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free chlorine Applications

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    Ultraviolet disinfection systems for the de-chlorination industry

    The purpose of de-chlorination is the removal of free chlorine and combined chlorine compounds from potable water, as supplied by municipal water supplies. Chlorine will oxidize the surface of thin film composite polyamide membranes, causing the membrane to lose its ability to repel or reject salts. As a result, the membranes used in Reverse Osmosis (RO) or Electro-deionisation (EDI) systems will exhibit shorter lifetimes when exposed to chlorine in the water they are treating and membrane manufacturers will usually specify an upper limit to ensure a suitable life of the membrane. As a result, it is usual to use a method of dechlorination upstream of the RO or EDI system.

    By atg UV Technology based in Wigan, UNITED KINGDOM.

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    Early Warning Systems for Drinking water

    Drinking water supply and distribution systems around the world (a critical and interdependent component of a nation’s infrastructure) are vulnerable to both intentional and accidental contamination. Unusual water quality may serve as a warning of potential contamination. The available physico-chemical sensors utilize general water quality parameters, such as free chlorine, oxidation reduction potential (ORP), total organic carbon (TOC), turbidity, pH, dissolved oxygen, chloride, ammonia, nitrate to detect the contamination. Generally, one or more of these water quality parameters will change due to the injection of a contaminant. However, no single chemical sensor responds to all possible contaminants nor can they give any indication of the potential toxicity of complex mixtures.

    By microLAN B.V. based in Waalwijk, NETHERLANDS.

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    Ultraviolet disinfection systems for the offshore potable drinking water

    atg UV Technology are the market leader for UV systems designed to treat potable drinking water for offshore crew water supplies. UV is now the disinfection technology of choice, providing a simple chemical free solution to protect against all known bacteria and harmful microorganisms, including chlorine resistant microorganisms such as Cryptosporidium and Giardia. Available as skid mounted, duty / standby solutions, atg UV Technology’s offshore UV drinking water packages are included as part of the on board water maker, typically installed following desalination by an RO package or Flash Evaporator.

    By atg UV Technology based in Wigan, UNITED KINGDOM.

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    Ultraviolet disinfection systems for the swimming pools industry

    Ultraviolet disinfection is now an established method of water treatment for Swimming Pools, Spas, Hydro Pools, Splash Pads and Water Features, and has become the preferred treatment choice for a number of leading international leisure brands. atg UV`s range of treatment systems are proven to improve the swimming pool environment by improving water quality, air quality and safety, leading to increased customer satisfaction. UV systems not only provide disinfection against the 17 known chlorine resistant micro-organisms, such as Cryptosporidium and Giardia, which have a thick outer membrane making them highly resistant to traditional Chlorine disinfection, UV also destroys chloramines. Chloramines are formed when free chlorine reacts with organics, such as sweat, body fats and urine, brought into the pool environment by bathers.

    By atg UV Technology based in Wigan, UNITED KINGDOM.

  • Aerobic Septic System Ozone Disinfection Devices

    Our method is the use of Ozone generation. Ozone is a strong oxidizer that is up to 3000 times for effective than Chlorine. Ozone is not stored, Ozone is generated on site. With this method, this offers the homeowner a means of disinfection that is completely hands free. Ozone is very safe for the environment, with the only bi-product being Oxygen. Ozone is generated by bonding 3 atoms of Oxygen to form Ozone. Once the Ozone comes in contact with a virus or bacteria, the Ozone attacks the nucleus of the cell and destroys the bacteria or virus. Ozone will make this kill up to 3000 times faster than Chlorine. Once, the Ozone attacks the bacteria it reverts back to Oxygen. Ozone is not stored, Ozone has to generated on site.

    By Aerobic Guard, LLC based in Waxahachie, TEXAS (USA).

  • Cyanide Treatment with Hydrogen Peroxide

    Cyanides are used in a number of chemical synthesis and metallurgical processes (as simple salts or cyanide complexes). As a class, cyanides are highly toxic and must be destroyed or removed from wastewaters prior to discharge. The most common method for treating free or simple cyanide is alkaline chlorination. However, chlorination of cyanide results in highly toxic intermediates (e.g., cyanogen chloride) and, if organic material is present, chlorinated VOC’s. These compounds, together with the residual chlorine, create additional environmental problems. Consequently, there is a growing need for alternative, non-chlorine methods for destroying cyanides. Peroxygen compounds such as hydrogen peroxide, peroxymonosulfuric acid (1), and persulfates (1) are effective alternatives to alkaline chlorination for destroying free and complexed cyanides. The choice of peroxygen system depends on the reaction time available, the desired products (cyanate, or CO2 and NH3), the types of cyanides being treated (free, weak acid dissociable, or inert), and the system economics. Treatment with Hydrogen Peroxide While hydrogen peroxide will oxidize free cyanide, it is common to catalyze the reaction with a transition metal such as soluble copper, vanadium, tungsten or silver in concentrations of 5 to 50 mg/L (2).

    By USP Technologies based in Atlanta, GEORGIA (US) (USA).

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