Blog – articles about water treatment and more

FreeFlow GREEN - the green antiscalant

Modern antiscalants are subject to the DIN EN 15039 standard for polycarboxylic acids and the DIN EN 15040 standard for phosphonic acids when it comes to their use in the treatment of drinking water by membrane systems.

In addition to the requirements for drinking water production, another requirement profile for the antiscalant can be its biodegradability.


Antiscalants - history and mode of action

The first commercial membranes were made of cellulose acetate. An acidic pH in the feed prevented the membranes from degrading. The acidic pH also prevented calcium carbonate deposits in the concentrate.


Water treatment semipermeable membrane, (reverse) osmosis

In the simplest definition, a semipermeable membrane is said to exist when the membrane allows the solvent, but not the solute, to pass through. More generally, only molecules below a certain molar mass or colloids or particles below a certain size are allowed to pass through.