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ecological system Applications

  • Aquatic Respirometry

    Aquatic respiration can be simply yet accurately measured on intact, live organisms using a variety of Strathkelvin Instruments respirometry systems. As with all of our respirometry systems, an aquatic system would comprise of an oxygen meter (either 782 or 928), one or more, high precision, 1302 oxygen electrodes (link) and a respiration chamber to house the organism. The researcher also has a choice of measuring respiration rates via closed or flow-through respirometry. Both closed and flow-through systems utilise the same oxygen meters and 1302 oxygen electrodes, however, the chamber in which the organism is housed will differ.Respiration of aquatic organisms (closed cell method)

    By Strathkelvin Instruments Ltd. based in Motherwell, UNITED KINGDOM.

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    Water treatment chemicals for the food & beverage industry

    The food and beverage industry is suffering from severe economic pressure. Efficient and continuous production processes are therefore business critical. By choosing Kurita concepts for your cooling water, boiler water and waste water plants as well as your reverse osmosis systems and autoclaves – all of which are specially adapted to your needs – you opt for economic and ecological treatment, leading to more productivity and cost-efficiency.



    By Kurita based in Ludwigshafen, GERMANY.

  • Environmental

    The analysis of volatile organic compounds at low concentration levels is fundamental to pollution monitoring and control. Hiden’s Hydramass spectrometer is a multi-stream gas analysis system for analysis of volatile organic compounds to the sub ppm level. In sea water the analysis of volatile organic compounds is used for both pollution monitoring and ecological studies. Hiden’s HPR 40 dissolved species analyser provides ppb sensitivity

    By Hiden Analytical based in Warrington, UNITED KINGDOM.

  • Thickening and dewatering of sludges for water and wastewater industry

    Both economic and ecological demands make maximum dewatering of sludge a most crucial step in the process flow, especially for the pulp and paper industry with their large quantities of sludge to handle. A highest possible dry content of dewatered sludge minimizes weight and volume, hence achieving the following objectives: reduction of transport and disposal cost. high heating value for incineration without additional fuel. With the sludge dewatering systems including both AKSE S disc thickener and AKUPRESS BX screw press BELLMER KUFFERATH Machinery offers plant and equipment able to dewater structured sludges to maximum dry contents.

    By BELLMER KUFFERATH Machinery GmbH based in Düren, GERMANY.

  • 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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