Sökning: "aeration"

Visar resultat 21 - 25 av 122 uppsatser innehållade ordet aeration.

  1. 21. Skumproblematik i avloppsreningen vid Holmen Bravikens pappersbruk : Orsak och lösningsförslag

    Master-uppsats,

    Författare :Isabelle Björklund; [2021]
    Nyckelord :massa- och pappersbruk; slamsvällning; COD:N:P; Extracellulära polymera ämnen; LSP; PCA; vedkomponenter;

    Sammanfattning : The treatment of industrial wastewater is an important measure to prohibit eutrophication and intoxication of lakes and oceans. Major industries often have location-basedwastewater treatment and to avoid undesired effluents it is essential to make it robust. LÄS MER

  3. 22. Optimizing Growth Conditions for Lactic Acid Bacteria

    Master-uppsats, Lunds universitet/Kemiteknik (CI)

    Författare :Lorenzo García Tejada; [2021]
    Nyckelord :Lactic Acid Bacteria; Optimization; Cell growth; Lactic acid production; Oxygen; Yeast extract; Wood hydrolysate; Poly-lactic acid; Chemical engineering; Technology and Engineering;

    Sammanfattning : High production titers are paramount in lactic fermentation processes aimed towards poly lactic acid (PLA) manufacturing. Optimization of the fermentation stage is therefore essential for the viability of the process. LÄS MER

  4. 23. Removal of per- and polyfluoroalkyl substances(PFAS) from contaminated leachate usingaeration foam fractionation

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Axel Krögerström; [2021]
    Nyckelord :PFAS; Foam Fractionation; Leachate; Removal Efficiency; Wastewater Treatment;

    Sammanfattning : Leachate from landfills is contaminated in many ways and per- and polyfluoroalkyl substances (PFAS)-contamination is one of them. Recent studies have demonstrated the environmental and human concerns of PFAS. Therefore, the treatment of leachate is important. LÄS MER

  5. 24. Greenhouse gas emissions from compacted peat soil

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

    Författare :Antonia Hartmann; [2021]
    Nyckelord :carbon dioxide; compression index; Peatland agriculture; recompression index; sand addition; soil compaction;

    Sammanfattning : Cultivated peat soils are a main driver for CO2 and N2O emissions, while the gas fluxes are dependent on intrinsic soil properties and land use. Sand addition into peat soils might reduce greenhouse gas (GHG) emissions and enhance soil strength, and thus the ability to tolerate soil compaction. LÄS MER

  7. 25. Numerical Study on Air Demand of Free Surface Flows in a Discharge Tunnel

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Institutionen för fysik och astronomi

    Författare :Jonathan Barassa; Rickard Nordlöf; [2020]
    Nyckelord :Computational Fluid mechanics; Hydropower; Air demand; Free surface flows; ANSYS Fluent;

    Sammanfattning : Aeration issued through a ventilation shaft is an important measure to prevent cavitation and large gauge pressure in flood discharge tunnels. In order to dimension the ventilation shaft appropriately, itis necessary to have a good understanding of the air-water flow in the tunnel. LÄS MER