Chlorine Dioxide for Industrial Water Treatment
Chlorine dioxide (ClO2) is used as a biocide in many industrial water treatment applications, including cooling towers, process water, and mill water. Its selective oxidative properties usually result in lower dosages of chlorine dioxide versus traditional oxidizers, while also achieving improved microbial performance.
Odor Control and Odor Scrubbers
Chlorine dioxide controls odor in two ways: by controlling microorganisms that form odor-causing hydrogen sulfide and by destroying hydrogen sulfide odors through chemical oxidation. Using an odor scrubber, chlorine dioxide solutions may be added directly to water containing the odorous compounds.
Cooling Towers
Cooling towers are a prime environment for the buildup of microorganisms. Maintaining control of this buildup is essential for efficient operation of the cooling loop. This can be successfully achieved with the use of chlorine dioxide. Microorganisms build slime layers and other colonies, which can result in several serious problems: increased deposits, buildup of odors and slime due to the adhesive nature of the biofilm layer, loss of heat transfer due to the insulating nature of inorganic deposits, increased corrosion rates due to “under deposit corrosion,” and increased consumption of power due to the restriction by the deposition. The injection of chlorine dioxide into the recirculation of the cooling towers alleviates these issues and also causes less wear and tear on the equipment.
Pulp Bleaching and Process Water
Chlorine dioxide is widely used for bleaching pulp. It is also a very effective biocide to control process water and wastewater environmental issues associated with mill and process water. Because chlorine dioxide has unique biocidal properties, it can also be used effectively as a disinfectant, algaecide, and oxidizer in influent process waters and wastewaters.
CIP Sanitizer
For clean-in-place (CIP) applications, water is injected directly into a facility’s fluid distribution network and circulated for a set duration of time. Compared with traditional chlorine chemicals or hot water, overall chemical costs are reduced, sewage disposal costs are lowered or eliminated, and system corrosion is diminished.
Paper Slimicide
Acting as a wet end slimicide, the benefits of chlorine dioxide include highly cost-effective microbiological control, extended run ability of paper machines, lower corrosion rates on machine metallurgy, reduced boil-out frequency of stock chests, and highly cost-effective microbiological control.
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