• Anaerobic Digestion of Aqueous Pyrolysis Liquid in ADM1 

      Raya, Dheeraj; Ghimire, Nirmal; Flatabø, Gudny Øyre; Bergland, Wenche Hennie (Peer reviewed; Journal article, 2021)
      Aqueous pyrolysis liquid (APL) is formed from pyrolysis of lignocellulosic biomass and is considered as a possible feed for anaerobic digestion (AD). APL is known to contain many components that can have a negative impact ...
    • Anaerobic Digestion of Hemicellulosic Sugars Implemented in ADM1 

      Karlsen, Vibeke Bredvold; Ghimire, Nirmal; Bakke, Rune; Bergland, Wenche Hennie (Peer reviewed; Journal article, 2020)
      Lignocellulosic biomass is a sustainable and renewable source for both solids like biochar and biomethane by anaerobic digestion (AD). Hot water extraction (HWE) improves the total utilization of the biomass and produces ...
    • 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’ ...
    • Analysing Aqueous Pyrolysis Liquid as feed for Anaerobic Digestion 

      Raya, Dheeraj (Master thesis, 2021)
      Lignocellulosic biomass contains cellulose and hemicellulose which makes it suitable for Anaerobic Digestion (AD) process. However, due to complexity of the lignocellulosic biomass, pretreatment methods should be used to ...
    • Analysing biocarbon from pyrolysis in anaerobic digestion 

      Mohajeri Nav, Nasim (Master thesis, 2022)
      Anaerobic digestion is one of the efficient processes to manage solid waste. With this technology, waste converts to energy by producing biogas with high content of methane. Methane is an alternative to fossil fuels, ...
    • Biogas reactor modeling with ADM1 

      Lyseng, Benjamin C.; Bergland, Wenche Hennie; Botheju, Deshai; Haugen, Finn; Bakke, Rune (HiT skrift, Research report, 2013-02-11)
    • Effect of Particulate Disintegration on Biomethane Potential of Particle-Rich Substrates in Batch Anaerobic Reactor 

      Tassew, Fasil Ayelegn; Bergland, Wenche Hennie; Dinamarca, Carlos; Bakke, Rune (Peer reviewed; Journal article, 2019)
      An investigation of particle disintegration was carried out using batch anaerobic reactors and a particle-rich substrate from pig manure supernatant. Two types of samples were applied, one high in suspended particles (raw ...
    • Effects of Psychrophilic Storage on Manures as Substrate for Anaerobic Digestion 

      Bergland, Wenche Hennie; Dinamarca, Carlos; Bakke, Rune (Journal article; Peer reviewed, 2014-08-05)
      The idea that storage can enhance manure quality as substrate for anaerobic digestion (AD) to recover more methane is evaluated by studying storage time and temperature effects on manure composition. Volatile fatty acids ...
    • Environmental impact assessment of biochar in anaerobic digestate 

      Indrebø, Thea Lucia Sauro (Master thesis, 2022)
      Climate change and unsustainable crop production are among the most prominent environmental issues and viable solutions must be looked for. A circular economy approach by recycling biochar-digestate back to agriculture as ...
    • Granular sludge bed processes in anaerobic digestion of particle-rich substrates 

      Tassew, Fasil Ayelegn; Bergland, Wenche Hennie; Dinamarca, Carlos; Kommedal, Roald; Bakke, Rune (Peer reviewed; Journal article, 2019)
      Granular sludge bed (GSB) anaerobic digestion (AD) is a well-established method for efficient wastewater treatment, limited, however, by the wastewater particle content. This review is carried out to investigate how and ...
    • High rate manure slurry anaerobic digestion 

      Bergland, Wenche Hennie; Dinamarca, Carlos; Toradzadegan, Mehrdad; Nordgård, Anna Synnøve Røstad; Bakke, Ingrid; Bakke, Rune (Journal article, 2015)
      The study shows that high rate anaerobic digestion may be an efficient way to obtain sustainable energy recovery from slurries such as pig manure. High process capacity and robustness to 5% daily load increases are observed ...
    • High rate manure supernatant digestion 

      Bergland, Wenche Hennie; Dinamarca, Carlos; Toradzadegan, Mehrdad; Nordgård, Anna Synnøve Røstad; Bakke, Ingrid; Bakke, Rune (Journal article; Peer reviewed, 2015)
      The study shows that high rate anaerobic digestion may be an efficient way to obtain sustainable energy recovery from slurries such as pig manure. High process capacity and robustness to 5 % daily load increases are observed ...
    • Influences of temperature and substrate particle content on granular sludge bed anaerobic digestion 

      Tassew, Fasil Ayelegn; Bergland, Wenche Hennie; Dinamarca, Carlos; Bakke, Rune (Peer reviewed; Journal article, 2019)
      Influences of temperature (25–35 °C) and substrate particulate content (3.0–9.4 g total suspended solids (TSS)/L) on granular sludge bed anaerobic digestion (AD) were analyzed in lab-scale reactors using manure as a substrate ...
    • Liquefaction of lignocellulosic biomass for methane production: A review 

      Ghimire, Nirmal; Bakke, Rune; Bergland, Wenche Hennie (Peer reviewed; Journal article, 2021)
      Hydrothermal pretreatment (HTP) (Hot water extraction (HWE) and steam pretreatment) and pyrolysis have the potential to liquefy lignocellulosic biomass. HTP produces hydrolysate, consisting mainly of solubilized hemicellulose, ...
    • 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 ...
    • Methane from Syngas by Anaerobic Digestion 

      Shah, Sanjay; Bergland, Wenche Hennie; Bakke, Rune (Journal article; Peer reviewed, 2017)
      Anaerobic digestion (AD) is a prominent green technology used for methane production from organic waste. Previous studies have shown that the amount of CH4 produced during anaerobic digestion can be increased by adding ...
    • Modeling temperature effects in anaerobic digestion of domestic wastewater 

      Lohani, Sunil Prasad; Wang, Shuai; Bergland, Wenche Hennie; Khanal, Sanjay Nath; Bakke, Rune (Journal article, 2018)
      A combination of septic tank (ST) and up-flow anaerobic sludge blanket (UASB) as treatment for domestic wastewater was modeled with the anaerobic digestion model 1 (ADM1). The model was used to visualize the influence of ...
    • Modelling anaerobic digestion during temperature and load variations 

      Bergland, Wenche Hennie; Bakke, Rune (Journal article; Peer reviewed, 2016)
      Experimental results and simulations based on the Anaerobic Digestion Model No.1 (ADM1) with temperature effects on kinetics were used to evaluate rate limiting steps in sludge bed anaerobic digestion (AD) during load and ...
    • Modelling heat treated lignocellulosic material as substrate in anaerobic digestion 

      Rasti, Alireza (Master thesis, 2022)
      Energy and material production from lignocellulosic (wood) waste material receives increased interest as a carbon neutral economic feasible option. The master study will be carried out to gain more knowledge related to ...
    • Modelling temperature transition and co-digestion in VEAS biogas process 

      Mikelsone, Veronika (Master thesis, 2021)
      Anaerobic digestion (AD) is a well-established way to stabilise concentrated sludge produced in wastewater treatment (WWT) plants. The benefit of the process is the production of biomethane and digestate that can be used ...