Chlorine dioxide
Controlled disinfection with chlorine dioxide
Chlorine dioxide as compared to chlorine and many other disinfection techniques, a large number of advantages:
It has a higher oxidizing power than chlorine and can thus also to those substances, as well as bacteria, spores and viruses that affect the chlorine no longer be attacked.
The sporicidal and virucidal effect of chlorine dioxide is better than at the same concentration of chlorine.
The formation of unwanted or harmful Trihalomethanes (Haloforms) avoids the use of chlorine dioxide.
Unpleasant odor and taste compounds in water, for example, derived from phenols, algae or their decomposition products are oxidized by chlorine dioxide and converted into odorless and tasteless substance.
The Keimtötungsgeschwindigkeit of chlorine dioxide increases, in contrast to the chlorine with increasing pH value does not.
With ammonium or amino compounds, chlorine dioxide is not making any response. This is a significant difference compared to chlorine, which forms with ammonium bound chlorine (chloramines), which has a negative influence on the disinfection of the treated water have.
Chlorine dioxide is very water resistant. After completion of victuals, a surplus can be maintained over time, so that can be maintained even with extensive pipe systems and tanks, a surplus and thus a recontamination of the water effectively.
Substituting chlorine dioxide for disinfection, it must be after completion of treatment (drinking water regulations, a residual content) of at least 0.05 mg of chlorine dioxide per liter of drinking water be certified if we can keep accurate and fully automated with the Chlordioxidmessgerät.
For chlorite, the reaction product that arises in the use of chlorine dioxide, but there is currently no official determination procedures. For the permitted addition of chlorine dioxide is 0.4 mg / l, the limit after treatment is 0.20 mg / l ClO2. The limit for regressed chlorite in drinking water is 0.20 mg / l.
As the chlorine dioxide limit (water regulation) of 0.20 mg / l by selective measurement of Chlordioxidmessgerätes can be strictly adhered to, it is chemically impossible to exceed the Chloritwert of 0.20 mg / l. Even with the full transformation of the chlorine dioxide to chlorite.
While often used in combination with chlorine dioxide was used for water disinfection, is now almost everywhere only chlorine dioxide used alone. This is already happening in the drinking water suppliers, such as the Düsseldorf city works that use chlorine dioxide disinfection for protection. Due to the high Respiration by the biomass in the kilometer systems reach the consumer usually does not disinfect concentrations of chlorine dioxide to its own pipeline system.
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