dechlor chart

Graph: Medium pressure UV provides high intensity UV light at wavelengths ranging from 200 to 400nm, ideal for the destruction of free chlorine species HOCl and OCL-.

Hanovia’s Medium pressure UV lamp technology delivers guaranteed high UV dose for effective dechlorination and enhanced disinfection, perfect for many industrial applications including beer and soft drinks production. In addition, UV dechlorination protects RO membranes and ion-exchange technologies from residual chlorine and risk of bio-fouling.

Protecting Water Treatment Technologies

Hanovia’s UV Dechlorination systems provide a clean, efficient alternative to other Dechlorination methods for the protection of the key water treatment technologies such as Reverse Osmosis and Deionisation. Hygienic applications such as Pharmaceutical, Cosmetics and Beverage manufacturing desire clean water treatment technologies which have minimal bacteria build-up, low frequency of system down-time and optimised running costs.

Hanovia UV dechlorination systems reduce free and total chlorine in process lines to levels below the requirement for RO and DI / EDI.

Technology Comparison

High Dose UV System

Activated Carbon Filter

Sodium Metabisulphite

Dechlorination Effectiveness




Bacterial Contamination

Zero – High dose UV kills micro-organisms

High Risk – high surface area nutrient source

Possible growth of sulphur metabolizing bacteria

Chemical Addition

Zero – Chemical-Free

Zero – Chemical-free

Yes – increases load on downstream technologies

Water Consumption


High – Frequent backwashing and Sanitisation

Low – Chemical tank make-up, CIP

Impact on RO membranes

Zero – Bio-fouling significantly reduced

High – Significant bio-fouling, increases particulate loading

Medium – increased chemical loading

Continuous Operation


Weekly down-time for back-washing, frequent SIP

Yes – as long as chemical tank is replenished

Maintenance Impact

Low – Infrequent lamp replacement

6 monthly media replacement

Daily checks on chemical levels





The Best, Cleanest Dechlorination Technology

Hanovia UV dechlorination provides distinct advantages over traditional technologies such as Activated Carbon bed filtration (AC) and Sodium Bisulphite dosing (SBS) which are proven chlorine removal technologies however are prone to potential microbial contamination and require significantly more operator involvement and plant-room space leading to higher lifetime costs.

Why Choose UV…

  • AC provides a breeding ground for bacteria and requires regular heat or chemical sanitisation to maintain microbial control.
  • AC needs media replacement, incurring significant cost.
  • SBS requires regular chemical handling and introduces a higher loading onto the downstream RO membranes
  • Both AC and SBS have a significant footprint occupying valuable factory space, which may be particularly important for skid mounted equipment.

Dechlor process map

Find Out More

For more information on your Return On Investment using Hanovia’s medium pressure UV lamp technology please complete the form below:

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Key Issues