Search for dissertations about: "ash"

Showing result 11 - 15 of 313 swedish dissertations containing the word ash.

  2. 11. Formation and degradation of PCDD/F in waste incineration ashes

    Author : Lisa Lundin; Stellan Marklund; Mats Tysklind; James Mulholland; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; MSW; fly ash; remediation; ash; PCDD; PCDF; formation; degradation; destruction; dechlorination; thermal treatment; Environmental chemistry; Miljökemi;

    Abstract : The disposal of combustible wastes by incineration is a controversial issue that is strongly debated by both scientists and environmental activists due to the resulting emissions of noxious compounds, including (inter alia) polychlorinated dibenzo-p-dioxins (PCDDs), dibenzofurans (PCDFs), heavy metals and acid gases like sulfur dioxide. Currently available air pollution control devices are capable of effectively cleaning flue gases, and PCDD/F emissions to air from modern municipal solid waste (MSW) incinerators are low. READ MORE

  4. 12. Environmental impact of bio fuel ash in a road constuction

    Author : Rickard Thurdin; Mittuniversitetet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; ash; centrifugation; DOC; heavy metals; ICP-MS; ion chromotography; leaching; lysimeter; recycling; road construction; soil solution; soil water; Chemistry; Kemi;

    Abstract : .... READ MORE

  5. 13. The Survey of Ash Agglomeration Phenomena in a Commercial Circulating Fluidised Bed (CFB)

    Author : Ann Charlotte Tranvik; Mehri Sanati; Britt-Marie Steenari; Växjö universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; CFB; combustion; biomass; agglomeration; ash; silicate; potassium; bed material; layer; deposition; Thermal energy engineering; Termisk energiteknik;

    Abstract : Renewable energy sources will act an important roll in the development of sustainability in the future in order to protect environment and ecological cycle.Amongst the Kyoto protocol conclusions there is an agreements for the EU a reduction of 8 % of greenhouse gas emissions (corresponding of around 6 million tonnes of CO2 equivalents ) between 2008-2012 (compared to 1990 level). READ MORE

  6. 14. Greenhouse gas fluxes between drained forested peatlands and the atmosphere - influence of nutrient status and wood ash fertilization

    Author : Maria Ernfors; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; greenhouse gases; peatlands wood; ash; nutrient status;

    Abstract : The management of peatlands for wood production involves drainage and, sometimes, fertilization with, for example, wood ash. The effects of these measures on greenhouse gas fluxes, in relation to the ... READ MORE

  7. 15. Automated Manufacture of Fertilizing Agglomerates from Burnt Wood Ash

    Author : Thomas Svantesson; Industriell elektroteknik och automation; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Adaptive Filtering; Ash Recycling; Change Detection; System Identification; Real-Time Control; Robust Control; Process Design; Control System Design; Carbon In Fly Ash CIFA monitoring; PID-Control; Agglomeration Techniques; Moisture Control; Dehydration Techniques.; Automation; robotics; control engineering; Automatiska system; robotteknik; reglerteknik;

    Abstract : In Sweden, extensive research is conducted to find alternative sources of energy that should partly replace the electric power production from nuclear power. With the ambition to create a sustainable system for producing energy, the use of renewable energy is expected to grow further and biofuels are expected to account for a significant part of this increase. READ MORE