Search for dissertations about: "bacterial denitrification"

Showing result 1 - 5 of 20 swedish dissertations containing the words bacterial denitrification.

2. 1. Structure and function of microbial communities in constructed wetlands - influence of environmental parameters and pesticides on denitrifying bacteria

   Author : Susann Milenkovski; Biologiska institutionen; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; fungicide; concentration-response curves; nosZ; nirS; nirK; bacterial activity; denitrification; bacterial community composition; herbicide; insecticide;

   Abstract : This thesis addresses the interactions and relationships between natural aquatic bacterial communities, environmental parameters, anthropogenic chemicals and the denitrification pathway in the habitat of agricultural constructed wetlands. The main aim was to gain fundamental knowledge of the drivers behind the processes of the denitrification (i.e. READ MORE

4. 2. Characterization of Bacterial Biofilms for Wastewater Treatment

   Author : Sofia Andersson; Gunnel Dalhammar; Bo Mattiasson; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; biofilm; extracellular polymeric substances; exopolysaccharides; interspecies interactions; wastewater treatment; denitrification; phosphorus removal; Microbiology; Mikrobiologi;

   Abstract : Research performed at the Division of Environmental Microbiology has over the last years resulted in the isolation of possible bacterial key-organisms with efficient nutrient removal properties (Comamonas denitrificans, Brachymonas denitrificans, Aeromonas hydrophila). Effective use of these organisms for enhanced nutrient removal in wastewater treatment applications requires the strains to be retained, to proliferate and to maintain biological activity within theprocess. READ MORE

5. 3. Denitrification: from genes to ecosystems

   Author : Christopher Jones; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES;

   Abstract : Denitrification is a part of the global nitrogen cycle in which fixed nitrogen in the biosphere is returned to the atmosphere, which is mediated by diverse communities of microorganisms. This thesis seeks to gain a greater understanding of the ecology of denitrifying microorganisms by examining the pathway from four different aspects; gene, population, community, and ecosystem. READ MORE

6. 4. Biodiversity and ecosystem functioning in created agricultural wetlands

   Author : Geraldine Thiere; Stefan Weisner; Högskolan i Halmstad; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; constructed ponds; eutrophication abatement; biodiversity conservation; functional diversity; macroinvertebrates; plants; bacterial denitrification; watershed scale; nitrogen removal; phosphorus retention; Terrestrial; freshwater and marine ecology; Terrestrisk; limnisk och marin ekologi; watershed scale; bacterial denitrification; plants; macroinvertebrates; functional diversity; biodiversity conservation; constructed ponds; eutrophication abatement; nitrogen removal; phosphorus retention;

   Abstract : This doctoral dissertation was produced in a cooperation between Halmstad University (Wetland Research Centre, School of Business and Engineering) and Lund University (Limnology & Marine Biology, Department of Ecology).Abstract . READ MORE

7. 5. Biofilms in Nitrogen Removal - Bacterial Population Dynamics and Spatial Distribution

   Author : Robert Almstrand; Göteborgs universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; AOB; NOB; biofilms; image analysis; FISH; Nitrosomonas; population dynamics; spatial distribution;

   Abstract : Efficient nitrogen removal at wastewater treatment plants (WWTPs) is necessary to avoid eutrophication of recipient waters. The most commonly used approach consists of aerobic nitrification and subsequent anaerobic denitrification resulting in the release of dinitrogen gas into the atmosphere. READ MORE