Sökning: "logging residue"

Hittade 5 avhandlingar innehållade orden logging residue.

  1. 1. Biodiversity & Biofuel. Harvest of Logging Residue Affects Arthropods

    Detta är en avhandling från Göteborg : University of Gothenburg

    Författare :Karolina Nittérus; Göteborgs universitet.; Gothenburg University.; [2006]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; biodiversity; beetles; biofuel; Carabidae; Cerambycidae; Celeoptera; forestry; habitat; structure; logging residue; Lycosidae; microhabitat choice; slash; species compositin; species richness; spiders; structural comlexity; whole-tree harvest;

    Sammanfattning : .... LÄS MER

  2. 2. Extraction of logging residues for bioenergy effects of operational methods on fuel quality and biomass losses in the forest

    Detta är en avhandling från Växjö : Linnaeus University Press

    Författare :Bengt Nilsson; Johan Bergh; Gudmund Vollbrecht; Rolf Björheden; [2016]
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; Forest fuel; Storage; Fraction composition; Needles; Defoliation; Moisture content; Nutrients; Nitrogen; Norway spruce; Picea abies; Skogsbränsle; Lagring; Fraktionsfördelning; Barr; Avbarrning; Fukthalt; Näringsämnen; Kväve; Gran; Picea abies; Forestry and Wood Technology; Skog och träteknik;

    Sammanfattning : Wood products play a key role in the transformation to a more sustainable society based on renewable bio-based resources, together with the positive effects on climate mitigation by replacing fossil fuels. However, to increase the use of forest fuel in practice it is important to understand the effects of handling and storage on its quality and removal of nutrients from the forest. LÄS MER

  3. 3. Acidification of Swedish forest soils : evaluation of data from the Swedish forest soil inventory

    Detta är en avhandling från ; Department of Soil and Environment, Swedish University of Agricultural Sciences

    Författare :Johan Iwald; Sveriges lantbruksuniversitet.; [2016]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Acidification of forest soils in Sweden has negatively affected nutrient status and caused toxic effects on biota. The aim of this thesis was to investigate potential impacts of two drivers of acidification of forest soils in Sweden: (1) tree growth with subsequent harvest and (2) deposition of sulphur and nitrogen compounds. LÄS MER

  4. 4. Residues from biochemical production of transport biofuels in Northern Europe combustion properties and applications

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Gunnar Eriksson; [2009]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Energy Engineering; Energiteknik;

    Sammanfattning : Residues from biochemical production of liquid transport biofuels will probably become available for energy use if more gasoline and diesel is substituted. For processes used in northern Europe they amount to 35-65 % of the feedstock energy and despite interest from energy companies, their fuel properties are largely unknown. LÄS MER

  5. 5. Slag formation in fixed bed combustion of phosphorus-poor biomass

    Detta är en avhandling från Luleå : Luleå University of Technology

    Författare :Ida-Linn Näzelius; Marcus Öhman; Bengt-Johan Skrifvars; [2016]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Biomass; slagging; fixed bed; Energiteknik; Energy Engineering;

    Sammanfattning : To handle a great demand for biomass, alternative biomasses beyond stem wood are being introduced into the solid fuel combustion market, fuels with generally higher (>0,5 wt-%) ash content and different fuel ash compositions compared to stem wood, such as forest residue, bark, grass and straw. Unfortunately, combustion of these alternative fuels often causes more ash related problems such as fouling, slagging and higher particle emissions compared to combustion of stem wood. LÄS MER