Blar i NTNU Open på forfatter "Østgaard, Kjetill"
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Aerobic and anoxic biodegradability of amines applied in CO2-capture
Henry, Ingrid Annemarie; Kowarz, Viktoria Corina; Østgaard, Kjetill (Journal article; Peer reviewed, 2017)Integrated and sustainable waste handling is becoming essential in large scale employment of amine-based post combustion CO2 capture and storage (CCS). We have previously proven the feasibility of biological nitrogen removal ... -
Anaerobic digestion of pig manure supernatant at high ammonia concentrations characterized by high abundances of Methanosaeta and non-euryarchaeotal archaea
Nordgård, Anna Synnøve Røstad; Bergland, Wenche Hennie; Vadstein, Olav; Mironov, Vladimir; Bakke, Rune; Østgaard, Kjetill; Bakke, Ingrid (Journal article; Peer reviewed, 2017)We examined the effect of ammonium and temperature on methane production in high rate upflow anaerobic sludge bed reactors treating pig manure supernatant. We operated four reactors at two ammonium concentrations (‘low’ ... -
Biodrivstoff fra tare - Fermentering av alginat til etanol
Evensen, Ida Maria (Master thesis, 2011)Bioenergi er et viktig alternativ for erstatning av petroleumsbasert drivstoff, men det er fremdeles et stort behov for forskning og utvikling av prosesser som kan bedre dagens teknologi. Bioenergi inkluderer blant annet ... -
Biogas from Livestock Manure: Microbial Community Analysis of Biogas Reactors
Jacobsen Forsberg, Ida-Renée (Master thesis, 2012)The aim of this experiment was to monitor the microbial communities in two biogas reactors and evaluate the efficiency of denaturing gradient gel electrophoresis (DGGE) as a technique for visualizing shifts in the microbial ... -
Changes in the microbial community of an anammox consortium during adaptation to marine conditions revealed by 454 pyrosequencing
Gonzalez Silva, Blanca Magdalena; Rønning, Are J.; Andreassen, Ingrid Krogrud; Bakke, Ingrid; Cervantes, Francisco J.; Østgaard, Kjetill; Vadstein, Olav (Journal article; Peer reviewed, 2017)The anammox activity of a freshwater anammox consortium was strongly inhibited at low-salinity level. Stepwise adaptation from 0 to 3 g NaCl L−1 took 153 days. Further adaptation to high-salinity concentration (from 3 to ... -
Characterization of Airborne Microorganisms at Nationaltheatret Subway Station
Valen, Anja (Master thesis, 2011)Bioaerosols containing pathogenic microorganisms can have health implications when respired. Of special concern are potential bioterrorism attacks conducted by deliberate aerosolization of hazardous toxins or pathogenic ... -
Mapping anaerobic sludge bed community adaptations to manure supernatant in biogas reactors
Nordgård, Anna Synnøve Røstad; Bergland, Wenche Hennie; Bakke, Rune; Østgaard, Kjetill; Bakke, Ingunn (Journal article; Peer reviewed, 2018)In upflow anaerobic sludge bed (UASB) reactors, biomass present as granules allows for long solids retention time. Here, granules from a process treating pulp and paper industrial wastewater were successfully applied as ... -
Salinity as a driver for microbial community structure in reactors for nitrification and anammox
Silva, Blanca Magdalena Gonzalez (Doctoral theses at NTNU;2016:365, Doctoral thesis, 2016)The removal of nitrogen from wastewater has become an important part of the overall treatment process due to the significant impact of nitrogen compounds (NH4–N, NOx–N) on the environment and the more stringent legislation ... -
Understanding structure/function relationships in nitrifying microbial communities after cross-transfer between freshwater and seawater
Gonzalez Silva, Blanca Magdalena; Jonassen, Kjell Rune; Bakke, Ingrid; Østgaard, Kjetill; Vadstein, Olav (Peer reviewed; Journal article, 2021)In this study, nitrification before and after abrupt cross-transfer in salinity was investigated in two moving bed biofilm reactors inoculated with nitrifying cultures that had adaptation to freshwater (FR) and seawater ...