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oxidizer media Applications

  • 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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    Wood Products

    MEGTEC is a leader in providing regenerative thermal oxidizers (RTO) for VOC control for products such as OSB, MDF, SYP, plywood, particleboard, wood pelletizing and other engineered wood products, with particular expertise in solving the problems of media plugging and alkali attack associated with wood dryer exhaust. With thousands of systems installed worldwide in many process industries, MEGTEC has the knowledge to provide you with the best solution for your specific needs. MEGTEC’s designs are modular and cleanable, using alkali-resistant ceramics and corrosion-resistant materials of construction.

    By Babcock & Wilcox MEGTEC based in De Pere, WISCONSIN (USA).

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    Ethanol and Biofuels

    Controlling the VOCs and CO emissions produced in the feed dryers (wet and dry milling), coupled with the particulate matter being introduced and the need for the reduction of NOx are just the start of having a successful abatement solution. The challenges of smooth pressure control that reduces dryer fluctuations and plug resistant media that lessen the frequency of bake-outs are also part of a successful abatement system and we have the solutions. Our engineered oxidation systems provide reliable performance with minimal maintenance requirements. Externally accessible valve bearings and other critical components are kept out of the corrosive moisture-laden streams extending the life of the equipment and facilitate maintenance intervals. Our simple oxidizer designs control your emissions with minimal facility intervention and allow us to provide you with reliable and dependable equipment.

    By Babcock & Wilcox MEGTEC based in De Pere, WISCONSIN (USA).

  • Natural gas gathering system for inlet gas separation

    Natural gas gathering systems deliver large volumes of gas via pipleline to the central inlet of the gas processing facility. Removal of solid contaminants and free liquids present in the inlet gas is critical to the downstream process. Iron oxides, iron sulfides, dirt and other deformable particles can flow into the processing system. Effective removal of these contaminants is needed to prevent fouling. Pentair Porous Media technologies will help with a clean, natural gas feed, reducing upsets and associated downtime and increase productivity, lowering capital costs with fewer change-outs.

    By Pentair Filtration Solutions, LLC based in Conroe, TEXAS (USA).

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