Effective and safe disinfection with
Chlorine dioxide
GRUNDFOS ALLDOS Oxiperm Pro systems produce
chlorine dioxide using diluted solutions of sodium 9%).
They are available in two capacity levels, producing 5
and 10 g/h of chlorine dioxide respectively. This
capacity is sufficient to treat up to 25 m³ of drinking
water per hour at the maximum admissible
concentration of 0.4 mg/l ClO2. Chlorine dioxide is
produced on demand from diluted solutions using the
reliable sodium chlorite / hydrochloric acid, in
accordance with the German Drinking Water Directive.
The chlorine dioxide solution produced is stored in an
integrated tank and is added to the drinking water
system as required using the integrated dosing pump
or an external dosing pump.
> No THM or chloramine formation > reduction in taste and odour of chlorine
> Disinfection independent of pH value
> Multiple fields of application
Disinfection with chlorine dioxide
with the addition of chlorine dioxide. Grundfos Alldos offers
chlorine dioxide generation systems.
solutions for effective and safe disinfection: the Oxiperm®
chlorine dioxide generation systems.
The easy-to-operate Oxiperm® systems are suitable for
almost all water treatment applications requiring disinfection:
> Drinking water treatment
> Industrial waste and process water
> Cooling water and waste water
In sectors such as the food & beverage industry, where taste
& smell of the disinfectant need to be minimized, more &
more users are switching over to chlorine dioxide
disinfection. Even in CIP (Cleaning In Place) applications, the
demand for chlorine dioxide generation system is growing.

Advantages of chlorine dioxide
> The disinfection effect of chlorine dioxide is significantly
better than chlorine in the same concentration.
> Selective effect: no formation of toxic chloramines and
haloforms (THM) –> no bad smell or taste.
> High redox potential and thus very strong disinfection
(oxidation) effect.
> Compared to other biocides, chlorine dioxide has a
considerably stronger disinfection effect to pathogens
including viruses, bacteria, spores & algae.
> Higher oxidation potential than chlorine.
> Long residence time: even chlorine-resistant germs, such
as legionella, are destroyed safely and completely by chlorine
dioxide.
> Disinfection independent from the pH value > ideal for
disinfection of high alkaline pH water.
> Elimination of biofilm in pipes: deprives bacteria
(legionella) of their nutrients.
Chlorine dioxide gives legionella no chance

Problems of other disinfection methods:
temperatures.
> Excellent conditions for the increase of pathogens at
temperatures of 25°C to 45°C and a pH value of 6.9.
> At 30°C to 35°C one population can double within a few
hours.
> Most other chemical disinfectants including chemical-free
methods do not destroy biofilm.
Optimum solution with Grundfos Alldos chlorine
dioxide systems:
> The continuous addition of chlorine dioxide provides
extremely effective disinfection.
> Chlorine dioxide reduces the formation of and strips biofilm
so that legionella cannot settle. Thermal destruction of
legionella is unnecessary.
> Mobile or stationary Oxiperm® systems produce chlorine
dioxide on site.
> Oxiperm® systems offer maximum process reliability and
safety.
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