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  • 1.
    Mellbo, Peter
    et al.
    Högskolan i Kalmar, Naturvetenskapliga institutionen.
    Sarenbo, Sirkku
    Högskolan i Kalmar, Naturvetenskapliga institutionen.
    Stålnacke, Olof
    Högskolan i Kalmar, Naturvetenskapliga institutionen.
    Claesson, Tommy
    Högskolan i Kalmar, Naturvetenskapliga institutionen.
    Leaching of wood ash products aimed for spreading in forest floors: influence of method and L/S ratio2008Inngår i: Waste Management, ISSN 0956-053X, E-ISSN 1879-2456, Vol. 28, nr 11, s. 2235-2244Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Use of biofuels in the form of logging residues is increasing in the European countries. This intensive forestry, where entire trees are removed from the felling sites, may contribute to a negative nutrient balance in the forest soil. Recycling of ash from the combustion of clean wood fuel, sometimes in combination with limestone or additives/binders, back into the forest soil could maintain the soil nutrient reservoir intact. Before spreading ash, it is important to determine its contents and, particularly, its decomposition pattern using reliabl laboratory leaching tests. In this study, mineralogy and the leaching of Na, Ca, K, Mg, Mn, Al, Cu, Fe, P, and Zn from wood ash pellets and granules, produced both from green liquor sludge and fly ash, are examined by XRD and by subjecting these substances to three different laboratory leaching tests: upflow percolation (CEN/TS 14405), batch leaching (SS-EN12457), and a new Swedish leaching test using a magnetic stirrer. Mineral phases such as quartz, ettringite, calcite, gehlenite, and aphtitalite were identified in the ash granules and in the ash/green liquor sludge granules, by means of XRD. Six additional minerals were detected in the granules of ash only, and another six in the ash/green liquor sludge granules. At L/S 2, the batch leaching test resulted in the highest amounts of elements leached and the upflow percolation test the lowest. At L/S 10, both the batch leaching test and the upflow percolation test resulted in high amounts of elements leached. The batch leaching test at L/S 10 complies quite well with the percolation test and could be suitable for ash/green liquor sludge granule evaluation in daily practice. The magnetic stirrer test seems to underestimate the release potential of elements from granules. The batch test is simple to perform, and has the ability to dissolve 70–80% of the elements with the highest mobility from the materials under study.

  • 2.
    Rasmusson, Helené
    et al.
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Sarenbo, Sirkku
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Claesson, Tommy
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Ash Products and Their Economic Profitability2013Inngår i: The Open Waste Management Journal, ISSN 1876-4002, E-ISSN 1876-4002, Vol. 6, s. 1-5Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Sustainable whole-tree harvesting practice requires that nutrient removal from the forest is compensated. Woodashes contain all the nutrients, except for nitrogen, that are found in unburned fuel and can also increase soil pH, whichmakes ash recycling a natural way to stabilize the nutrient balance and counteract the acidification of forest soils thatoccurs due to intensive forest management. Several methods for processing ashes into spreadable products have beendeveloped. The aim of this paper is to compare these methods. The study mainly focused on an economic evaluation ofproduction, transportation and the spreading of self-hardened ash, ash pellets and ash granules. Self-hardened ash isgenerally considered to be the cheapest alternative to manufactured ash products, but these results imply that the most costeffective alternative is ash pellets. Around 27% of total costs could be earned from recycling the ash by producing pelletsand 8% if granules are produced instead of self-hardened ash. This partly depends on the higher density of the pellets andgranules and a significant reduction in the number of transportation operations. The reduction in transportation operationsand diesel consumption also has major environmental benefits. Furthermore, it is more efficient to produce granules andpellets than it is to produce self-hardened ash and it is also easier to produce a reliable product of an appropriate size,shape and texture for a market that has well defined requirements.

