What are alum and ferric chloride?

Alum and ferric chloride are two widely-used “commodity chemical” coagulants that have been around for a long time. Why are alum and ferric chloride so commonly used? Some water treaters simply aren’t aware of alternative products.

How are alum and ferric chloride used in water treatment?

As every water treater knows, coagulants are used in the first step of water treatment; they destabilize the water so micro flocks can begin to form. This is followed up by a polymer, which turns it into a larger flock by creating a bigger charge.

What is a good replacement for a ferric chloride water treatment plant?

Alternatively, if a water treatment plant is using ferric chloride, a recommended replacement product is ATS 806. This product is not only a successful replacement but also offers a much better quality of water for the same dollars spent. ATS 806 removes much more total organic carbon than either alum or ferric chloride.

Are alum and ferric chloride coagulants better?

To the rare water treater who has perfect water, congrats! To the vast majority of water treaters, who struggle with meeting required levels for TOC and DBPs, there are likely better solutions for your plant than alum and ferric chloride. Alum and ferric chloride are widely-used commodity coagulants.

Can polyaluminum chloride be used to clarify samples from Iraqi river water?

tory-produced polyaluminum chloride (P AC) were used to clarify samples taken from Iraqi river water. powder. The results after raw water treatment showed that the dosage of P AC required for treatment was case of much higher turbidity. The application of PAC produced rapidly forming flocs and more com- pact sludge compared to that of alum.

Are alum and ferric chloride competing products?

The companies that supply alum and ferric chloride aren’t advertising competing products, and the companies that do sell alternative products struggle to get the word out. While not an exhaustive list, here are some important positives and negatives to consider about these chemicals: