WTP Switches from UV to PAA to Disinfect Effluent

The WTP was using a UV System to disinfect its effluent. It was in good working order, but issues arose due to heavy industrial loading containing significant contaminants. The UV System was unable to reliably meet mandated disinfection requirements.
Oct. 15, 2025

Because the UV System could not adequately meet the disinfection needs, the service technician opted to make the switch to a chemical treatment solution and installed a Duplex Skid System equipped with two FLEXFLO® M3 Peristaltic Metering Pumps. The chemical chosen to deliver reliable disinfection of the wastewater is Peracetic Acid (PAA) at 15% solution under minimal pressure.

Some Benefits of PAA include the fact it is environmentally friendly. When it oxidizes, PAA breaks down into acetic acid, water, and oxygen. This makes it safer to use on effluent that is discharged into source water or other bodies with high levels of organic content. PAA oxidizes almost instantly, so there is rarely any residual chemical after discharge. For now, there are few regulations that affect the use of PAA, as it breaks down quickly and does not form any known DBPs.