption loss was 1.69%.Penetration
loss was
1.23%;The interception rate was 98.77%.The yield and quality of
albumin were greatly improved, saving 6.2 tons of ammonium sulfate
and
16,000 tons of tap water per year.At present, Milipore (USA) and
Sartorius (Germany) are the most famous manufacturers of
ultrafiltration
membrane and ultrafiltration device.The well-known domestic
manufacturers have rising.
Application of ultrafiltration in wastewater treatment
(1) treatment of reduced dye wastewater;
(2) electrophoresis paint wastewater treatment;
(3) wastewater treatment containing emulsified oil;
(4) domestic sewage treatment
UF Filter
The key to ultrafiltration technology is the membrane. Membranes
come in a variety of different types and sizes and can be selected
for your
job. Early films were isotropic uniform films, commonly used
microporous films, which typically have pore sizes of 0.05 mm and
0.025 mm. In
recent years, some anisotropic asymmetric ultrafiltration membranes
have been produced. One of the anisotropic diffusion membranes
consists
of a very thin porous "skin layer" with a certain pore size (about
0.1 mm to 1.0 mm thick). And a relatively thick (about 1 mm) layer
that is more
permeable and serves as a "sponge layer" for support. The skin
layer determines the selectivity of the film, while the sponge
layer increases
the mechanical strength. Since the skin layer is very thin, it is
highly efficient, has good permeability, has a large flow rate, and
is not easily
blocked by the solute, resulting in a decrease in flow rate.
Commonly used films are generally made of acetate or nitrocellulose
or a mixture of
the two. Recently, in order to meet the needs of sterilization in
the pharmaceutical and food industries, non-fibrous directional
films such as
polysulfone membranes, polysulfone amide membranes, and
polyacrylonitrile membranes have been developed. The membrane is
stable at pH
1 to 14 and works well at 90 °C. Ultrafiltration membranes are
generally stable and can be used continuously for 1 to 2 years if
used properly.
For temporary use, it can be stored in 1% formaldehyde solution or
0.2% NaN3. The basic performance indicators of ultrafiltration
membranes
are: water flux [cm3/(cm2?h)]; rejection (expressed as %); chemical
and physical stability (including mechanical strength).
Ultrafiltration membrane Device
Ultrafiltration devices typically consist of a number of
ultrafiltration modules. Generally, it can be divided into four
main types: plate and frame,
tube, spiral and hollow fiber. Most of the liquids treated by the
ultrafiltration method contain water-soluble biomacromolecules,
organic colloids,
polysaccharides, and microorganisms. These substances are highly
adherent and deposited on the surface of the membrane, causing
severe
concentration polarization and blockage. This is the most critical
problem of ultrafiltration. To overcome the concentration
polarization, it usually
increases the liquid flow and strengthens the turbulence and
Stirring is enhanced.
UF system detail pictures
