Filtration Spectrum
Liquid filtration covers a continuous range of technologies
varying from molecular filtration (reverse osmosis) to conventional
particle removal (screens and beds). Molecule separations performed
with semi-permeable membranes may utilize charge effects, osmotic
characteristics, variances in specie solubility, surface tension,
and other thermodynamic and chemical effects to achieve the
desired separation. Conventional filters exploit the geometric
characteristics of particles and screens to prevent the passage
of particles but allow the passage of liquids. The intermediate
filtration technologies, including nano-filtration (NF), ultra-filtration
(UF), and micro-filtration (MF), can rely on combinations of
both geometric and thermodynamic mechanisms to achieve the
separation.
For example, reverse osmosis membranes are routinely used
to convert seawater and brackish water to potable status. Nano-filters
and ultra-filters that remove larger molecular species are
routinely used to eliminate unwanted constituents from our
tap water. Micro-filtration is an increasingly common industrial
filtration method for improving chemical and petroleum processes.
As the separated specie becomes smaller, the capacity of a
given unit of filtration area (whether RO, NF, UF, or conventional)
usually decreases, and the driving energy that effects the
separation (generally pressure) increases. These factors profoundly
affect system costs. Careful selection of the filtration type
is necessary to produce an economical result.
T&T Solutions offers access to this technology and the
test equipment needed for the application development that
can enhance your processes. |
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