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Combined Heat and Biogas Production Using Bioreactor
Brachetka, Jan ; Radil, Lukáš (referee) ; Baxant, Petr (advisor)
The bachelor's thesis deals with the use of anaerobic digestion in households to process biological waste and produce biogas. The goal of this work is to design a small-scale household anaerobic biodigester which, thanks to the possibility of continuous feeding with fresh material, will be capable of uninterrupted operation and biogas generation. The introduction defines the principle of aerobic digestion. The main part of the theoretical analysis is devoted to the description of anaerobic digestion and the factors that condition its formation. The basic properties and composition of biogas, as well as the types of household bioreactors, are also described here. Subsequently, the thesis focuses mainly on the design and construction of a household bioreactor, its commissioning, and evaluation of its energy balance.
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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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Energy balance of biomass heating plant
Žmolík, Václav ; Šen, Hugo (referee) ; Baláš, Marek (advisor)
This thesis deals with a design of a biomass heating plant combinating a Rankin-Clausius cyklus and a CHP unit. The CHP unit fuel is a biogas and the boiler fuel is a wooden chip. The adapted CHP unit regenerates feed-water of the R-C cycles. This design is technicaly and economicalty compared with the Rankin-Clausius cycle without feed-water regeneration by the CHP unit.
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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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Natural gas
Trávníček, Zdeněk ; Moskalík, Jiří (referee) ; Pospíšil, Jiří (advisor)
The aim of the bachelor thesis is to collect facts about natural gas, focusing mainly on the situation in the Czech Republic. Firstly, the thesis discusses the natural gas in general - its properties, world resources, ways of production and usage. The main part of the thesis deals with supply and accumulation of natural gas in the Czech Republic. Secondly, enumeration and brief description of possibilities of natural gas substitution is presented. Finally, comparison of usage of classic non-condensing and condensing boiler for a family house heating is introduced. Recommendation of boiler type based on the model example is included as well.
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Treatment of waste from biogas plants
Budín, Oto ; Frýba, Lukáš (referee) ; Vondra, Marek (advisor)
This bachelor thesis is focused on options of treatment of waste from biogas plants. The first part of this thesis describes biogas plants and its working. The main target of the thesis deals with waste from biogas plants – its creation, properties, composition and application. The thesis also includes an overview of legislative and environmental restrictions applying to the treatment of waste from biogas plants. The bachelor thesis also comprises an information about biogas plants Stanoviště.
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Modern Biogas Station as Part of "Smart Regions"
Horák, Jakub ; Pavel,, Milčák (referee) ; Lisý, Martin (advisor)
This thesis deals with the design of computational model of a biogas plant and its use in the concept of intelligent region with focusing on district heating and cooling network. The introduction contains review of technology used in the biogas plant. This review covers the description of modern biogas plants and determination of the energy and technology parameters for computational model of biogas plant. The next part of thesis describes analyze of the dynamics of the operation and the possibilities of using waste heat from biogas plant. The last and also the most important part is based on design of computational model of a biogas plant and design of connection of a biogas plant to the district heating and cooling network.
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Biogas cleaning to substitute natural gas quality
Němec, Jan ; Niesner, Jakub (referee) ; Dvořák, Radek (advisor)
This work deals with methods of biogas cleaning to natural gas quality for further use. The introduction is focused on technologies for biogas treatment and biogas management for current situation in the Czech Republic. In the main chapter there is a water scrubber technology design and calculation of the absorption column for the conditions given. A simulation model and preliminary economic balance were then developed on the obtained data.
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