Sökning: "Perlit"

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

  1. 1. Ammonium and nitrate sorption by biochar

    Master-uppsats, SLU/Dept. of Soil and Environment

    Författare :Yasser Alrhban; [2023]
    Nyckelord :biochar nitrogen; retention; dialysis; absorption; adsorption; ammonium; nitrate;

    Sammanfattning : Biochar has recently drawn attention due to its ability to increase soil fertility, sequester carbon and its expected effect on reducing the leaching of elements from the soil, especially nitrogen. The possibility of using biochar as a soil amendment to reduce the amount of nitrogen leaching, and then reducing the quantities of nitrogen fertilizers used in agriculture to avoid the bad environmental effects has become a matter of great interest. LÄS MER

  3. 2. Cirkulär hydroponi : Från urbant avfall till odlingssubstrat

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

    Författare :Izabella Karlsson; Maya Spencer; [2022]
    Nyckelord :Hydroponics; urban agriculture; circular economy; industrial symbiosis; Hydroponi; urban odling; cirkulär ekonomi; industriell symbios;

    Sammanfattning : Dagens samhälle är fullt av utmaningar vad gäller hållbarhet. En av de viktigaste frågeställningarna är hur mänskligheten kan tänka om jordbruket för att anpassa sig till den förväntade ökningen i efterfrågan på mat, och samtidigt göra jordbruket mer miljövänligt. LÄS MER

  4. 3. From Bloomery Furnace to Blast Furnace : Archeometallurgical Analysis of Medieval Iron Objects From Sigtuna and Lapphyttan, Sverige

    Kandidat-uppsats, KTH/Materialvetenskap

    Författare :Andreas Helén; Andreas Pettersson; [2019]
    Nyckelord :;

    Sammanfattning : During the Early Middle Ages, the iron production in Sweden depended on the bloomery furnace, which up to that point was well established as the only way to produce iron. Around the Late Middle Ages, the blast furnace was introduced in Sweden. LÄS MER

  5. 4. Smart Hydroponics : Conceptual Design of Hydroponic Plant System for Home Environment

    Master-uppsats, Luleå tekniska universitet/Institutionen för ekonomi, teknik och samhälle

    Författare :Erik Földhazy; [2018]
    Nyckelord :Industrial Design Engineering; User Experience; Sustainability; Product Design; Human- Centered Design; Hydroponics; Teknisk Design; Användarupplevelse; Hållbarhet; Produktdesign; Human-Centered Design; Hydroponik;

    Sammanfattning : Hydroponics is a method of cultivating plants without the use of soil. Soil acts as a growth medium which gives plants stability, provides nutrients and allows roots to be kept wet without drowning. In hydroponics the soil’s functions are replaced by synthesized methods. Stability comes from a substrate (i. LÄS MER

  7. 5. The Effect of Solidification time and Cooling rate on the Ultimate tensile Strength of Grey Cast Iron.

    Master-uppsats, KTH/Materialteknologi

    Författare :Dinesh Sundaram; [2018]
    Nyckelord :Lamellar graphite iron; tensile properties; pearlitic properties; cooling rate; solidification time; Magmasoft.;

    Sammanfattning : Tensile strength modelling is usually done to predict the mechanical properties of lamellargraphite iron considering microstructural features. This work attempts to create a simplifiedmodel incorporating cooling rate and solidification time without considering themicrostructural features. LÄS MER