Sökning: "total nitrogen"

Visar resultat 21 - 25 av 369 uppsatser innehållade orden total nitrogen.

  1. 21. Eco-Efficiency of 35 sectors of Sweden: A Stochastic Frontier Analysis

    Master-uppsats, Umeå universitet/Nationalekonomi

    Författare :Tehmina Batool; [2023]
    Nyckelord :;

    Sammanfattning : This paper analyzed the eco-efficiency of 35 sectors in Sweden by using an outputoriented Stochastic Frontier Analysis (SFA) model. In the setup of the model, the total output of each sector was used as a good output, whereas Carbon dioxide (𝐶𝑂2), Nitrogen oxide (𝑁𝑂𝑥) and Carbon monoxide (CO) emissions were used as a bad output. LÄS MER

  3. 22. Wastewater Treatment at Kraft Pulp Mills : Effect of temporary effluents and mitigation measures

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

    Författare :Hodda Shariatmadari; [2023]
    Nyckelord :;

    Sammanfattning : Large amount of water is used in the pulp-and-paper industry. Consequently, large amount of wastewater is produced in the various production processes. In general, the pollutants of concern involve organic compounds, nutrients, including nitrogen and phosphorous, suspended solids, and chlorinated compounds. LÄS MER

  4. 23. Kvävegödslingens effekter på bladyta och trädkronor i tallbestånd

    Master-uppsats, SLU/Dept. of Forest Ecology and Management

    Författare :Carl Åhlund; [2023]
    Nyckelord :bladyteindex; tall; gödsling; trädkronor; barr lear area index; scots pine; fertilization; tree crowns; needles;

    Sammanfattning : Kvävegödsling är en produktionshöjande åtgärd som varit väl etablerad i Sverige genom åren. På grund av gödslingens miljöpåverkan och allmänt högre kunskap om gödsling så är skötselåtgärden inte lika frekvent utnyttjad som den var runt 70-talet. LÄS MER

  5. 24. Explicit consideration of microbes in quantification of gross N rates based on N-tracing model

    Master-uppsats, Göteborgs universitet/Institutionen för geovetenskaper

    Författare :Tsai-wei Tang; [2022-01-26]
    Nyckelord :N-tracing model; microbial biomass; gross N quantification; organic N; mineralization; immobilization;

    Sammanfattning : When studying the nitrogen cycle in soils, the principle of 15N isotope dilution and enrichment is commonly used to measure gross N transformation rates. The measuring data of both organic and inorganic nitrogen substrates are therefore be analysed by Ntrace model. LÄS MER

  7. 25. Biochar from separated digestate and pig manure as soil amendment

    Uppsats för yrkesexamina på avancerad nivå, SLU/Dept. of Soil and Environment

    Författare :Lovisa Nissen; [2022]
    Nyckelord :separation; screw press; incubation study; CO2 emission; N mineralization;

    Sammanfattning : The situation in and around the Baltic Sea, with large areas with hypoxia in the sea and areas in the watershed with a high concentration of animal farms, has led to a need to increase the nutrient recycling of animal manure. High levels of phosphorus (P) in the soil lead to leaching, and by reducing the P-level in organic fertilizers, this leaching can be reduced. LÄS MER