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carbon dioxide management Applications

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    Methane and Carbon Dioxide Sensing for Landfill Applications

    Application: In March 1986 an explosion destroyed a bungalow adjacent to a landfill site in Loscoe, Derbyshire. Subsequent measurements showed that 150-200 cubic meters of gas per hour were being generated by landfill waste. This event triggered a change in the way the waste industry considered and regulated gas generated at landfill sites; resulting in the landfill regulations of 2002, and in particular LFTGN03: the Guidance on the Management of landfill Gas.

    By Edinburgh Instruments Ltd based in Livingston, UNITED KINGDOM.

  • Wastewater treatment solutions for anaerobic sludge digestion sector

    Anaerobic digestion is a series of processes in which microorganisms break down biodegradable material in the absence of oxygen, used for industrial or domestic purposes to manage waste and/or to release energy. It is widely used as part of the process to treat wastewater, like Upflow Anaerobic Sludge Blanket (UASB) reactors. As part of an integrated waste management system, anaerobic digestion reduces the emission of landfill gas into the atmosphere. Anaerobic digestion is widely used as a renewable energy source because the process produces a methane and carbon dioxide rich biogas suitable for energy production, helping to replace fossil fuels. The nutrient-rich digestate which is also produced can be used as fertilizer. The digestion process begins with bacterial hydrolysis of the input materials in order to break down insoluble organic polymers such as carbohydrates and make them available for other bacteria. Acidogenic bacteria then convert the sugars and amino acids into carbon dioxide, hydrogen, ammonia, and organic acids. Acetogenic bacteria then convert these resulting organic acids into acetic acid, along with additional ammonia, hydrogen, and carbon dioxide. Finally, methanogens convert these products to methane and carbon dioxide.

    By QM Environmental Services Ltd. based in The Hague, NETHERLANDS.

  • RDF

    RDF (Refuse Derived Fuel) is made from domestic waste which includes biodegradable material as well as plastics, and has a lower calorific value than SRF (Solid Recovered Fuel). RDF (Refuse Derived Fuel) is used in combined heat and power facilities, many of them in Europe where they produce electricity and hot water for communal heating systems in the local area. Compared to landfilling, the lower carbon emissions resulting from RDF manufacture outweigh the emissions associated with transporting the reclaimed fuel. The increasing importance of Waste to Energy/RDF Waste to energy conversion is an increasingly recognised approach to resolving two issues: waste management and sustainable energy. Waste represents an increasingly important fuel source. Using waste as fuel can have important environmental benefits. It can not only provide a safe and cost-effective way of waste disposal but can also help reduce carbon dioxide emissions.

    By MK Group based in Galbally, IRELAND.

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