The HOD MP UV system effectively removes Free Available Chlorine (FAC) by targeting both forms present in water—hypochlorous acid (HOCl) and hypochlorite ion (OCl⁻), each with unique absorption characteristics. At pH levels below 7, the process will require more UV energy for breakdown. As pH rises, the process will require less UV energy for breakdown.

The broad spectrum of wavelengths emitted by HOD medium-pressure UV lamps enables efficient removal of FAC by breaking chemical bonds in both HOCl and OCl⁻, regardless of the water’s pH level.

The result is identical to the GAC and SBS which is Cl-, achieved in a more reliable, efficient and environmentally friendly method.