Download Présentation PowerPoint

Separation in a liquid medium?
Orelis Environnement SAS
382, avenue du Moulinas
30340 Salindres
France
Phone : +33 (0)4 66 85 95 36
Fax : +33 (0)4 66 30 77 59
[email protected]
www.orelis.com
Microfiltration, ultrafiltration, nanofiltration and reverse osmosis can be defined as
crossflow separation processes in liquid phase by permeation through membranes
under the action of a pressure gradient.
Membrane acts as a barrier between two media. It allows some mass transfer and not
allow others or, less restrictive, in some favors.
These processes can be considered as filtration processes in a liquid medium that
implement the membranes with pore diameters gradually decrease the micrometer (1
mm = 10-6 m) to nanometer (1 nm = 10-9 m) in the transition microfiltration,
ultrafiltration, nanofiltration and then, finally, to reverse osmosis.
Page 2
Information given for educational
SW001 – Separation in a liquid medium
D
L
E
Extracts of the C.E.A. review
Plane Pleiade®
Spiral wound
Persep™
Ceramic
Kleansep™
Orelis Environment provides
the full range of membranes
Information given for educational
SW001 – Separation in a liquid medium
D
L
E
Page 3
Pore diameter
Typical retention
Reverse Osmosis
Nanofiltration
Ultrafiltration
Microfiltration
< 0.5 nm (*)
~1nm
1 – 100 nm
0.1 – 10µm
Salt
small molecules
(molecular weight
below 300g/mol)
Macromolecules
colloids
Particles colloids
See cut-off
Page 4
Information given for educational
SW001 – Separation in a liquid medium
D
L
E
Extracts of the C.E.A. review
Organics Macromolecules
Organic compounds
Colloid, emulsions
Bacteria
Virus
Dissolved salts
Yeast
10
microns
1
0,1
0,01
0,001
0,0001
Salts
Bacteria
Virus
Reverse Osmosis
PERSEP™
Nanofiltration
KLEANSEP™, PERSEP™
Microfiltration
KLEANSEP™, PERSEP™
Ultrafiltration
PLEIADE®, PERSEP®, KLEANSEP™
Page 5
Information given for educational
SW001 – Separation in a liquid medium
D
L
E
Red blood cell