Search for dissertations about: "ash treatment"

Showing result 1 - 5 of 66 swedish dissertations containing the words ash treatment.

  1. 1. Characterization and treatment of municipal landfill leachates

    Author : Ulrika Welander; Bioteknik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; physical chemical treatment; biological treatment; characterization; organic substances; leachate treatment; municipal landfill; Biotechnology; Bioteknik;

    Abstract : Abstract The efficiency of different leachate treatment methods for the removal of refractory organic compounds and ammonium-nitrogen was investigated. The methods evaluated were nitrification, denitrification, adsorption onto activated carbon, precipitation by ferric chloride or aluminum sulphate and oxidation by ozone or Fenton´s reagent. READ MORE

  2. 2. Leaching, filtration and displacement washing in a treatment process for MSW combustion fly ash - laboratory scale and plant studies

    Author : Magda Wilewska-Bien; Chalmers University of Technology; []
    Keywords : washing; filtration; MSW; cyclone ash; : leaching; fly ash; MSWI ash;

    Abstract : Municipal Solid Waste combustion, as one of the waste management tools, starts to play an important role nowadays in heat and energy generation. However, MSW combustion leads to generation of other wastes - combustion residues, including ashes, which require a proper management. READ MORE

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

    Author : Lisa Lundin; Stellan Marklund; Mats Tysklind; James Mulholland; Umeå universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; 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. 4. Co-firing animal waste, sludge, residue wood, peat and forest fuels in a 50MWth CFB boiler : ash transformation, availability and process improvements

    Author : Henrik Hagman; Dan Boström; Rainer Backman; Anders Nordin; Umeå universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; NATURVETENSKAP; TEKNIK OCH TEKNOLOGIER; NATURAL SCIENCES; ENGINEERING AND TECHNOLOGY; Co-combustion; animal waste; peat; waste wood; forest residues; industrial sludge; limestone; CFB boiler; ash transformation; corrosion; erosion; ash and deposit characteristics; deposit buildup; boiler failures; availability; sulfation; boiler design; boiler conversion; waste derived fuels; large scale; Samförbränning; animaliskt avfall; torv; returträ; skogsbränsle; reningsslam; askomvandling; korrotion; erosion; ask- och beläggnings-karaktäristik; beläggningstillväxt; tillgänglighet; sulfatisering; panndesign; pannkonvertering; avfallsderiverade bränslen; storskalig;

    Abstract : The direct variable costs for heat and electricity production based on solid biomass fuel combustion is approximately 3-5 times lower than the costs in a fossil fuel-oil based boiler in Sweden. In addition waste derived biomass fuels are typically much cheaper than biomass not classified as waste. READ MORE

  5. 5. Application of indigenous materials in drinking water treatment

    Author : Herbert Mpagi Kalibbala; Bengt Hultman; Joaquin Martinez; KTH; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Coagulant aid; drinking water treatment; dual media filtration; Moringa oleifera; primary coagulant; trihalomethanes; volcanic ash; Water in nature and society; Vatten i natur och samhälle;

    Abstract : Volcanic ash and Moringa oleifera (M. oleifera) were investigated as indigenous materials for drinking water treatment based on problems identified at Kampala and Masaka water treatment plants in Uganda. READ MORE