Sökning: "free water surface wetland"

Visar resultat 1 - 5 av 13 uppsatser innehållade orden free water surface wetland.

  1. 1. Constructed wetland for post-treatment of phosphorus in wastewater : An initial assessment of potential design and application to a small-scale water treatment plant in Åre municipality, Sweden

    Kandidat-uppsats, Mittuniversitetet/Institutionen för naturvetenskap, design och hållbar utveckling (2023-)

    Författare :Johan Arnemo; [2023]
    Nyckelord :: cold climate; ecological engineering; free water surface wetland; horizontal subsurface wetland; phosphorus treatment;

    Sammanfattning : In recent years, the treatment of phosphorus in Nyland's water treatment plant (located in Åre municipality) has been substandard. The problem has persisted despite attempts to lower the concentration to meet the emission requirements. LÄS MER

  3. 2. Modeling BOD removal in free watersurface constructed wetlands with variable residence time-based methods

    Master-uppsats, Lunds universitet/Avdelningen för Teknisk vattenresurslära

    Författare :Degefu Yohannes Sebro; [2021]
    Nyckelord :BOD removal; Free water-surface constructed wetlands; VART-BOD; models; dynamic diffusion zone; Technology and Engineering;

    Sammanfattning : Constructed wetlands (CWs) have been applied for several years in the removal process pollutants from secondary treatment plants and stormwater. In this paper, the Variable Residence Time (VART) model for solute transport in streams was extended to simulate the BOD removal process in free water surface flow constructed wetlands (FWS CWs). LÄS MER

  4. 3. Phosphorus accumulation in a free water surface wetland discharging into the Baltic Sea

    Master-uppsats, SLU/Dept. of Aquatic Sciences and Assessment

    Författare :Manuela Watschka; [2021]
    Nyckelord :free water surface wetland; phosphorus accumulation; internal loading; sediment accumulation;

    Sammanfattning : Eutrophication has been an issue of the Baltic Sea for a long time, causing de-creased water clarity due to enhanced growth of algae and oxygen depletion dur-ing the decomposition of algae. The study investigated the free water surface wetland Vilhelmsberg that treats agricultural runoff before the water reaches the Baltic Sea. LÄS MER

  5. 4. Mikroplast i dagvatten och spillvatten : Avskiljning i dagvattendammar och anlagda våtmarker

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Luft-, vatten- och landskapslära

    Författare :Robert Jönsson; [2016]
    Nyckelord :microplastics; stormwater; urban runoff; sewage; wastewater; constructed wetlands; stormwater ponds; mikroplast; dagvatten; spillvatten; anlagda våtmarker; dagvattendammar;

    Sammanfattning : Mikroplast, här definierat som plastobjekt mindre än 5 mm, befaras kunna göra stor skada på vattenlevande djur. Fram tills idag har studier av mikroplastreduktion främst utförts i kommunala avloppsreningsverk där mycket av plasten avskiljs. LÄS MER

  7. 5. Removal efficiency of indicator organisms and tetM prevalence in enterococci in a constructed wetland for wastewater treatment

    Kandidat-uppsats, Örebro universitet/Institutionen för naturvetenskap och teknik

    Författare :Linnea Olsson; [2013]
    Nyckelord :Removal efficiency; constructed wetland; indicator organisms; Enterococccus; tetM gene; wastewater treatment;

    Sammanfattning : Indicator organisms like coliforms, E. coli and enterococci are normally associated with the intestinal tract of warm-blooded animals, and can thus be used for indicating fecal contamination of water. LÄS MER