Sökning: "phosphorus recycling"

Visar resultat 1 - 5 av 53 uppsatser innehållade orden phosphorus recycling.

  1. 1. 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

  3. 2. Potential for Enhanced Biological Phosphorus Removal in an activated sludge system for greywater

    Master-uppsats, Lunds universitet/Kemiteknik (CI)

    Författare :Mehrzad Ghassemi; [2022]
    Nyckelord :Greywater; EBPR; Phosphorus; Biological treatment; Water and environmental engineering; Technology and Engineering;

    Sammanfattning : As the world's population grows, concerns about water scarcity and rising pollution such as phosphorus and nitrogen have increased significantly. Greywater has been considered by researchers as an ideal alternative to fresh water for decades, and several projects have been implemented to treat and recycle it for various reuse purposes. LÄS MER

  4. 3. Continuous leaching of phosphorus from sewage sludge ash

    Uppsats för yrkesexamina på grundnivå, KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Författare :Sofie Göransson; [2022]
    Nyckelord :Ash leaching; Continuous stirred tank reactor; CSTR; Phosphorus recovery; Sewage sludge ash;

    Sammanfattning : The global demand for food is increasing. Different nutrients are used to increase growth in agriculture and are thus essential for the world ́s food supply. An important and common nutrient is phosphorus. It can be mined, in the form of phosphate, from phosphate rock. LÄS MER

  5. 4. Biogödningsmedel från sjögräs och tång : Ekonomiska förutsättningar att ersätta handelsgödsel

    Kandidat-uppsats, KTH/Hållbar utveckling, miljövetenskap och teknik

    Författare :Lisaveta Rudaya; Madeleine Skantz; [2022]
    Nyckelord :Seaweed; beach-wrack; commercial fertilizer; sustainable agriculture; circular economy; phosphorus; nitrogen; biofertilizer; Sjögräs; tång; släke; handelsgödsel; hållbart jordbruk; cirkulär ekonomi; fosfor; kväve; biogödsel;

    Sammanfattning : Världsbefolkningens tillväxt sätter stort tryck på livsmedelsproduktionen. För att bemöta den ökande efterfrågan på mat förbrukas stora mängder handelsgödsel i syftet att stimulera tillväxten hos grödor och öka jordbruksmarkens bördighet. LÄS MER

  7. 5. Exploring the role of business intermediaries to advance circular bioeconomy : multi case study on plant-essential nutrient recycling firms and users in Sweden

    Master-uppsats, SLU/Dept. of Economics

    Författare :Urankhaich Batsukh; [2022]
    Nyckelord :business model; circular bioeconomy; intermediary; nitrogen; nutrient recycling; phosphorus; sewage sludge; wastewater;

    Sammanfattning : Nitrogen (N) and phosphorus (P) are key biological nutrients for global crop production and are directly linked to global food security. Despite the enormous agricultural expansion in the past century, excessive use of these elements is causing biochemical imbalances that lead to overstepping the ‘planetary boundaries’ beyond what the earth can hold. LÄS MER