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industrial composting plant Applications

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    Recycling and Composting

    The treatment processes in recycling plants generate unpleasant and often harmful dust, which is a health hazard not only for nearby residents, but particularly for the employees. More and more legislation is being passed on dust control requiring such in the form of mobile units or fixed installations. In composting processes, the dust problem is compounded by unpleasant odors, which can be controlled effectively with specialized equipment. The same units are also used in biogas plants or for the removal and disposal of contaminated soil from industrial sites.

    By EmiControls based in Bolzano, ITALY.

  • Temperature monitoring in a rotary kiln

    Taking measurements on rotating equipment, such as a kiln or rotary table, usually requires a complex and expensive system of cabling. Even taking precautions and using specialized equipment doesn’t eliminate cable tangles and breaks. The SureCross Wireless Network eliminates complexities associated with data acquisition from rotating and moving machinery such as a rotating kilns in cement or composting industry. Crucial temperature data is acquired using a thermocouple and transmitted from the FlexPowered SureCross Nodes to a remote Gateway in the plant’s control center.

    By Banner Engineering Corp. based in Diegem, BELGIUM.

  • 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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