**In water treatment, microbiological growth can cause damages such as corrosion, biofouling and formation of hydrogen sulfide (H2S) and slime, all of which can reduce the plant’s global efficiency through unscheduled downtimes, reduced heat transfer and loss of production. The HydrexⓇ 7000 Series is a range of chemicals specifically formulated to protect assets from contaminants.** [CONTACT US TO FIND OUT HOW WE CAN HELP](https://www.veoliawatertechnologies.com/en/contact-web2lead) ## Efficient microbiological control agents An essential challenge for water treatment plants and related systems, the use of chemicals to control microbiological growth (algae, fungi, bacteria, protozoa, etc.) is **subject to strict regulations**. The objective is to ensure a high level of protection of the environment by approving only effective substances that **do not present unacceptable risks.** Compliant with the most stringent local norms, our Hydrex 7000 range comprizes oxidizing and non-oxidizing biocides with a broad spectrum of efficiency or targeted against a specific contaminant: - Rapid-action or delayed-action chemical products. - Continuous-action or shock treatment products. - [OSG HydrexⓇ](/en/services/disinfection-salt-electrolysis-osg-hydrex "Disinfection by salt electrolysis OSG HydrexⓇ") (On-site Generation): environmentally friendly technology based on salt hydrolysis to generate a biocidal solution in situ, avoiding chemical transportation and storage costs. They are selected by Veolia experts for many applications : - Cooling systems. - Legionella control. - Bio-fouling. - [Drinking water grade](/en/applications/veolia-water-technologies-supplies-world-drinking-water "Veolia Water Technologies supplies the world with drinking water") in the [food and beverage industry.](/en/core-markets/food-beverage "Food and Beverage ") - Hot sanitary water. - Sanitization of [Municipal Wastewater](/applications/municipal-wastewater "Municipal wastewater treatment") and [Industrial wastewater treatment ](/applications/industrial-wastewater-treatment "Industrial wastewater treatment")before [reuse](/en/applications/reuse "Reuse").  ## Features and benefits  **Each product of the range is lab-tested and market-approved.**  **Chemicals to be coupled with [equipment](/en/services/equipment-for-chemical-water-treatment-solutions "Equipment for chemical water treatment solutions "), [digital services](/en/services/hubgrade-hydrex-chemical-solutions "Hubgrade for Hydrex® chemical solutions"), [real-time monitoring ](/en/services/hydrex-controllers "HydrexⓇ Controllers")tools and on-site service for complete Hydrex water treatment programs.**  **Control of microbiological growth.**  **Prevention of equipment degradation and protection of their integrity.**  **Prevention of biofilm formation avoiding reduced heat transfer rates (removal of already-formed biofilm).**  **Continuous range optimization with less harmful products.** ## Resources [PDF Hydrex Biocidal treatment chemicals (261.86 KB) ](/sites/g/files/dvc3326/files/document/2024/03/DS%20WTC%20HYDREX%207000%20Series%20Biocides%20112023%20EN.pdf) ## Applications [  ](/applications/veolia-water-technologies-supplies-world-drinking-water)[Drinking water](/applications/veolia-water-technologies-supplies-world-drinking-water) ### [Drinking water](/applications/veolia-water-technologies-supplies-world-drinking-water) [  ](/applications/industrial-wastewater-treatment)[Industrial wastewater treatment](/applications/industrial-wastewater-treatment) ### [Industrial wastewater treatment](/applications/industrial-wastewater-treatment) [  ](/applications/process-water)[Process water](/applications/process-water) ### [Process water](/applications/process-water) [  ](/applications/utility-feed-water)[Utility feed water](/applications/utility-feed-water) ### [Utility feed water](/applications/utility-feed-water) [go back to water treatment chemical programs overview](/services/water-treatment-chemical-programs)