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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.

  • 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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