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Biogas production
Rybecký, Adam ; Toman, Filip (referee) ; Sitek, Tomáš (advisor)
Biogas is a stable and controllable renewable energy source that helps to reduce dependence on fossil fuels and thus reduces greenhouse gas emissions. Biogas production uses biodegradable waste, such as agricultural or food waste, thus contributing to the reduction of waste going to landfill. This bachelor thesis deals with the technology of biogas production by anaerobic digestion. The biogas production process is very sensitive to many factors where the main ones are pH in the fermenter, C/N ratio, temperature and hydraulic residence time. There are different biogas production technologies that are distinguished from each other by factors such as the dry matter content of the feedstock or by the temperature regime outside the fermenter. The most common technology for biogas production in practice is the wet fermentation method. The role of biogas in the energy mix of the Czech Republic, but also in the EU, will grow in the future, in its upgraded form to biomethane, as it is completely interchangeable with natural gas and can be used in any sector and in any form. The experimental part of this bachelor thesis deals with and describes the actual process of biogas production using wet anaerobic digestion technology and then evaluates the effects of selected factors such as temperature, nitrogen atmosphere, residence time and dilution of fermenter contents on the quality and quantity of biogas.
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Biomethane treatment in European region
Gutovský, Jan ; Houdková, Lucie (referee) ; Niesner, Jakub (advisor)
The main aim of this thesis is to provide information about biomethane production and its use in Europe. The thesis contains a brief description of the production of biomethane and a summary of the basic processing methods. The following section discusses the current utilization of biomethane in selected European countries. It focuses on describing the state of technology and regulations in these states.
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UTILIZATION OF BIOGAS IN TRANSPORT
Štylárek, Milan ; Zháňal, Lubor (referee) ; Vopařil, Jan (advisor)
Objective of this bachelor thesis is evaluating the possibility of utilization of biogas as an alternative fuel for combustion engines in traffic. Production and distribution of upgraded biogas is described as well as situation of its utilization in the world. This is followed by a comparison of situation in biomethan utilization in Czech republic and Sweden. There are explained barriers to commercial placing and its possible eliminating. In the end the model study of replacement of farm vehicle fleet for CNG vehicles is described.
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Biomethane production in biogas plants
Matoušek, Jakub ; Miklas, Václav (referee) ; Vondra, Marek (advisor)
This bachelor thesis deals with the production of biomethane in biogas plants. The introductory part presents the operation of the biogas plant, its inputs, components, and products. The main part of the thesis deals with the perspective of biomethane in the Czech Republic and Europe and progressive technologies for the conversion of biogas to biomethane. The basic principle, advantages and disadvantages of each upgrade method are given. Common technologies at the level of commercial readiness include high pressure water scrubbing, organic physical scrubbing, chemical scrubbing process, pressure swing adsorption and membrane separation. The mentioned methods of biogas upgrading are evaluated and compared with regard to their practical applicability in the Czech environment.
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Waste gas combustion
Krček, Robin ; Lisá, Hana (referee) ; Baláš, Marek (advisor)
This bachelor thesis deals with the issue of using waste gases as fuel. The first part is focused on the production processes, properties and composition of selected waste gases. The following part is an overview of the methods used in the treatment and removal of pollutants from the gas. Finally, technologies that generate electrical, thermal or mechanical energy by burning waste gases are summarized.
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New technologies for an efficient operation of biogas plants
Uhlířová, Marcela ; Máša, Vítězslav (referee) ; Vondra, Marek (advisor)
This bachelor thesis is focused on new technologies enhancing efficient operation of biogas plants. The introductory part describes operation of biogas plant, its products and issues. The main part of the thesis deals with description of three progressive technologies concerning biogas plants such as dry fermentation, hydrothermal pretreatment and biogas upgrading to biomethane. For each technology there is a description, advantages and disadvantages with regard to their practical applicability.
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Utilization of biogas in transport
Strnadel, Bronislav ; Kučera, Pavel (referee) ; Vopařil, Jan (advisor)
The subject of this bachelor’s thesis is the utilization of biogas as a fuel for vehicle engines. First of all, methods of production, upgrading and utilization of biogas are explained. Then the situation in the Czech Republic and in Sweden is compared. Next part of the thesis is focused on the vehicles which burn upgraded biogas or natural gas vehicles. Their construc-tion and the function of fuel system are described in detail. The dependence of shape of combustion chamber on engine performance and the issue of protection of valves and their seats are described in this chapter. In the last part, a business case study of utilization of bio-gas from a biogas station is elaborated.
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