PAC is not a single product, but an entire spectrum of versatile inorganic polymers. PAC's are characterized by two primary numbers: their strength (usually in % alumina, or Al2O3), and their basicity. Basicity gives a general idea of the amount or degree of polynuclear material in the PAC. At the low end of the basicity scale is ACS, with 0% basicity (which means it is not a PAC). The lowest basicity commercial PAC's are about 10%; most PAC's are in the medium to high basicity range (50-70%). At the top of the scale is aluminum chlorhydrate (ACH): at 83%, it is the highest stable basicity PAC available.

PAC's can offer a number of advantages over traditional coagulants such as alum or iron salts. Because PAC's are pre-neutralized and have a higher charge density than traditional coagulants, they coagulate via a more efficient mechanism, called charge neutralization. This allows PAC's to be effective at lower doses than alum or iron salts, when one compares the actual metal being added by the coagulant to the system. Resulting benefits can include:

Less pH depression and alkalinity depletion, reducing lime or caustic requirements

Reduced chemical sludge volumes.

Sludge density is increased.

Improved results in higher pH systems.

Better performance in cold water.

And because PAC does function so differently, there are many applications where it will provide finished water quality that the traditional coagulants can't achieve.

Leichuang Technology understands the relationships between basicity, alumina content and the way a PAC will perform. We also have the capability to produce PAC's across the entire spectrum of basicity; our standard line includes low, medium, high and maximum basicity products. Combine our applications and manufacturing expertise, and GEO can find the optimal PAC product for you. If you want to know more info about PAC, please contact us:

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