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Temperature control in bioreactor
Pospíchal, Zbyněk ; Václavek, Pavel (referee) ; Blaha, Petr (advisor)
This thesis deal with improvement behavior of temperature control in bioreactor. It was created model of system. Basic PI controller could solve all problems. After analysis of system were decided to used fuzzy controller. Fuzzy controller in comparison with classic PI controller has better behavior in this application.
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Production of PHB-HV from grape pomace by employing a pure culture of Cupriavidus necator
Jakešová, Michaela ; Kučera, Dan (referee) ; Kovalčík, Adriána (advisor)
This bachelor thesis deal with the production of PHB-HV copolymer employing a pure culture of Cupriavidus necator H16. First, Erlenmeyer flask´s cultivations using pure fructose as a source of carbon were performed. The mode of addition of valeric acid for the synthesis of PHB-HV was studied. Furthermore, the effect of stress factor (ethanol) on PHB-HV synthesis by this microorganism was investigated. The method obtained by optimization in Erlenmeyer flasks was applied to the synthesis of the PHB-HV copolymer in the bioreactor using fructose as a source of carbon, too. Furthermore, after enzymatic hydrolysis, a sugar extract from grape pomace was obtained as a source of carbon for the synthesis of PHB-HV. The fermentation in Erlenmeyer flasks and the bioreactor using an extract of grape pomace was carried out. Using this alternative carbon source 3.51 g/l PHB-HV copolymer was produced in Erlenmeyer flask, 5.06 g/l in bioreactor respectively. In the first case, the proportion of 3-hydroxyvalerate in the copolymer was 23.78 mol. % and in the second one, 9.39 mol. %.
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Utilization of Heat in Biodegradation Processes as Electricity Savings Potential
Kuběna, Michael ; Šejvl, Radovan (referee) ; Baxant, Petr (advisor)
The present thesis deals with a non-traditional use of biomass–in particular the use of heat generated by the biodegradation processes, involving the degradation of organic substances. The theoretical part of the thesis discusses common uses of biomass in general first, later focusing on the description of biodegradation processes. Various types of bioreactors, in which biodegradation processes take place, are also briefly examined. Moreover, modern systems using this type of heating are described. The practical part focuses on the construction of a bioreactor with the system of heat dissipation. The bioreactor was monitored with temperature sensors to survey the ongoing processes inside the bioreactor and to determine the appropriate time to abstract the heat.
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Improvement of the Thermal Circuit of the Bioreactor and Its Verification
Lapčík, David ; Radil, Lukáš (referee) ; Baxant, Petr (advisor)
The main idea of this bachelor thesis is a research of existing bioreactor solutions related to their practical implementation with different design, biomass composition, aeration modifications and heat exchange to recover heat from the process of aerobic composting. The conclusion of this work will be evaluation of the results of temperature measurements on functional prototypes depending on their properties and calculations of theoretical heat balance including their comparison.
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Use of algae for production of biomass and bioproducts
Slonek, Jaroslav ; Máša, Vítězslav (referee) ; Brummer, Vladimír (advisor)
Submitted bachelor thesis is focused on description of use of algae for biomass and bioproducts production. The first part of the thesis is devoted to the taxonomic classification of algae and a basic summary of the characteristics of the different algal groups. The next part is aimed at bioproducts, which are obtained by algae cultivation and possibilities of further processing for energy purposes are also described. As for the cultivation, the emphasis is on modern methods in this area, i.e. on the possibility of using waste products in the culture process. In the next part, technological parameters of cultivation are discussed, for instance effects of technological parameters on growth and composition of biomass and production of desired products. The next chapter summarizes types of used culture bioreactors in which the growth of biomass occurs in a controlled environment. The information obtained and collected in the thesis is further discussed and summarized in the conclusion.
