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power plant water treatment Applications

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    Water treatment for power plants

    The process of electricity generation from fossil fuels such as coal, oil and natural gas is water-intensive. Between 40-50% of all water abstracted and used in developed countries is used in the generation of electricity. Thus, a reliable, abundant and predictable source of raw water supply to a power plant is a critical factor in site selection. Water supplies are required to provide various process waters for the following essential main purposes such as make-up water, cooling water for steam turbine condensers, and auxiliary plant cooling water.

    The primary application of modern water treatment technology is to maintain the integrity and performance of the power plant. Critical plant applications have water purity or conditioning requirements that must be adhered to for safe, reliable and efficient power generation.

    Experience has shown that integration of water technology treatments with power plant design can be very important in reducing operational problems and component failures 

    At power plant worldwide there are increasing limitations on water availability and environmental restrictions on discharges. This is expected to promote measures for water conservation and to have an increasing influence on water treatment decisions. At power plant, the recycling of internal wastewater streams can extend from the recovery of individual high-quality waste streams, which can be reused either directly or after only limited treatment, through to the development of fully integrated water/wastewater treatment systems for zero liquid discharge. However, the application of reuse schemes requires site-specific assessment, as not all waters may be viable options for recovery.

    By De Nora Water Technologies based in Colmar, PENNSYLVANIA (USA).

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    Water treatment chemicals for power plants industry

    Today’s power industry is already subject to strict official regulations. These rules will only become more stringent in the future. As a result, environmentally friendly, cost-effective solutions that ensure plant and operational safety are in high demand.

    By Kurita based in Ludwigshafen, GERMANY.

  • Water Treatment for Power Plants

    By Canamidex International Corp. based in Richmond Hill, ONTARIO (CANADA).

  • Wind or solar powered sewage treatment plants

    Use natural air currents for aerobic sewage treatment via venting pipes. Alternatively, they can be solar powered using a very low energy 12 Volt fan. The FILTERPOD requires no electricity for the treatment process. They finally allow modern, high quality sewage treatment for all regions of the world, even for off-grid locations.

    By Water Technology Engineering Ltd. (WTE) based in Bolton, UNITED KINGDOM.

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    The Fractional Electrodeionization (FEDI) process is an advancement of conventional EDI. The patented dual voltage process allows for a higher flexibility and tolerance to inlet water conditions, thus lowering the risk of scaling, and improving the plant& design economics and reliability. By incorporating a two-stage separation process with different voltages the FEDI process is able to: Achieve a higher hardness tolerance by having distinctly different concentrate chambers with separate reject streams and thus reducing the potential of hardness scaling. Optimize power consumption by using higher electrical current only where required. Ensure the best water quality, continuously consistently by removing a major part of the deionization load in the hardness removal zone, while residual ionic impurities are effectively removed in the silica removal zone;, which stays in a polishing mode.

    By QUA Group LLC based in Canonsburg, PENNSYLVANIA (USA).

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    EDI Solutions

    QUA’s FEDI® (Fractional EDI) stacks have superior hardness tolerance compared to the other EDI products on the market. With a dual voltage process this allows for a higher flexibility and tolerance to inlet water conditions, thus lowering the risk of scaling, and improving the plant's design economics and reliability. FEDI stacks are available in three different models which can be applied either for higher hardness tolerance or high water flow rates. MEGA FEDI stacks are ideal for large capacity, high flow systems normally required in heavy industrial projects such as power, petrochemicals, & electronics for high purity water needs. Each stack can handle treated water flow of up to 75 GPM . MEGA FEDI’s unique stackable design minimizes piping, reduces footprint, and makes it simple and easy to install on skids. FEDI-Rx products are specially designed for applications in pharmaceutical, biomedical and laboratory applications where installations require hot water sanitization to meet

    By QUA Group LLC based in Canonsburg, PENNSYLVANIA (USA).

  • Water Data Management Solution for Water & Wastewater Treatment

    KISTERS solutions provide powerful data management capabilities for water/wastewater treatment plant operators. Easily interfaced to existing SCADA and telemetry systems, KISTERS solutions provide superior graphical and tabular editing and reporting capabilities for your process data. KISTERS solutions are a “future proof” choice for your data historian.

    By KISTERS group based in Aachen, GERMANY.

  • Cooling tower water treatment

    The fresh water requirement for a cooling tower in a typical coal-based power plant is approximately 80% of the total consumption of water. These concentrated cooling water blowdown streams are extremely rich in silica, are characterized by higher hardness levels and include other organic loads. Aquatech has vast experience in recycle/reuse solutions for cooling tower blowdown and cooling tower water treatment. 

    By Aquatech International Corporation based in Canonsburg, PENNSYLVANIA (USA).

  • Water treatment for meat processing

    Water is one of the single biggest raw materials used in meat processing, and its quality is of great importance to prevent contamination of food product. The use of contaminated water in the processing plant can spread infection across the whole food batch. This is a cause of serious concern to the food industry, consumers and regulatory bodies, besides that, it causes financial losses and food scare. Chlorine dioxide, a very powerful biocide, has a number of advantages over other products commonly used in the meat processing industry. When properly applied, chlorine dioxide can act as a break in contamination thereby reducing/eliminating cross contamination as well as removing superficial microorganisms before they have an opportunity to become attached and penetrate the carcass.

    By Applied Oxidation LLC based in Chattanooga, TENNESSEE (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).

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