• Biological hydrogen sulfide removal with nitrate 

      Sposob, Michal (Doctoral dissertations at the University of South-Eastern Norway;11, Doctoral thesis, 2018-09-28)
      Aim: Hydrogen sulfide is a major occupational hazard in agriculture, industry, and sewage processing; its presence leads to corrosion. Thus, hydrogen sulfide removal is obligatory. These investigations aim to evaluate the ...
    • Bubbling Fluidized Bed Behaviour for Biomass Gasification 

      Agu, Cornelius Emeka (Doctoral dissertations at the University of South-Eastern Norway;35, Doctoral thesis, 2019-06-21)
      The need to cut down the high dependency on the fossil fuels requires sustainable alternative energy resources. Aside that the stock of fossil fuels is depreciable, the energy source also accounts for the major contribution ...
    • Capabilities of anaerobic granular sludge bed process for the treatment of particle-rich substrates 

      Tassew, Fasil Ayelegn (Doctoral dissertations at the University of South-Eastern Norway;56, Doctoral thesis, 2020-01-17)
      High-rate anaerobic reactors have qualities that make them more attractive for anaerobic digestion of organic substrates compared to traditional reactors such as Continuous Stirred Tank Reactor (CSTR). These qualities ...
    • Carbon Dioxide Capture by Chemical Absorption: Energy Optimization and Analysis of Dynamic Viscosity of Solvents 

      Arachchige, Udara Sampath P. (Doctoral dissertations at the University of South-Eastern Norway;26, Doctoral thesis, 2019-02-11)
      Global warming resulted from the emissions of greenhouse gases; especially carbon dioxide has received widespread attention. The concentration of CO2 in the atmosphere reaches 400 ppmv and that is a considerably high value ...
    • Cost estimation methods for CO2 capture processes 

      Aromada, Solomon Aforkoghene (Doctoral dissertations at the University of South-Eastern Norway;140, Doctoral thesis, 2022-10-12)
      Cost engineering and economic assessment play a crucial role in evaluation of CO2 capture technologies and energy systems. Cost is one of the key decisive factors when considering industrial deployment of a technology. ...
    • Data Driven Models for Estimation of Drilling Fluid Rheological Properties and Flow Rate 

      Jondahl, Morten Hansen (Doctoral dissertations at the University of South-Eastern Norway;65, Doctoral thesis, 2020-05-11)
      Pressure control during well drilling operations includes management of the well pressure above the formation pore pressure and below the formation fracture pressure. If these boundaries are not kept, an influx of formation ...
    • Degradation of Aqueous 2-Amino-2-methyl-1-propanol for Carbon Dioxide Capture 

      Wang, Tielin (Doctoral dissertations at TUC;2013:1, Doctoral thesis; Peer reviewed, 2013-01-29)
      Absorption-stripping with aqueous 2-amino-2-methyl-1-propanol (AMP), and especially AMP blends with other amines, such as monoethanolamine (MEA) and piperazine (PZ), presents an attractive option for carbon dioxide (CO2) ...
    • Degradation of polymeric and particulate organic carbon in biofilms 

      Kommedal, Roald (Doctoral theses at NTNU;2003:101, Doctoral thesis; Peer reviewed, 2003)
      Polymeric and particulate organic carbon (POM) are fundamental compounds in the global cycling of carbon, and constitute significant amounts of BOD in municipal wastewater. The main objective of this work is to study ...
    • Dynamics and Control for Efficient Fertilizer Processes 

      Vesjolaja, Ludmila (Doctoral dissertations at the University of South-Eastern Norway;105, Doctoral thesis, 2021-10-11)
      Granulation processes have been a subject of research for more than 60 years. During these years of research, there has been a significant improvement in qualitative and quantitative knowledge of the granulation processes, ...
    • Dynamics and model analysis of hydropower systems 

      Vytvytskyi, Liubomyr (Doctoral dissertations at the University of South-Eastern Norway;37, Doctoral thesis, 2019-09-06)
      Globalization and growth in energy consumption in combination with climate challenges, make the use of sustainable energy production a necessity. Important sustainable energy sources (solar, wind) are intermittent in ...
    • Electrochemical Unit Integration with Biogas Production Processes 