  • 3.
    Rasmusson, Helené
    et al.
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Sarenbo, Sirkku
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Claesson, Tommy
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Ash products and their economic profitability2012Inngår i: Linnaeus Eco-Tech 2012, 26-28 Nov., Kalmar, Sweden: The Eighth International Conference on the Establishment of Cooperation Between Companies and Institutions in the Nordic Countries, the Baltic Sea Region, and the World Conference on Natural Sciences and Environmental Technologies for Waste and Wastewater Treatment, Remediation, Emissions Related to Climate, Environmental and Economic Effects, 2012Konferansepaper (Annet vitenskapelig)
  • 4.
    Sarenbo, Sirkku
    et al.
    Högskolan i Kalmar, Naturvetenskapliga institutionen.
    Claesson, Tommy
    Högskolan i Kalmar, Naturvetenskapliga institutionen.
    Limestone and dolomite powder as binders for wood ash agglomeration2004Inngår i: Bulletin of Engineering Geology and the Environment, Vol. 63, nr 3, s. 191-207Artikkel i tidsskrift (Fagfellevurdert)
  • 5.
    Sarenbo, Sirkku
    et al.
    Högskolan i Kalmar, Naturvetenskapliga institutionen.
    Claesson, Tommy
    Högskolan i Kalmar, Naturvetenskapliga institutionen.
    Mineralogy of granulated wood ash from a heating plant in Kalmar, Sweden2001Inngår i: Environmental Geology, Vol. 40: 820-828, nr February 2001Artikkel i tidsskrift (Fagfellevurdert)
  • 6.
    Sarenbo, Sirkku
    et al.
    Högskolan i Kalmar, Naturvetenskapliga institutionen.
    Claesson, Tommy
    Högskolan i Kalmar, Naturvetenskapliga institutionen.
    Abul-Milh, Miroslawa
    Steenari, Britt-Marie
    Drying of granulated wood ash by flue gas from saw dust and natural gas combustion2003Inngår i: Resources, Conservation and Recycling, Vol. 38, nr 4, s. 301-316Artikkel i tidsskrift (Fagfellevurdert)
  • 7.
    Sarenbo, Sirkku
    et al.
    Högskolan i Kalmar, Naturvetenskapliga institutionen.
    Lind, Bo
    Claesson, Tommy
    Högskolan i Kalmar, Naturvetenskapliga institutionen.
    Chemical composition and leaching characteristics of granules made of wood ash and dolomite1999Inngår i: Environmental Geology, Vol. 40, 1-2, nr December 2000, s. 1-10Artikkel i tidsskrift (Fagfellevurdert)
  • 8.
    Sarenbo, Sirkku
    et al.
    Högskolan i Kalmar, Naturvetenskapliga institutionen.
    Mellbo, Peter
    Högskolan i Kalmar, Naturvetenskapliga institutionen.
    Stålnacke, Olof
    Högskolan i Kalmar, Naturvetenskapliga institutionen.
    Claesson, Tommy
    Högskolan i Kalmar, Naturvetenskapliga institutionen.
    Reactivity and Leaching of Wood Ash Pellets Dehydrated by Hot Air and Flue Gas2009Inngår i: The Open Waste Management Journal, ISSN 1876-4002, E-ISSN 1876-4002, Vol. 2, nr 8, s. 47-54Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Companies that generate a large amount of wood ash will need an industrial process to agglomerate the ash and lower its reactivity, because untreated ash is a dust hazard for workers and is difficult to spread evenly on forest soil. In addition, untreated ash can cause burning damage to vegetation owing to its alkalinity and rapid release of salts. Production of large amounts of wood ash agglomerates demands an effective dehydration process. The reactivity and release of inorganic constituents from wood ash pellets dehydrated at room temperature using hot air and flue gas was investigated. Our results imply that flue gas-treated pellets have significantly lower reactivity in terms of pH and electrical conductivity, and release less Ca2+ and more Mg2+ compared to pellets dried at room temperature or in hot air. Ash pellets dehydrated in hot air are very reactive, and release more Ca2+ than pellets dried in other ways. The formation of syngenite during the flue-gas treatment decreases K+ release from the ash pellets.

     

     

     

     

  • 9.
    Sarenbo, Sirkku
    et al.
    Högskolan i Kalmar, Naturvetenskapliga institutionen.
    Svantesson, Thomas
    Claesson, Tommy
    Högskolan i Kalmar, Naturvetenskapliga institutionen.
    Solidification of biomass fuel combustion residues for recycling: Experiences from a 5-year research project.2005Inngår i: / [ed] Pechová J and Karas J., Prague, Czech Rebublic, 2005Konferansepaper (Fagfellevurdert)
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