Sulfuric acid projection in RO treatment

What is your raw water characteristics and what sort of pretreatment do you have?

If too lengthy and need attachments you may email me direct sisiraa@gmail.com

I might be able to help you

Sisira

Is there a problem with BaSO₄, CaSO₄ and MgSO₄ precipitation on the membranes? If so, it could be that H₂SO₄ is not the right additive, in which case the correct course of action is to discuss the matter in detail with the local water additives company representative. Let them solve the problem with some more esoteric potions with sight of a detailed water analysis, under a supply-and-monitoring contract, particularly for water that is destined to become potable.

There shouldn't be an immediate problem with the stated pH on the RO membranes themselves, as these days a wide range of pH can be tolerated. For potable water some form of re-hardening filter downstream will prove beneficial, partly to improve the taste, and partly to protect the downstream pipework components from dissolving.

Many membrane manufacturers have good software that we engineers use. They are very accurate and can help to predict chemical usage, but as someone has mentioned, we would need a very detailed raw water analysis, feed temperature, flow rates, and your membrane system configuration.

I can help as well and feel free to email me at: stephan@bradleyventures.com

For examples of my work, see www.bradleyventures.com

Stephan

You would use 24.5 gal. per day