      Nelabhotla, Anirudh Bhanu Teja (Doctoral dissertations at the University of South-Eastern Norway;62, Doctoral thesis, 2020-03-27)
      Power to Gas (PtG) is being viewed as systemic innovation in terms of integrating renewable electricity systems and wastewater treatment systems to provide renewable transport fuel. The highly varied nature of the sun and ...
    • Empirical modeling, state estimation, and process control with real-life applications to the Czochralski crystallization process 

      Komperød, Magnus ((Doctoral dissertations at TUC;2012:1, Doctoral thesis; Peer reviewed, 2012-05-24)
      This PhD thesis presents research work within the field of systems and control engineering, with emphasis on applications to real-life processes, the Czochralski (CZ) crystallization process in particular. During the PhD ...
    • Experimental and theoretical studies of rapid phase transitions in CO2 

      Hansen, Per Morten (Doctoral dissertations at the University of South-Eastern Norway;13, Doctoral thesis, 2018-10-19)
      Rapid depressurization and evaporation of a pressurized liquefied gas are phenomena of relevance to hazard identification and risk analysis in the process industry. Tank explosions and pipeline ruptures are accident scenarios ...
    • Experimental Study of Deflagration to Detonation Transition in Hydrogen-Air Mixtures 

      Gaathaug, André Vagner (Doctoral dissertations at TUC;2015:1, Doctoral thesis; Peer reviewed, 2015-04-29)
      Gas explosions in a square channel have been investigated with a main focus on the deflagration to detonation transition (DDT). The gas mixtures were hydrogen and air at different concentrations. This work have been motivated ...
    • Gas explosions in process pipes 

      Kristoffersen, Kjetil (Doctoral theses at NTNU;2004:79, Doctoral thesis; Peer reviewed, 2004)
      In this thesis, gas explosions inside pipes are considered. Laboratory experiments and numerical simulations are the basis of the thesis. The target of the work was to study gas explosions in pipes and to develop numer- ...
    • Human Behaviour Modelling for Welfare Technology 

      Sánchez, Veralia Gabriela (Doctoral dissertations at the University of South-Eastern Norway;63, Doctoral thesis, 2020-03-31)
      Elderly populations are increasing in Norway, Scandinavia and other developed countries, in part because people are living longer due to medical advances. This is associated with several societal challenges, including an ...
    • Hydrogen leaks in partially confined spaces - dispersion and explosions 

      Sommersel, Ole Kristian (Doctoral dissertations at the University of South-Eastern Norway;31, Doctoral thesis, 2017-12-12)
      In Porsgrunn, Norway, there was an explosion in an ammonia plant in July 1985. The accident was caused by a hydrogen leak inside a factory building, called N1. The result was a severe hydrogen-air explosion and jet fire, ...
    • Hydrogen safety in confined spaces 

      Lach, Agnieszka Weronika (Doctoral dissertations at the University of South-Eastern Norway;130, Doctoral thesis, 2022-09-02)
      Unwanted hydrogen releases in confined spaces can be significantly more dangerous compared to open-air scenarios. The transmission towards a zero-emission system results in a growth of hydrogen-driven vehicles which increases ...
    • Identification of signals describing pairwise interaction in plankton, bacteria and bacteriophage : a study of model, microcosm and lake 

      Sandvik, Gunnar (Doctoral theses at NTNU;2003:54, Doctoral thesis; Peer reviewed, 2003)
      This study concerns interaction between organisms. Such interactions are often studied through organism abundances over periods of time (time-series). Time-series reflect both internal (biological) and external (environmental) ...
    • An Image Processing Framework for High Speed Videos from Combustion and Gas Explosion Experiments 

      Maharjan, Samee (Doctoral dissertations at the University of South-Eastern Norway;83, Doctoral thesis, 2020-12-18)
      The method of high speed photography is used to visualize those phenomena which occur so fast that it is impossible to visualize by the normal human eyes. One of those phenomena is a shock wave propagation during gas ...