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  • 1.
    Andersson, Bengt-Åke
    et al.
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Johansson, Andreas
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Förbränning och termiska system för hållbar utveckling2009Ingår i: Vetenskap för profession, ISSN 1654-6520, nr 10, s. 79-81Artikel i tidskrift (Övrigt vetenskapligt)
  • 2.
    Björk, Hans
    et al.
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Lindecrantz, Kaj
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Ericsson, Dag
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Sarv, Hans
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Bolton, Kim
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Börjesson, Anders
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Bazooyar, Faranak
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Ahlström, Peter
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Taherzadeh, Mohammad
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Andersson, Bengt-Åke
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Johansson, Andreas
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Skrifvars, Mikael
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    20 år med Institutionen Ingenjörshögskolan: historik, nuläge och framtid2009Rapport (Övrigt vetenskapligt)
  • 3.
    Claesson, Frida
    et al.
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Wikström Blomqvist, E.
    Johansson, A.
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Skrifvars, B.J.
    Andersson, Bengt-Åke
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Annual variation in elemental, dioxin and PCB content within Swedish waste fuels: results from two plants2009Ingår i: Proceedings Sardinia 2009, Twelfth International Waste Management and Landfill Symposium S. Margherita di Pula, Cagliari, Italy; 5-9 October 2009, 2009, s. 347-348Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    This paper reports on the annual variation of the composition of waste fuels fed to two different Waste to Energy (WtE) plants in Sweden. Twelve waste fuel samples from one year of sampling in each plant were analysed with Ion Chromatography and Inductively Coupled Plasma-Optical Emission Spectroscopy to study the variation of elements within and between the fuels of the two different plants and also to investigate any seasonal variations. The ultimate analyses show that the composition was rather similar throughout the sampling period for both plants, respectively. However, there was a larger variation in the content of ash forming elements within and between the plants. Trace metals, present in low concentrations, showed the widest relative variation. The samples were also analysed for dioxin and PCB content. The reported average value for all samples is 29 ± 15 ng I-TEQ dioxin per kilo dry waste. The calculated toxicity of twelve PCB congeners, reported as WHO-PCB, is less or close to the detection limit < 0.02 μg PCB WHO-TEQ per kilo dry waste.

  • 4.
    Elled, Anna-Lena
    et al.
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Åmand, Lars-Erik
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Andersson, Bengt-Åke
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Leckner, B.
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Phosphorus in ash from co-combustion of municipal sewage sludge with wood in a CFB boiler: A comparison of experimental data with predictions by a thermodynamic equilibrium model2005Konferensbidrag (Refereegranskat)
    Abstract [en]

    Combustion tests have been carried out in a circulating fluidised bed (CFB) boiler co-firing wood and municipal, digested and mechanical dewatered sewage sludge from two Swedish wastewater treatment plants, using either iron sulphate or aluminium sulphate as precipitating chemicals. Experimental data on the concentration of various phosphorous compounds in the ashes are compared with theoretical equilibrium predictions. A clear relationship is not found between the employed precipitation chemical and the formation of phosphorous compounds in the ash. Hematite (Fe2O3(s)) is predicted to be the stable iron compound, and even in the sludge precipitated by iron sulphate, the aluminium content is sufficient to form aluminium phosphate (AlPO4(s)) in similar amounts as in the sludge precipitated by aluminium sulphate. Lime addition to the bed gives a decreased formation of AlPO4(s) in favour of calcium orthophosphate (Ca3(PO4)2(s)), which interferes with the sulphur capture efficiency of lime.

  • 5.
    Elled, Anna-Lena
    et al.
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Åmand, Lars-Erik
    Leckner, Bo
    Andersson, Bengt-Åke
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    The fate of trace elements in fluidised bed combustion of sewage sludge and wood2006Ingår i: Fuel, ISSN 0016-2361, E-ISSN 1873-7153, Vol. 86, nr 5-6, s. 843-852Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Combustion tests have been carried out in a fluidised bed boiler to investigate the fate of trace elements during co-combustion of wood and municipal sewage sludge. The approach was to collect fuel and ash samples and to perform thermodynamic equilibrium calculations for gasification (reducing) and combustion (oxidising) conditions. Trace elements are found in the ash. Even most of the highly volatile Hg is captured in the bag filter ash. The bag filter ash offers higher surface area than the secondary cyclone ash and enhances the capture of Hg. There is no obvious correlation between capture and parameters investigated (sludge precipitation agent and lime addition). As, Cd, Hg, Pb, Se, Sb and Tl are predicted by equilibrium calculations to be volatile in the combustion chamber under oxidising conditions and Hg even at the filter temperature (150°C). Reducing conditions promote, in some case more than others, the volatility of As, Cd, Pb, Sb, Se, Tl and Zn. The opposite effect was observed for Cu and Ni. Data points to the necessity of including bag-filter in the gas cleaning system in order to achieve good removal of toxic trace elements.

  • 6.
    Elled, Anna-Lena
    et al.
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Åmand, L.-E.
    Leckner, B.
    Andersson, Bengt-Åke
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Influence of phosphorus on sulphur capture during co-firing of sewage sludge with wood or bark in a fluidised bed2006Ingår i: Fuel, ISSN 0016-2361, E-ISSN 1873-7153, Vol. 85, nr 12, s. 1671-1678Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Interference from phosphorus on sulphur capture during co-firing of sludge with wood has been investigated in a circulating fluidised bed boiler. Chemical equilibrium analyses were performed on the combustion system to complement the experimental results. It was found that the relatively high content of phosphorus in municipal sewage sludge interferes with the sulphur capture by occupying calcium, which otherwise would be available for reaction with sulphur. This fact must be taken into account when sulphur capture strategies are decided for reduction of sulphur dioxide emissions from sewage sludge as an additional fuel.

  • 7.
    Johansson, Andreas
    et al.
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Blomqvist, Evalena
    Ekvall, Annika
    Gustavsson, Lennart
    Tullin, Claes
    Andersson, Bengt-Åke
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Bisaillon, Mattias
    Jarlsvik, Tisse
    Assarsson, Anders
    Peters, Gunnar
    Report: Waste Refinery in the Municipality of Borås2007Ingår i: Waste Management & Research, ISSN 0734-242X, E-ISSN 1096-3669, Vol. 25, nr 3, s. 296-300Artikel i tidskrift (Refereegranskat)
  • 8.
    Johansson, Andreas
    et al.
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Eskilsson, David
    Johansson, Linda
    Wikström-Blomqvist, Evalena
    Andersson, Bengt-Åke
    Högskolan i Borås, Institutionen Ingenjörshögskolan.
    Johnsson, Anders
    Combustion of Demanding Waste Fractions in a 10 MWe Waste-toEnergy Plant2007Ingår i: In Proceeding of ISWA/NVRD World Congress 2007, 2007Konferensbidrag (Övrigt vetenskapligt)
1 - 8 av 8
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