Sökning: "aeration"

Visar resultat 6 - 10 av 122 uppsatser innehållade ordet aeration.

  1. 6. Growing on the roof : But in what? Examing substrates/growing media for rooftop farming

    Kandidat-uppsats, SLU/Dept. of Landscape Architecture, Planning and Management (from 130101)

    Författare :Mikael Brocki; [2023]
    Nyckelord :urban rooftop agriculture; URTA; green roof; substrate; growing medium; organic matter; compost; vegetable; crop; yield; lettuce; tomato; pore; pore-size distribution;

    Sammanfattning : Urban Rooftop Agriculture (URTA) is a novel field within urban vegetable production, which can help create access to local food in a rapidly urbanizing world. For these systems to succeed, it is vital to implement a proper choice of substrate/growing medium (SGM). LÄS MER

  3. 7. 1D Simulation of Hydraulic Cam Phaser System Utilized in Heavy Duty Vehicles : An Investigation on Attenuation of Phase Oscillations from Cam Torque Disturbances

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Författare :Johan Germundsson; [2023]
    Nyckelord :master thesis; cam phaser; simulation; 1D-simulation; GT-SUITE; GT-ISE; Gamma Technologies; oil aeration; oscillations; heavy-duty; engine; phaser; cam torque; stability; cam phaser system; Scania; Scalia CV;

    Sammanfattning : Cam phasers allow improvements to the efficiency and emissions of internal combustion engines. The usage of hydraulic vane type cam phasers for heavy-duty applications have shown problems with oscillations during testing at Scania CV. To investigate the root cause of the oscillations a detailed 1-d simulation model has been created. LÄS MER

  4. 8. Ammonium-Based Aeration Control with Iterative Set-Point Tuning in Wastewater Treatment Plants

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Avdelningen för systemteknik

    Författare :Tom Bärnheim; [2023]
    Nyckelord :adaptive control; ammonium-based aeration control; ammonium feedback control; iterative set-point tuning; process control; wastewater treatment;

    Sammanfattning : In wastewater treatment plants, the amount of ammonium is one example of a measure to determine the quality of the effluent wastewater. Ammonium is regarded as a hazardous chemical for aqueous ecosystems and can cause eutrophication due to its high nitrogen content. LÄS MER

  5. 9. 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

  7. 10. Numerisk modellering av tvåfasströmning och syretransport i bubbelkolumner : Metodutveckling för att förutsäga syretransportshastigheten i rent vatten och surfaktantlösningar

    Master-uppsats, Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

    Författare :Fredrik Andersson; [2022]
    Nyckelord :Bubbelströmning; bottenluftning; syresättning; surfaktanter; computational fluid dynamics;

    Sammanfattning : I samband med det globala samhällets ökande populationsmängd och ekonomiska utveckling ökar färskvattenkonsumtionen och mängden avloppsvatten som produceras. Avloppsvatten behöver renas innan det släpps ut för att inte påverka miljön negativt. LÄS MER