An antiscalant is chosen from an analysis, not from a catalogue. The two decisive parameters, and why the projection calculation must not be skipped.
Designing a membrane system requires a detailed analysis of the raw water that will enter it. The antiscalant selection is the output of that analysis and the projection calculation built on it.
A product chosen without an analysis either falls short, and precipitation begins on the membrane surface, or is stronger than necessary and creates a permanent cost item.
The projection calculation weighs the whole analysis; but these two determine the selection more than anything else.
Choosing the right product is not enough on its own; the dose has to be set according to the projection as well. Too little offers no protection, too much raises cost for nothing and in some cases feeds biological growth.
We set the dose during commissioning and review it at periodic inspections against the system’s current data. Determining the appropriate antiscalant is one of the most effective decisions affecting membrane life.
Membrane replacement is decided by data, not by the calendar. The five indicators we look at in the field and what each of them means.
View →If hardness appears early at the softener outlet, the problem usually lies not in the resin itself but in the water reaching it and in the regeneration settings.
View →In cooling water it is usually unnecessary to filter the full flow. The points that decide between side-stream and full-stream filtration.
View →Membranes are delicate structures and the cause of fouling is not always the same. The fouling we see in the field falls into three main groups; the remedy changes with that distinction.
View →Read flow and conductivity together and they point to the source of the damage with surprising clarity. Three typical patterns and the problem each one indicates.
View →The cleaning decision looks not at the calendar but at three measurements: differential pressure, permeate conductivity and production flow. The threshold values, and what to do after a long shutdown.
View →Silica is one of the most dangerous minerals for a membrane and it occurs in water in two different forms. The precaution differs for each.
View →The short answer: yes, and irreversibly. Membranes have a low tolerance to chlorine and the damage cannot be undone by cleaning.
View →Activated carbon and SMBS dosing are the two ways of neutralising free chlorine ahead of a membrane. When to prefer which.
View →Let us size the system together; we will survey the site in person if needed.
