• Transient response to shock loads in biogas processes 

      Helgestad, Haiyun Zhang (Master thesis, 2006)
      Active culture which is in a semi steady state was extracted from an anaerobic digestion reactor, transferred to a continuously stirred batch reactor with rather small head space. 35±1ºC was controlled for the reactor to ...
    • Environmental production : use of waste materials in cement kilns in China 

      Wang, Ning (Master thesis, 2008)
      This report mainly talks about utilizing the cement kiln to dispose wastes. In China, there are huge amounts of wastes can be produced every year. China government pays more attention to the environmental protection. The ...
    • Biogas feed analysis 

      Song, Yuan (Master thesis, 2008)
      Biogas production is regarded as the best energy recovery process from wet organic solid wastes (WOSW). Feed composition, storage conditions and time will influence the compositions of feed to biogas processes. In this ...
    • Optimization of biomass gasification reactor using Aspen Plus 

      Sun, Ke (Master thesis, 2015-10-30)
      Biomass is an ideal renewable and clean energy resource. Counties all over the world are paying more and more attention to biomass because it can effectively reduce greenhouse effect due to its zero carbon dioxide emission. ...
    • Investigation to improve the coagulation process at Lillevik WWTP, Larvik 

      Kibiakova, Hanna (Master thesis, 2015-10-30)
      Investigation to improve the wastewater treatment, focusing on the coagulation process, at Lillevik WWTP has been performed. Four activities were carried out for this purpose: 1. Investigate variations and correlations for ...
    • Ponds and anaerobic digestion combination 

      Bjerkely, Magnus (Master thesis, 2015-10-30)
      Production of biogas from small farms in China is decreasing because of the decrease in farm animals at these farms. It is needed a replacement for the animal manure. The replacement looked into in this paper is an algae ...
    • Optimization of design and operation of anaerobic digestion reactors 

      Haddad, Arya (Master thesis, 2015-11-12)
      The sustainable provision of bio-methane plays a key role in the future energy supply and is a promising environmentally friendly solution for waste processing. With rising number and size of biogas power plants process ...
    • Investigation of Sludge in Anaerobic Sludge Bed Bioreactor 

      Guntoro, Hartantyo Seto (Master thesis, 2016)
      The variation in granular sludge properties from various up-flow anaerobic sludge bed (UASB) reactors and the application of coffee grit as a physical model to characterize granular sludge were investigated in this study. ...
    • Methane from Syngas by Anaerobic Digestion 

      Shah, Sanjay (Master thesis, 2016)
      Anaerobic digestion is a prominent green technology used for methane production from organic waste. Previous studies have shown that CH4 in AD can be increased by adding inorganic electron donors such as H2 and CO. These ...
    • Investigation of Bioprocess for Industrial Wastewater Treatment 

      Ghimire, Nirmal (Master thesis, 2016)
      A pilot scale Hybrid Vertical Anaerobic Biofilm (HyVABr) reactor was applied to the treatment of waste oil refinery wastewater. The reactor comprised a bottom anaerobic digestion stage operated as an Up-flow Anaerobic ...
    • Optimization of postable water treatment by coagulation 

      Salmi, Ingrid Kjær (Master thesis, 2016)
      Securing hygienic barriers and also removal of particles, natural organic matter and dissolved minerals are necessary factors in the treatment of surface water. The presence of natural organic matter has increased during ...
    • Grey-box models for estimation of heating times for buidings 

      Brastein, Ole Magnus (Master thesis, 2016)
      Energy-usage in buildings is responsible for a large part of the total demands on energy production. Models are required to estimate the heating and cooling times of buildings, thus allowing a control system to accurately ...
    • Are the energy pathways diverted by temperature in biological sulphide oxidation? 

      Vyshniakov, Valerii (Master thesis, 2017)
      Many wastewater streams contain sulphides. Their corrosiveness, toxicity and unpleasant odor makes necessary the application of removal techniques. In the present study the temperature effect (25-35 oC) and N/S ratio (<0.35) ...
    • Microbial catalysis of syngas fermentation into biofuels precursors - An experimental approach 

      Rai, Pratap Jung (Master thesis, 2017)
      Search for environment-friendly sustainable energy sources is of global interest due to continuous depletion of fossil fuels resources and excessive carbon dioxide emissions. Syngas fermentation is one of the promising ...
    • Experimental measurements of diesel spray in an inert gas generator 

      Weber, Lena Dyveke (Master thesis, 2017)
      A 90° Y-jet atomizing nozzle with 3 bores was experimentally tested in a science facility at University College of Southeast Norway. The nozzle is producing a diesel fuel spray for a pilot flame in an IGG system for marine ...
    • Modelling and simulation of syngas fermentation for the production of biofuels precursors 

      Kravchuk, Rostyslav (Master thesis, 2017)
      Production of acetic acid and ethanol by syngas fermentation process could be an alternative way of biofuel production, and is therefore of interest to study. In accordance to literature review, gas fermentation process ...
    • Embryo research of a reactor to produce CO2 hydrates 

      Hashemi, Sayed Ebrahim (Master thesis, 2017)
      The potential applications of carbon dioxide hydrate have attracted many interests over the past decade. CO2 transmission in the form of hydrate is an alternative way of transportation in CCS chain, however, the CO2 hydrate ...
    • Disintegration and Degradation of Fish Feed Pellets and Feces Under Aerobic Marine Conditions 

      Pupulawaththa, Anupama Wathsalani (Master thesis, 2018)
      Fish farming industry is a major food industry which cover significant parts of the nutritional requirement of the world’s population. Due to nutritional enrichment by uneaten pellets and fish feces, negative environmental ...
    • Biological reject water treatment by using moving bed biofilm reactors (MBBR) 

      Hashemi, Seyedbehnam (Master thesis, 2018)
      In this study two moving bed biofilm reactors (MBBRs) (i.e. the reactors called R1 and R2 respectively) were subjected to treat reject water from sludge dewatering. Such biological treatment was investigated for possible ...
    • Coagulation effects of biological sludge reject water treatment 

      Niazi, Sepideh (Master thesis, 2018)
      This thesis is study of methods for improving the coagulation process of municipal wastewater in Norway, carried out at the Knarrdalstrand wastewater treatment plant in Porsgrunn. In the study two main issue were considered ...