Only show results available in Virginia? Ok

chemical free water treatment Applications

  • 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).

  • Sulfide Oxidation with Hydrogen Peroxide (H2O2)

    Sulfide Odor Control Sulfide is found throughout the environment as a result of both natural and industrial processes. Most sulfide found in nature was produced biologically (under anaerobic conditions) and occurs as free hydrogen sulfide (H2S) - characterized by its rotten egg odor. We are most likely to encounter biogenic H2S in sour groundwaters, swamps and marshes, natural gas deposits, and sewage collection/treatment systems. Manmade sources of H2S typically occur as a result of natural materials containing sulfur (e.g., coal, gas and oil) being refined into industrial products. For a variety of reasons - aesthetics (odor control), health (toxicity), ecological (oxygen depletion in receiving waters), and economic (corrosion of equipment and infrastructure) - sulfide laden wastewaters must be handled carefully and remediated before they can be released to the environment. Typical discharge limits for sulfide are < 1 mg/L. Sulfide Treatment Alternatives There are dozens of alternatives for treating sulfide laden waters, ranging from simple air stripping (for the low levels present in groundwaters) to elaborate sulfur recovery plants (used to treat several tons per day at refineries and coal burning power plants). There are processes based on biology (using compost filters, scrubbing media, or inhibition/disinfection), chemistry (oxidation, precipitation, absorption, and combination), and physics (adsorption, volatilization, and incineration). Each process occupies a niche which is often defined by the scale and continuity of treatment, whether the sulfide is in solution or is a gas, the concentration of sulfide involved, and the disposition of the sulfide containing medium. However, for reasons relating to convenience and flexibility, chemical oxidation (using hydrogen peroxide) continues to grow in its scope of application. Treatment with Hydrogen Peroxide While other peroxygens such as permonosulfuric (Caro’s) acid, peracetic acid, and persulfates will oxidize sulfide, their use for this application is overkill. Hydrogen peroxide (H2O2) is considerably simpler and more cost-effective. H2O2 may control sulfides in two ways, depending on the application: Prevention - by providing dissolved oxygen which inhibits the septic conditions which lead to biological sulfide formation; and Destruction - by oxidizing sulfide to elemental sulfur or sulfate ion.

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

  • Water treatment research for pharmaceuticals industry

    Ultrapure water is essential in the pharmaceutical industry as it provides a high purity solution free of biological contamination for use in medical products. Supplying these systems is market worth 714 million. There is a shift in the industry as manufacturers of low-cost generic drugs take advantage of the expiry of patents on blockbuster drugs. Water technology suppliers need to be able to supply a reliable system to fit the increasingly tightened budgets within the industry. Developing markets like India, Brazil and China are more attractive with outsourced manufacturing and government efforts to boost domestic production.

    By Global Water Intelligence (GWI) based in Oxford, UNITED KINGDOM.

  • Premium

    Drinking water treatment

    Drinking water can be produced from any natural sources like groundwater, lakes and rivers (surface waters) or seawater. Drinking water standards are set by the World Health organisation or by the European Union. Drinking water must be free of suspended solids, microorganisms and toxic chemicals. Mineral concentration recommendation vary from country to country but most of the minerals have a maximum concentration recommended to ensure safe, equilibrated and pleasant water to drink.

    By Lenntech Water Treatment based in Delft, NETHERLANDS.

  • CUSTOMER CONFIRMS LONGEVITY OF SCALEWATCHER ELECTRONIC WATER CONDITIONER

    Scalewatcher North America, manufacturer of the original, patented and award-winning computerized electronic water-conditioner, states in its literature that the device is produced to last at least 20 years and comes with a 10 year warranty. However, no reports have been received on the longevity of the units sold since the company was launched over 20 years ago. Now a customer in Gilroy, California has come forward requesting a new Scalewatcher unit after the device she purchased in 1992 finally stopped working. She purchased the new Scalewatcher from local dealer, Aqua Genesis, and reported that: “ I noticed that the sprinklers are covering more of an area than before. When I squirt water on the black and white tile patio table there are no longer any calcium spots even if I do not dry it off. The tile shower and the clear shower door are easier to wipe down after my shower. The new ScaleWatcher is much better than before. It certainly was time to replace the old one.” The new, innovative, electronic Scalewatcher water conditioner uses proven technology to quickly and effectively dissolve existing limescale and prevent it recurring, returning water systems and water-fed appliances such as kettles, washing machines and dishwashers to their former efficiency. It also removes scale around faucets, sinks, baths, plugholes and shower roses as well as preventing white marks on shower screens and mould on shower curtains. The system requires no plumbing, chemicals or maintenance and is environmentally friendly. In addition scale costs money for householders through additional cleaning products, the early renewal of water–fed equipment and additional costs to heat water. It is estimated that 40% more energy is needed to heat water in a system fouled with ¼ inch of limescale. Commenting Jan de Baat Doelman, President of Scalewatcher North America says: “We have always built Scalewatcher electronic water conditions to last and this latest information confirms the device’s longevity. Scalewatcher will pay for itself in less than three years and then carry on providing homes with a scale free environment many more years to come. ” Scalewatcher models are based on continuous research and over 20 years experience and expertise as market leaders in electronic scale control with countless units sold worldwide. The patented Scalewatcher systems start at $248.00 USD and are capable of treating pipe sizes from one to 120 inches. All Scalewatcher systems come with a full performance guarantee and include free shipping throughout North America.

    By Scalewatcher North America Inc. based in Oxford, PENNSYLVANIA (USA).

Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you