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With a little help from my friends: "understanding the roles and importance of the millipede gut microbiome"
NWEZE, Julius Eyiuche
This research aimed to elucidate the role and importance of the millipede gut microbiome in cellulose digestion by using inhibitors to disrupt potential host-symbiosis and assessing their effects on millipede digestion and overall health. It involved the first comprehensive profiling of microbial communities within the hindgut and faeces of two distinct millipede species: Epibolus pulchripes, a tropical species found on the East African coast, and Glomeris connexa, a temperate species native to Central Europe. Although both species share a similar detritivorous lifestyle, they differ in size and gut redox conditions, with G. connexa being smaller (10-17 mm) than E. pulchripes (130-160 mm). The study also revealed the potential of the hindgut bacterial community in breaking down complex polysaccharides and recycling nutrients. It described the active bacterial community vital for certain processes and the extent of the millipedes' dependence on them. Additionally, the research provided a comprehensive investigation of viral communities in the hindguts of the two millipedes and their role in enhancing metabolism and modulating microbial composition. Furthermore, it introduced a new perspective that millipedes primarily ingest litter to gain access to microbial biomass (primarily fungal), which they and their gut microbiota consume.
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Biogas technologies
Martanová, Iveta ; Jecha, David (referee) ; Beňo, Zdeněk (advisor)
This bachelor's work deals with technology of conception and production of biogas from biodegradable waste. In the introductory part there is elaboration of biogas facts, the principle of biogas origin and the usage of biogas in practice. The main part is dedicated to individual technology of the biogas production. There are descriptions of technological equipment for gas producing and descriptions of individual methods of waste processing indicating their advantages and disadvantages.
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Combi-cycle power plant
Tkachuk, Andriy ; Borbély, Richard (referee) ; Fiedler, Jan (advisor)
This bachelor thesis analyzes the combi-cycle, the advantage of which is easy separation of CO2 for its storage and further usage. The first part shortly presents the currently used cycles and introduces the Graz cycle. It also lists its advantages and disadvantages. The second part focuses on the description of the calculation of thermal efficiency of the cycle and the calculation itself. The calculation is attached in a separate .XLS file. At the end of the thesis, the result of the calculation is interpreted and the conditions under which the project would be realized are outlined.
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Combi-cycle power plant
Tkachuk, Andriy ; Fiedler, Jan (referee) ; Škorpík, Jiří (advisor)
This master thesis follows the bachelor thesis with the same name. It is looks into the analyses of the combi-cycle, the advantage of which is high efficiency and easy separation of CO2 for its storage and further usage. It introduces the Graz cycle, its thermal balance a basic arrangement. The calculation is attached in a separate .XLS file. At the end of the thesis, the result of the calculation is interpreted and the conditions under which the project would be realized are outlined.
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Failure rate wastewater treatment plants
Boryśová, Michaela ; Vlčková, Veronika (referee) ; Hluštík, Petr (advisor)
This thesis deals with the sludge management in wastewater treatment plants. It provides a basic overview of methods for modifying risk material in sludge ending. The main goal of this work is to create a fault trees based on faults which occurred in the sludge management facilities. Furthermore, it was created frequency of failures assessment of the objects on wastewater treatment plant in Hodonín. Provided information were obtained during excursions of WWTP Hodonín and Zbýšov.
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Landfill Sites and Landfill Gas Risks
Klímová, Zdeňka ; Vávrová, Milada (referee) ; Valášek, Rudolf (advisor)
This work is focused on landfills and landfill gas that is created by decomposition of organic substances. Municipal waste, its origin, properties, practical use and risks related to landfill gas are discussed. At the end of the theoretical section the limits of explosiveness are specified. The practical section deals with the most important properties of methane and carbon dioxide. A photograph of a landfill site, located in Brno – Černovice, is included in the final section.
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Alternative fuels for SI engines
Balažovič, Lukáš ; Ušiak, Michal (referee) ; Štětina, Josef (advisor)
This bachelor thesis deals with the topic of alternative fuels for petrol engines. The first is a brief introduction to the issue of petrol engines, followed by a description of each alternative fuel. The thesis summarizes the most important information and comparison of alternatives with conventional gasoline is made. Each fuel is evaluated in terms of advantages, disadvantages, and position on the market.
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Semiconductive gas sensors for detection of organic gases and vapours
Šedivý, Matúš ; Gablech, Evelína (referee) ; Gablech, Imrich (advisor)
This bachelor thesis is focused on gas sensors. Basic characteristics of sensors are discussed in the first part. Next part contains an overview of the most used types of gas sensors based on different physical principles. The main aim of thesis outlines last chapter where process of making gas sensors with different semiconductive metal oxides active layers is described. This thesis also describes measuring of their characteristics and characteristics of commercial gas sensor TGS 822 made by Figaro. Measured data are processed in graphs and tables and then were used for comparison with created sensors. In conclusion, there are discussed possibilities of improving selectivity of gas detection by using sensors with different active layer.
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Redukce metanu u přežvýkavců pomocí výživy
Pávišová, Aneta
The bachelor thesis "Methane reduction in ruminants by means of nutrition", provides a comprehensive overview of the ways in which methane production in ruminants can be reduced within the limits of possibility. The thesis discusses the addition of feed additives to the ration, the manipulation of feed components in the ration and the influence of feeding techniques. Finally, it describes alternative methods of methane reduction, such as the use of vaccines in ruminant breeding or the use of genetic selection. Livestock are responsible for up to 18% of anthropogenic greenhouse gas emissions and this figure is estimated to increase further. At the same time, the formation of methane in the rumen results in a loss of energy from feed of up to 12 %. The use of feed additives in the ration rather than ration modification alone appears to be effective. The type of animal, housing management and individuality of the animals are very important. It is important to design and research both new and existing measures in order to establish clear feeding practices and reduce the economic losses of the farm.
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Microbial assemblages associated with methane release from the Greenland ice sheet
Znamínko, Matěj ; Stibal, Marek (advisor) ; Cameron, Karen (referee)
Subglacial environments provide conditions suitable for the microbial production of methane, an important greenhouse gas, which can be released from beneath the ice as a result of glacial melting. High gaseous methane emissions have recently been discovered at Russell Glacier, an outlet of the southwestern margin of the Greenland Ice Sheet, acting not only as a potential climate amplifier but also as a substrate for methane-consuming microorganisms. Here, we describe the composition of the microbial assemblage exported in meltwater from the methane release hotspot at Russell Glacier and its changes over the melt season and as it travels downstream. We found that a substantial part (27.1 %) of the exported assemblage was made up of methylotrophs and that the relative abundance of methylotrophs increased as the melt season progressed, likely due to the seasonal development of the glacial drainage system. The methylotrophs were dominated by representatives of Type I methanotrophs from the Gammaproteobacteria; however, their relative abundance decreased with increasing distance from the ice margin at the expense of methylotrophs from the Betaproteobacteria and Type II methanotrophs (Alphaproteobacteria). These changes could be attributed to the different physiological demands of these groups. Our...
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