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release limit Applications

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    Gas monitoring instruments and systems for flavoring agents

    Manufacturing of powdered and liquid flavorings and fragrances involves production phases where flavoring chemicals may be released into the ambient air breathed by workers. Exposure control by gas analyzers in the production rooms and laboratories is necessary to ensure that the Time-Weighted Average (TWA) concentrations do not exceed the maximum Permissible Emission Limit (PEL) values.

    By Gasmet Technologies Oy based in Helsinki, FINLAND.

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    Agitation and mixing solutions for flue gas desulfurization

    FGD (Flue Gas Desulfurization) involves the treatment of flue gas from coal fired power plants.  The main goal is to remove sulfur, particulates, and other chemicals such as mercury from the flue gas prior to environmental release.  Governmental regulations by the EPA put limits on the amount of impurities which can be released into the air.   The use of mixers to clean and scrub the flue gas is utilized to help power companies meet permitted limits on the release of controlled substances.

    By National Oilwell Varco based in Dayton, OHIO (USA).

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    High quality gas sensor solutions for mining

    Fast, accurate and reliable measurement of CH4. The extraction of coal releases methane gas, which can mix with the air in a mine to form a hazard due to its flammability. Ventilation with fresh air from the surface is used to dilute the methane and reduce the risk of explosion. Monitoring of the methane content of the stale air exiting the mine allows the amount of ventilation to be controlled. Although our sensors are not ATEX approved for use in potentially explosive atmospheres they are suitable for monitoring air containing methane concentrations below the lower explosive limit. Our OEM products can be built into equipment which is approved for use in the monitoring of mine exhaust gas and similar applications.

    By Edinburgh Instruments Ltd based in Livingston, UNITED KINGDOM.

  • Environmental Reporting

    The Q EHS Environmental Reporting suite provides key tools for compliance with environmental legislation pertaining to the management, storage, use release, and disposal of hazardous materials. The software was developed to produce a variety of practical reports such as: • Performance and compliance assessments • Regulatory report submittals • Metrics and trend analyses for facility, divisional, and corporate management • On-site environmental incident occurrences Q EHS Air - Q EHS Waste - Q EHS Water - Q EHS Hazardous Materials Allow you to: • Associate and roll up usage data to appropriate unit - Business - Group - Sector - Division - Geographic - User-defined parameter • Estimate expected and potential emissions from various sources • Establish operating limits for automated checks and warning messages

    By Quantum Compliance based in Ann Arbor, MICHIGAN (USA).

  • Radionuclide Monitoring for Nuclear Power Plants

    The continuing establishment of nuclear power stations around the world pose unique environmental challenges for their operators. Ecotech provides air samplers to nuclear power plants for sampling of radionuclides. A nuclear power plant`s radionuclide monitoring network enables continuous sampling of airborne particles onto sample filters contained within High Volume Air Samplers. These filters are then analysed in a laboratory in order to screen for any radiation releases. The challenge has always been to obtain a sufficiently large volume through the filter in order to exceed the laboratory methods minimum detection limits. Ecotech`s MegaVol Sampler, samples at a flow rate of between 120-150 m3/hr providing a high flow rate in order to collect a sufficient sample mass for laboratory analysis. The MegaVol will maintain volumetric flow rate at a preset volume until the filter is either changed or overloaded. The MegaVol can be equipped with a 3G modem in order to remotely monitor flow rate and other diagnostic parameters such as temperature, pressure and wind speed and direction.

    By Ecotech Pty Ltd based in Knoxfield, AUSTRALIA.

  • 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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