Versatile Disinfectant

Chlorine dioxide (ClO2) is a broad-spectrum disinfectant that inactivates spores, viruses, fungi and algae over a wide temperature and pH range. This versatile disinfectant can be used as a primary disinfectant in potable water as it has superior disinfection capabilities versus chlorine and through its selective chemistry reacts quickly to oxidize the organic load in surface water.

Unlike chlorine, ClO2 does not react with the contaminants to form trihalomethanes (THMs) or haloacetic acids (HAAs) in any appreciable amount nor does its use form any bromate, which is a concern when using ozone. ClO2 also oxidizes iron, manganese, algae and bacteria that produce poor quality water in the form of bad taste, odor and color. ClO2is excellent at destroying odor-causing biofilms that attach to piping and basins.

Why Use Chlorine Dioxide?

ClO2 is one of four approved disinfectants for use in drinking water by the U.S. EPA Office of Ground Water and Drinking Water. New regulations in the form of the Stage 1 and the Stage 2 Disinfectant and Disinfection Byproduct (DBP) Rules have putnew demands on drinking water facilities to change and improve their treatment processes to address the concerns around microbial risks in potable water while reducing the associated disinfection and its respective byproducts that are used to decrease microbial risks. ClO2makes it efficient and feasible for drinking water facilities to comply with the new regulations. ClO2 is a versatile oxidant /disinfectant with CT values second only to ozone in biocidal efficacy, but without the high capital expenditures and associated byproducts.

The byproduct of chlorine dioxide is chlorite ion, which is a reduction byproduct and is regulated under the Stage One and the Stage TwoDBP Rule at 1.0 mg/L maximum contaminant level (MCL). At typical usage rates, ClO2 can be used to successfully help ensure compliance for pathogen inactivation.

Generation Methods

Chlorine dioxide cannot be shipped in a drum and must be generated on-site. OXYCHLOR® generators use ADOX® sodium chlorite provided by International Dioxcide, Inc. (IDI) as the precursor solution to ClO2. OXYCHLOR® generators react ADOX® sodium chlorite along with chlorine gas to produce ClO2 on-site. Alternatively, bleach and acid are used with ADOX® to generate ClO2 when chlorine gas is not available. The OXYCHLOR® generator systems are modular in design and easily customized to fit a variety of application sizes that adhere to industry safety standards.

Low Capital / Easily Implemented

An IDI Oxychlor® on-site generator produces ClO2 solution safely under vacuum and delivers the solution to the point of application. Chlorine dioxide is fed similarly to existing chlorine disinfection treatment systems often using the existing feed piping. There are numerous types of affordable generators available from IDI that can normally be installed in 1 - 2 days to meet your treatment needs. Typical OXYCHLOR® systems cost $ 25,000 and can normally be installed in 1 - 2 days. Typical chemical operating costs will be in the $ .03 - .08 per 1,000 gal of treated water.  

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