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Measurement of selected physical properties of the waste water from biogas plant
Ondruška, Vojtěch ; Zejda, Vojtěch (referee) ; Vondra, Marek (advisor)
The aim of this Bachelor’s thesis is the experimental measurement of physical and chemical properties of the wastewater from biogas plants. Thesis concisely describes wastewater and its origin. The main part is dedicated to the design of experiments and to the detailed description of the measurement of selected properties with the available laboratory methods. Measured data are evaluated and compared to literature. The results of this thesis can be employed to further develop the equipment for thickening wastewater from biogas plants or to other scientific activity in the field of waste management in agriculture.
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Integration of a technology for digestate thickening in a biogas plant
Miklas, Václav ; Touš, Michal (referee) ; Vondra, Marek (advisor)
This diploma thesis is mainly focused on the digestate thickening in a biogas plant. First, overview of the biogas technology in the Czech Republic is presented. Furthermore, problems with waste heat utilization and processing of fermentation residues (digestate) are described in more detail. Based on the research, multi-stage flash (MSF) evaporation was chosen as the technology for the digestate thickening. The main part deals with the integration of the chosen technology into a biogas plant process. The programming language Python was used to simplify the given task. In the preliminary stage, a complex mathematical model of a biogas plant was created, focusing particularly on the mass and energy balances. Subsequently, a computational model of the MSF evaporator was programmed. A procedure for the integration was suggested using the sensitivity analyses. Additionally, the model of a biogas plant was extended with the MSF evaporator. The key outcome of the thesis is a technical-economic analysis in which the impact of digestate transport price and electricity feed-in tariff on payback period is investigated. The results suggest profitability of MSF evaporator for biogas plants without subsidized feed-in tariff. Contrastingly, installation of MSF evaporator in older biogas plants with subsidized feed-in tariff can be economically viable only in cases of significantly longer transport distances.
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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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Návrh opatření ke zvýšení efektivity BPS v Brance (ZD Čechtice) a hodnocení vlivu BPS na životní prostředí
KADLEČEK, Ondřej
This bachelor thesis focused on biogas plant technology. It describes biogas, its formation and its utilization. It discuses factors which influence efficiency of biogas plants along with suitability and preparation o the substrate used for biogas production. Furthermore it discuss digestate and assesses enviromental impact of a biogas plant. Within the conlusion is performance enhancement of a biogas plant in Chotýčany, description of biogas plant in Braňka Čechtice and a proposal for its performance enhacement.
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The development of consumtion of rewewable energy sources in the Czech republic after 2000
Mrůzková, Veronika ; Dvořák, Antonín (advisor) ; Hadrabová, Alena (referee)
This bachelor thesis focuses on the consumption of renewable energy sources in the Czech republic thesis is divided into three parts, first chapter is theoretical and the second and the third are practical. The theoretical part deals with these terms: renewable energy sources, working of each of chosen sources and the suitability of chosen source in the Czech republic. Second chapter covers specific terms such as extension of each chosen source in the Czech republic, granted subsidies for renewable energy sources and total costs of these subsidies. The reason of extention of renewable energy sources can be found in this chapter. Last chapter descibes technical and economical characteristics of chosen biogas plant. It also evaluates the investment by using different methods such as cash flow, NPV, IRR or payback period. This chapter contains sensitivity analysis too. This analysis shows how sensitive are the costs of biogas plant.
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Model optimizing of the biogas plant operation after testing operational phases
Raška, David ; Matějíček, Luboš (advisor) ; Frouz, Jan (referee)
Biogasplants are installations for converting of biomass to produce biogas, which is a valuable energy source if a proper management of ananaerobic process is kept. In the Czech Republic are mainly agricultural biogas plants. This workis focused on evaluation of data obtained from a specific biogas plant, which islocated in the town Úpice. This plant processes biodegradable waste. Data are evaluated qualitatively, also with use of cluster analysis using statistical program R as well as by a proposed linear regression models in Matlab software. Results were applied for suggestins of several measures for the management of biogas plant and for creation of non-linea rregression model, which can be further developed. . Keywords: Biogas, plant, anaerobic, fermentation, biodegradable, waste, data analysis, differential model
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MODEL OPTIMIZING OF THE BIOGAS PLANT OPERATION
Raška, David ; Matějíček, Luboš (advisor) ; Zíková, Naděžda (referee)
Biogas plants are installations for converting of biomass to produce biogas, which is a valuable energy source if a proper management of an anaerobic process is kept. In the Czech Republic are mainly agricultural biogas plant. This work is focused on evaluation of data obtained from a specific biogas plant, which is located in the town Úpice. This plant processes biodegradable waste. The aim of this study was to determine which waste processed are beneficial for the production of biogas. The Data were analyzed by statistical program R. The method used was cluster analysis. For comparsion of clusters was used ANOVA method (analysis of variance). The results of data analysis showed a positive effect on the production of biogas by waste from industrial processing of potatoes, grass and corn silage, rumen contents and dairy waste. Key words: Biogas, plant, anaerobic, fermentation, biodegradable, waste, data analysis
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The production of biofuels and regional development: case study Mohelnicko
Rozmanová, Jana ; Jančák, Vít (advisor) ; Hrabák, Jiří (referee)
The aim of thesis is to capture and analyze changes, which were caused by the construction of two biogas stations in the study area Mohelnicko. In the thesis is described process of anaerobic digestation, biogas basic elements and their development in the country. The next section of thesis analyze changes in maize area as the main raw material of agricultural biogas plants and collecting areas in the study area. The following is a survey among the inhabitants of the village Třeština, which investigates the impact on the lives of the community and regional development. The conclusion summarizes the results and their evaluation.
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Zvýšení efektivity zemědělské bioplynové stanice "Měčín" v okrese Klatovy
MACH, Stanislav
The thesis deals with growing methods of silage corn for subsequent use in a biogas plant in order to increase the efficiency of a biogas plant. There are compared three methods of growing this crop. As a main indicator comparing the different methods of cultivation was a net profit from 1 hectare yield and the profit from green mass in tons from 1 hectare. A classic growing technology was compared with two modern technologies that take into account anti erosion techniques.
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Fermentation remainder treatment in a biogas plant
Budín, Oto ; Touš, Michal (referee) ; Vondra, Marek (advisor)
This diploma thesis deals with dewatering technologies of fermentation residues from biogas plants and aims to design an integration of selected technology into the biogas plant. Fermentation residues (or digestate), which are a by-product of anaerobic biomass fermentation in biogas plants, contain a certain amount of nutrients and are usually used as agricultural fertilizers. However, the high-water content in digestate and the associated low nutrient concentration increase the cost of its storage and transport. Dewatering of fermented material could help reduce these costs. The main part of this work included the design of an integration of the selected dewatering technology into the biogas plant – its placement in a process, an addition of necessary appliances, the influence on material and energy flows. In this case, the fermentation residues are processed in two phases. First, a separation of the solid and the liquid fraction by a screw press. The second step is to thicken the liquid digestate by evaporation in a multistage evaporator. Evaluation of the design of a dewatering technology, including its impact on the economy of the biogas plant, is also part of the diploma thesis.
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