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Control of algal bioreactors
Rek, David ; Naď, Martin (referee) ; Máša, Vítězslav (advisor)
The bachelor’s thesis discusses the matter of cultivation of microalgae in an artificially altered environment – bioreactor. The aim of the thesis is to determine and present the factors influencing the growth of microalgae and to find means of automated regulation of such factors. Nowadays, the majority of bioreactors are laboratory ones and are mostly being operated manually. The recent increase in demand for this technology results in many pilot-plant tests with a wide variety of microalgae. Tests such as these will be required to be automated to serve properly in future research. The thesis is based on professional literature and articles. The first part is to familiarize the reader with the wide number of potential applications of microalgae technology in various fields, such as the food industry, water treatment or separation of CO2 from ambient air or waste gas. The next segment presents the factors influencing the growth of microalgae and lastly the system of required equipment and sensors for automated operation is described. The bachelor’s thesis summarizes the important information necessary for the construction and unattended operation of microalgae bioreactor with respect to maximalization of productivity.
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Design and Implementation of Modular Bioreactor with Use of Wasted Heat
Peterka, Michal ; Bajko, Jaroslav (referee) ; Baxant, Petr (advisor)
The aim of the thesis is to extend the existing project of further use of waste heat from biodegradation processes and to improve bioreactor design. The first part summarizes the theoretical knowledge of the use of biomass and waste resources. The practical part is initially focused on the development of the bioreactor structure, the following part deals with the use of heat pipes for heat dissipation and the last chapter is about heating the fermenter and collecting the generated gas. Designed construction of the new bioreactor proved to have more advantages than the previous type. Heat pipes have a great potential for heat dissipation from the bioreactor, next steps should lead to a system of interconnected heatpipes and controlled heat dissipation. Biogas consumption initially seemed like a good idea, but the processes within the fermenter are more complex than expected. After a short time, the processes inside the fermenter have stopped, therefore this path of research will require further exploration.
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Combined heat and biogas production using a bioreactor
Novák, David ; Radil, Lukáš (referee) ; Baxant, Petr (advisor)
This diploma thesis deals with the bioreactor system and its use for the production of heat and biogas. The bioreactor uses the composting and metanogation process of fermentation that humanity has known for hundreds of years, but the combination of these processes is a relatively unexplored area. The theoretical part of the thesis analyzes the existing possibilities of utilization of the heat generated in the compost, and also describes the used technology of small biogas stations and other small systems for biogas production. It follows the practical part of the work, when it was the task to design a bioreactor working at low temperatures during the winter. Part of the solution is the initial design and testing of the basic test structure of the bioreactor, followed by the implementation of a more advanced and more complex system, including a control and measuring center realized by a microcontroller.
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Methods and technologies for carbon dioxide capture in industrial plants
Rek, David ; Máša, Vítězslav (referee) ; Sukačová, Kateřina (advisor)
The rising level of carbon dioxide in the atmosphere has negative effects on life on our planet. Humanity is now dealing with the issue through multinational organizations which attempt to motivate the current industry to develop innovative solutions to increase the energy-efficiency while lowering the amount of produced emissions. The most affected are energy-intensive sectors of the industry, such as the ceramics industry. This diploma thesis is based on a thorough research conducted on scientific literature, mainly scientific articles. The theoretical part is to familiarize one with the issue of rising levels of carbon dioxide. Next, methods to capture, store and use the gas are presented. Furthermore, the thesis focuses on one such method – microalgal bioreactors. The practical past weighs the usability of microalgal bioreactors for the purpose of carbon dioxide emissions capture in a production company LASSELSBERGER, s.r.o. belonging to the ceramic industry. Tubular bioreactor with a volume of 2000 m3 would process 3,75 % of CO2 produced by the core production machine – spray drier, during this process 367,92 tons of microalgal biomass would be produced annually.
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Bioreactor monitoring and control for optimal heat gain
Hujňák, Jan ; Bajko, Jaroslav (referee) ; Baxant, Petr (advisor)
This bachelor thesis deals with thermal energy generation in biodegradation processes, monitoring and control of these processes. In the theoretical part, it gives a brief overview of biodegradation processes, then focuses only on processes in which waste heat is produced. Mainly it focuses on the composting process, its stage, the ideal composition of the composting material, the composting methods, the control quantities and the metering devices. The practical part focuses on the improvement of the original bioreactor and the subsequent realization of the new bioreactor. The bioreactor is subsequently monitored using temperature sensors that describe the ongoing processes inside the compost using measured temperatures. The aim of the bachelor thesis is to connect the bioreactor with yurt, to realize thermal circulation and to control this circulation through the AMiNi system in order to achieve optimal heat recovery without negative effects on the course of biodegradation processes inside the bioreactor.
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