Ultra Filtration
Separation from particles with a size of 0,001 till 0,1mm.
Vanderwaalsforces
The weak molecule-to-molecule forces which cause a small particle
to adhere to a surface.
Pollution
Everything what is in a wrong place.
Active carbon
Porous active carbon is used for the removing of taste, smell,
chlorine and some organic compounds out of water.
Bacteriostat
Substance which submerges bacterial growth and metabolism but does
not kill the cel.
Cake
The accumulation of solid particles in the medium, the surface of
the filter.
Cartridge filter
A filter, which filters with an range of 0.1 micron till 100
micron and usually with a diameter of 51 tillt 102 mm and a length
of 152 tot 1524 mm.
Cloth
A type of woven filtermedium, made from natural or synthetical
sources, like yarn.
Coagulant
Chemicaal toegevoegd aan water en afvalwater in de waterzuivering
om tot de formatie van vlokken te komen die worden geadsorbeerd,
ingesloten of op andere wijze samen gebracht en gedefineerd als
colloïden.
Colloid
A substance of realy small particles with a diamter between the
0,001 and the 0,1 micron solved in a fluid or in a compressed gass.
Colloid only can be removed by reversed osmosis, distillatie and
ultrafiltration.
Conductibility
The ability of a substance to conduct electric power.
Resistance
The ability of a substance to stop an electric power.
Filtermedium
The permeable material which separates particles from a
fluid.
Filtrate
A fluid which passes the filtermedium.
Flux
In crossflow filtration, the unit membrane througput, expressed in
volume per time-unit per surface.
Fouling
At crossflow filtration the reduction of flux is caused by an
accumulation of particles on the surface of the membrane.
Hardness
The concentration of calcium- en magnesiumsalts in water.
Micron
A metric unit, 10^ -6 meter, 10^ 4 centimeter. The symbol that is
used for is mm.
Nanofiltration
A crossfiltrationmembrane which separates particles with a weight
range of 250 till 1000 micron, selected salts and most of the
organic compounds.
Permeable
Able to let particles through.
Pore
An opening in a membrane or filtermatrix.
Porous
The ability of some solid substances to let fluids through regarding an
open structure.
Resin
Special manufactured polymer; application in ionexchangers to remove
salts.
Septum
A membrane.
Backwash
Reversed flow through a filtersystem which is commenly used for
the cleaning of mechanisms in sandfiltration.
