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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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The gas level measuring device with a capillary made by 3-D printing
Halva, Ondřej ; Búran, Martin (referee) ; Adámek, Martin (advisor)
This thesis is concerned with the experimental design, manufacture, and testing of a 3D printed prototype of a capillary. The aim is to introduce the reader to the issue of 3D printing related to the manufacture of capillaries and focus on chemiresist sensors. Furthermore, the features of microcontroller Atmel Atmega2560 and its applications in sensory technology will be described. In the second part of the thesis, the capillary for sample pre-processing with an output to a gas measuring device with an electrochemical sensor is designed and produced. For the control of the device, the Atmel Atmega 2560 microcontroller is to be used and the device must enable data transfer to PC. The possible applications of the capillary are to be evaluated.
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Protection of residents in case of development of a major emergency associated with a leakage of dangerous chemical substance in the area of a town Klatovy
ŠILHAVÁ, Markéta
This bachelor thesis deals with the issue of protection of residents in case of development of a major emergency associated with a leakage of dangerous chemical substance in the area of a town Klatovy. The theoretical part of the bachelor thesis describes the basic concepts that relate to the issue. There are also characterized by hazardous chemicals is incorporated herein their classification, characteristics or transport and marking. One theoretical chapter is devoted to the chemical ammonia, which is in the city is relatively widely used. The practical part shows the risks that threaten the city of Klatovy. The second part shows the results of a questionnaire survey that was conducted. The questionnaire contained 20 questions and was directed at residents of the town Klatovy. The total number of respondents who completed this questionnaire was 144. The aim of this text was to focus on the issue of leakage of dangerous chemicals substance in the area of a town Klatovy and evaluate information to citizens in case of emergencies associated with toxic chemicals. As part of the bachelor's thesis, one research question was asked: "Do the residents of the town of Klatovy have information on how to behave in the event of a leak of a dangerous chemical substance?". The set goal was fulfilled and the research question was answered. The benefit of this bachelor thesis is to obtain a summary of knowladge of residents of the town of Klatovy about how they behave and how they would proceed in an extraordinary event associated with toxic chemicals. The bachelor thesis can serve as a study material.
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Vyhodnocení emisí amoniaku z vybraného chovu prasat
BOČEK, Jan
The purpose of this final work is to evaluate the average annual emission of ammonia ballast gas from a selected pig farm in Hejná of Horažďovice in the Pilsen region. Instruments from the BAT center of the University of South Bohemia in České Budějovice were used for the measurements. This problem around the ammonia (NH3) ballast gas is further compared with the European Union directive and also evaluated according to the given statistical methods. In order to improve relations between agriculture and the environment, it is above all necessary to reduce emissions of all stress gases (NH3, CO2, N2O, CH4), but especially ammonia. Due to the increasing use of intensive agriculture, ammonia affects not only the environment but also the creation of the landscape, where it affects important landscape elements such as soil, air and water. Agriculture is considered to be the largest producer of ammonia up to 90 % worldwide. The use of the latest products for reducing the concentration of ammonia in the stable environment, in the processing of manure and slurry and protective measures when establishing manure and pits is a suitable method to prevent large-scale ammonia leakage into the air. The final work also has in its content a literature search, which mentions pig breeding in general, statistics and the economics of pig breeding.
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Vyhodnocení emisí amoniaku z chovu drůbeže ve vybraném zemědělském podniku
HUCEK, Jiří
This diploma thesis deals with pollutants that escape into the air during intensive breeding of broiler chickens. The biggest polluter is ammonia gas, which mainly results in the creation of the greenhouse effect and thus contributes to global warming. Many scientists are working on ways to reduce this unwanted gas, and are therefore developing modern stables technologies for all types of livestock on intensive farms. The final work evaluates the production of emissions from broiler farming. In particular, the evaluation of the annual ammonia emissions and the reduction of the production of this gas in the selected agricultural holding. The measurement was performed at the private agricultural company ZEFA Nová Pec, spol. s r. o. in the broiler chicken farm, located near Strunkovice nad Blanicí.
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Návrh 3D modelu reálného ustájení drůbeže pro potřeby počítačových simulací
MÁTL, David
This diploma thesis focuses on the creation of a 3D model of real poultry housing, which will be used for the needs of computer simulations. The dimensions needed for the elaboration of the thesis, were measured in a real hall for poultry breeding. The model is created in free student version of computer 3D modeling program SolidWorks. In the research part of this thesis are introduced ammonia limit values and systems for their reduction in poultry housing. The next section describes Revolution 4.0 and how it relates to poultry housing. The following part deals with clever technologies used in agriculture and their connection with poultry farming. The practical part deals with the workflow of creating and building a model.
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Zhodnocení zásad "Správné zemědělské praxe" ve vybraném provozu s chovem skotu
ROUHA, Pavel
The thesis deals with the topic of environmental pollution, especially by greenhouse and stress gases emitting in agricultural livestock production. Furthermore, we are seeking measures to reduce this pollution. The work itself is focused on measuring, evaluating and subsequent determining of the concentration of gas emissions. These are ammonia, nitrous oxide, carbon dioxide and methane produced in a selected dairy farm. Measurements for this thesis took place on the farm of Mr František Rouha in Velešín, in a stable where dairy cattle are housed in tie stalls. Devices from the BAT centre of the University of South Bohemia in České Budějovice, which are specially designed for this purpose, were used for these measurements.
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Stanovení koncentrace pachových látek v intenzivním chovu drůbeže na hluboké podestýlce
HRUŠKA, Jiří
The production of emissions of odorous substances, which are mainly produced in the livestock breeding, is growing with the increasing intensification of agricultural production. This bachelor thesis is focused on monitoring of odor emissions arising from intensive poultry farming on deep litter Measurements were carried out in the broiler fattening hall located in the company called Farma u lesa in Sudoměřice u Bechyně. Monitored emissions were evaluated in 2019. The samples were evaluated by the dynamic olfaktometry, which is, according to the standard ČSN EN 13 725, the reference method for determing the evaluation of emissions of odorous substances from livestock breeding. The resulting odor emission values ranged from 0,02 to 0,27 OUE . ks-1 . s-1. The results were compared with the recommended emission values given in the BREF reference document and it can be claim that the odor produced from this company is in low values.
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The climate in the classroom - physical parameters
MAŇÁSKOVÁ, Lenka
The purpose of this thesis is to evaluate a working environment in the classroom. The following parameters have been evaluated: noise, lighting, temperature, odours and gases in the air such as ammonia, nitrous oxide, carbon dioxide and methane. Measured values were compared with the legislation limits. Altogether 19 schools from South Bohemia Region were involved in the project.
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