Because it does not promote the formation of TTHM or HAA disinfection byproducts (DBP), chlorine dioxide is ideal for pre-oxidation of surface water for drinking water applications. Chlorine dioxide oxidizes iron and manganese, is effective over a wide pH range, and does not react with ammonia. It is used for Legionella control, membrane pre-treatment and biofouling control, algae control, and treatment of ammonia-rich waters such as fish farming. De Nora offers a range of systems under vacuum or under water, which ensures the safe operation of the systems.
Capital Controls® Chlorine Dioxide Generators
For generations, the Capital Controls® name has been synonymous with disinfection* in water treatment. With hundreds of chlorine dioxide generator installations around the world, De Nora has leveraged that expertise, developing the next stage in chlorine dioxide production - a modern, flexible, and safe line of chlorine dioxide generators
Why Choose Capital Controls Chlorine Dioxide Generators for Contaminant Removal Applications?
The Capital Controls G50 series generators use commercially available chlorine gas and 25-31% sodium chlorite to produce up to 2,500 PPD (50 kg/h) of chlorine dioxide on a single skid for water treatment, making it ideal for applications where chlorine gas is used for primary disinfection.
The Capital Controls T70 series generators use commercially available 31% hydrochloric acid and 25-31% sodium chlorite to produce up to 529 lb/day (10 kg/h) of chlorine dioxide for water treatment, without requiring chlorine gas or sodium hypochlorite (bleach).
New to the family are the ISIA L and U type underwater chlorine dioxide generators. These systems combine hydrochloric acid and sodium chlorite in a reactor that is submerged under water to ensure superior safety, with output that can be injected directly into a pressurized pipe or water basin.
- • Expertise: De Nora, through the Capital Controls brand, and De Nora ISIA have wide ranging experience, especially in the Middle East, where the underwater design is the chlorine dioxide (ClO2) system of choice.
- • Safe Design: Chlorine dioxide is generated on demand, and reagents are mixed under water and injected directly into the water being treated. ISIA chlorine dioxide generators minimize disinfection byproduct formation.
- • Effective & Reliable: In-line dosing of chlorine dioxide offers efficient consumption of chemical precursors with 5.7 kg HCl per 1 kg of ClO2 generated and a production yield of 95-98%. Underwater design treats up to 50,000 m3 of water per hour based on a ClO2 concentration of 0.4 mg/L, with standardized production capacities from 0.5 to 20 kg/h and engineered solutions from 60 g/h to 100 kg/h of ClO2.
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*De Nora manufactures devices for the in-situ production of disinfectants. Disinfectants can only be manufactured, placed on the market and used in the European Union exclusively on the basis of an authorization issued under Regulation 528/2012 and/or under the national legislation in force in each Member State. Contact De Nora to receive more information on regulatory compliance status of the specific equipment in your region.