Raw Water

Raw water treatment removes chlorine-resistant Giardia and Cryptosporidium to meet the requirements of the Surface Water Treatment Rule. The Pall Aria™ system’s 0.1 μm membranes eliminate the need to add chemicals to coagulate these contaminants.

Performance data show that the Pall Aria system achieves a 6 log reduction of Giardia and Cryptosporidium, with recovery rates that vary from 90-97%, depending on the quality of your influent water. (Refer to the following table.)

Typical performance data for Pall Aria Systems processing raw surface water

Avg turbidity (NTU) TOC avg mg/L Flux (gal/day/ft2) Recovery (%)
<20 <3 75 97
<50 <5 53 94
Up to 100 >5 32 90

Nephelometric turbidity unit (NTU) is the unit of measure for the size or concentration of suspended particles based on the scattering of light transmitted or reflected by the medium.

Total organic carbon (TOC)represents the average number of organic particles per liter of water processed.

Flux is a measure of the flow rate in gallons per day per square foot of membrane.


Process flow using Pall Aria system to treat surface water

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