The reverse osmosis is the thinnest filtration technique used in the cross-filtration systems.
This technique retains all the dissolved salts, the organic molecules bigger then 10-7mm and the monovalent salts. The working pressure goes up to 80 bars.
The reverse osmosis is a separation technique which allows extracting pure water from a saline solution by diffusion through a thick membrane.
A pre-treatment is compulsory in order to avoid clogging from suspended elements or chemical precipitations.
CHARACTERISTICS
- lowest molecular weight cutoff
- working pressure up to 80 bars
- retains molecules and monovalent salts | |
SOME APPLICATION FIELDS OF THE RO
Food-processing industries:
- coffee, fruits, vegetables effluents concentration
- dealcoholisation
- draining juices purification and concentration
- effluents pre-concentration
Dairy products industry:
- whey and skimmed milk concentration
- milk concentration
Effluent treatments :
- treatment and pre-treatment of the blanching/bleaching water
- sewage recycling
- recycling and separation of rinsing water
- effluent concentration and pure water recycling
- desalination of seawater
- treatment of radioactive effluents
- abatement of COD, pollution index, BOD (Biological Oxygen Demand) |
 |  | | | CHARACTERISTICS
- transfer mechanism : solubilisation type
- lowest molecular weight cutoff
- working pressure up to 80 bars
- retains some Angstrom-molecules (10-7 mm) and the monovalent salts | APPLICATION FIELDS
- whey and skimmed milk concentration
- effluent treatments
- water production |
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Filtration Process 
