Sökning: "kvävehalter"

Visar resultat 1 - 5 av 9 uppsatser innehållade ordet kvävehalter.

  1. 1. Kolbestånd i restaurerade våtmarker, En fältstudie av anlagda våtmarker i Lunds kommun

    Master-uppsats, Lunds universitet/Miljövetenskaplig utbildning

    Författare :Simon Lin; [2020]
    Nyckelord :Kolbestånd; kolhalt; kolinlagring; kolsänka; sediment; våtmark; Earth and Environmental Sciences;

    Sammanfattning : Sedimentation of organic carbon in shallow lakes and wetlands removes CO2 from the atmosphere and can be considered a natural carbon sink. Actions toward regulating restored wetlands as carbon sink would provide Lund municipality with solution to combat CO2 emission goals for the future. LÄS MER

  3. 2. Nitrogen Removal in a Vacuum Tank Degasser : An Investigation on the Nitrogen Removal Performance

    Master-uppsats, KTH/Materialvetenskap

    Författare :Björn T. I. Ahlin; [2019]
    Nyckelord :Nitrogen Removal; VTD;

    Sammanfattning : The impending change of processes at SSAB Oxelösund due to the HYBRIT project, where the blast furnace and LD converter are to be replaced with an EAF will have a significant impact on the manufacturing of steel in Oxelösund. One issue that will arise is the nitrogen content in the steel. LÄS MER

  4. 3. In-situ Reduction by Incorporating H2 Filled Hollow Glass Microspheres in PM HIP Capsules

    Master-uppsats, KTH/Materialvetenskap

    Författare :Emil Strand; [2018]
    Nyckelord :Hot isostatic pressing; hollow glass microspheres; powder metallurgy; oxide reduction; surface oxides; hydrogen;

    Sammanfattning : For many metal components the presence of hard, non-metallic inclusions such as oxides lowers the impact toughness by acting as fracture initiation points and easing crack propagation. In components produced by powder metallurgy hot isostatic pressing (PM HIP), oxides often form a continuous network of small, spherical inclusions after consolidation at the prior particle boundaries (PPB). LÄS MER

  5. 4. Optimisation of the bottom stirring praxis in a LD-LBE converter : Investigations and tests on phosphorous removal, nitrogen as stirring gas, and slopping

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Oorganisk kemi

    Författare :José Aguirre Castillo; [2015]
    Nyckelord :LD; BOS; Bottom Stirring; Phosphorous; Steel making; Nitrogen;

    Sammanfattning : The LD-process, called after the cities Linz and Donawitz, is used to convert pig iron into crude steel by blowing oxygen on top of the pig iron. A LD-LBE converter, Lance Bubbling Equilibrium, also stirs the melt trough a bottom stirring system. LÄS MER

  7. 5. The effects of soil erosion on nutrient content in smallholding tea lands in Matara district, Sri Lanka

    Kandidat-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Författare :Elna Rasmusson; Carolina Emanuelsson; [2012]
    Nyckelord :physical geography; geography; smallholders; tea; soil erosion; GIS; nutrient content; Sri Lanka; te; jorderosion; geografi; naturgeografi; näringsinnehåll; småbönder; Earth and Environmental Sciences;

    Sammanfattning : Soil erosion is a major problem which is expanding as the natural vegetation is replaced by cultivations. This results in land degradation which decreases the quality and fertility of the soil. Sri Lanka is world leading on the market of tea, with smallholders contributing to an important amount of the production. LÄS MER