Reverse osmosis system
AVRO 125 TS/TL
Order no. 185 752 945-inter Edited by: nkes-mrie :\BA-752945-INTER_185_AVRO_125.DOCX
9
3 | Functional principle of reverse osmosis
Principle:
Pretreated
feed water
Concentrate:
Permeate
Fig. B-1: Functional principle
Osmosis
Osmotic pressure
Reversed osmosis
Solution of
high
concentration
Solution of low
concentration
Solution of
high
concentration
Solution of low
concentration
Solution of
high
concentration
(concentrate)
Solution of low
concentration
(permeate)
Fig. B-2: Reverse osmosis principle
In the osmosis process, aqueous solutions of different
concentrations are separated by a semi-permeable
membrane. In keeping with the law of nature, the
concentrations will tend to equalise. What is referred
to as "osmotic pressure" is generated on the side of
the higher original concentration.
In case of reverse osmosis, this osmotic pressure is
countered by a higher pressure. The consequence:
The process runs in the opposite direction.
A particular advantage of the reverse osmosis
technology compared to other water treatment
processes is the fact that apart from the removal of
dissolved salts, bacteria, germs, particles, and
dissolved organic substances are also reduced.
