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Possibilities of using the secondary product from the production of titanium white as a setting retarder in Portland cements
Smirnov, Pavel ; Švec, Jiří (referee) ; Opravil, Tomáš (advisor)
This thesis is concerned with finding the possibilities of processing and application of the secondary product from the production of titanium white. The raw product, commercially known as Prestab, is currently being landfilled due to its properties, chemical composition and high moisture content. Previous research has shown that the material could have potential for use in the construction industry. The effectiveness of the work is also supported by the trends of today, where environmental requirements are becoming more stringent and more costly to implement. The use of secondary raw materials avoids the production of additional CO2 and also reduces the environmental burden. The secondary product, which is chemically a polluted chemosulfur, is investigated in this work as a setting regulator for blended Portland cements. In solving the problem, a suitable laboratory processing method for Prestab was found and subsequently a blend formulation for the preparation of admixture in Portland cements was also proposed. Three cement samples were prepared using the obtained admixtures. The samples were subsequently tested for their properties according to ČSN EN 196 and the results were compared with the CEM II class cement already in use in practice.
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Grape vine
Lubovská, Karolína ; Písaříková, Jana (referee) ; Korbička, Pavel (advisor)
The work Grape Vine explores the theme of the South Moravian wine landscape and the elements that are associated with it and most characteristic of it. The work highlights the practices by which this landscape is altered and cultivated for human use, in this case for the cultivation of grapes and the wine production. It focuses on the approach to the landscape and the specific ways in which different parts of it are approached through cultivation, selection and growth control in order to achieve the highest yields using the practices determined by the tradition of agriculture in this specific area.
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Methods of energy treatment of municipal waste
Štork, Martin ; Köbölová, Klaudia (referee) ; Linda, Jakub (advisor)
The bachelor's thesis deals with the topic of how to deal with waste in order to obtain as much energy as possible from it. That's why we are dealing with restrictions on landfilling. In the theoretical part of the thesis, we will find the types of waste and their characteristics, as well as the ways in which waste can be worked. In the practical part of the thesis, I try to show how waste could be worked in the future, ideally for a large yield of energy and with minimal air pollution during waste processing. This results in a complete restriction of landfilling.
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Optimization of the Reverse Waste Logistics System in the Selected Enterprise
Davydova, Anna ; Valenta, Tomáš (referee) ; Milichovský, František (advisor)
The bachelor thesis focuses on the research of reverse logistics of waste in the banking company Raiffeisenbank a. s. The thesis consists of three parts. The first part covers theoretical background on the basis of which in the second part, the research is carried out using the analysis of the internal and external environment. The third part contains proposals for improving the waste recycling system at the Raiffeisenbank branch in Olympia and an evaluation of achieved results.
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Design of a new production line
Hejl, Martin ; Jurová, Marie (referee) ; Juřica, Pavel (advisor)
This diploma thesis deals with the project of implementing a production line in a selected company dealing with the recycling of plastic waste and the production of rPET flakes as a secondary raw material for the production of plastic products. First, it deals with the description of the current state and the production process in the company, including the layout of the equipment, and then defines the requirements for the project by the management of the company and individual shareholders of the company. Defining the requirements for the project and at the same time the method of obtaining key information took place on the basis of in-depth interviews with the interested parties of this project, while a pilot design of the layout of the machinery was created, including a description of the technology and a flowchart of the required production process. The main content of the design part is the creation of a proposal for a possible implementation of the production line using a network diagram using the PERT method, which indicates that the duration of the project was calculated to be 106.6 days. Together with the network diagram of the project, an analysis and proposals for managing the risks of this project were prepared. At the end of the draft chapter, a financial analysis of the project's payback period was carried out, as the condition of a payback period of 3-5 years must be met in order for the project to be approved by the shareholders, which this project fulfilled in all three expected progress scenarios.
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Converting PET bottles into printing filament
TOŠER, Martin
This thesis deals with the development of a machine for converting PET bottles into printing filament. The theoretical aspect of the thesis is mainly focused on the history of 3D printing, comparison of its methods and sustainability. An important part of the thesis is also a chapter on the motivation to create the machine and a research of available solutions. Based on the choice of suitable machine design, the machine was built and tested. Instructions for its construction were created and uploaded to the Printables portal.
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Evaluation of Polymer Separation System Purifier N 1024 device efficiency
Duliková, Michaela ; Charvátová,, Michaela (referee) ; Čáslavský, Josef (advisor)
In this Diploma Thesis the recycling of the PET bottles in the company PETKA CZ, a.s. is under focus. Thesis describes the Italian technology AMUT designed for physical recycling of the PET bottles. The primary goal is the quality of the final recycled product, PET flakes, particularly in the context of undesirable admixtures such as PVC, other polymers and impurities. Due to the deteriorating quality of the PET flakes the equipment Polymer Separation System Purifier N 1024 has been tested, which had significantly reduced admixtures in PET flakes. As it turned out, the current procedures for solving problems with the PET flakes quality are no longer sufficient.
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Use of R-material in asphalt mixtures with highly modified binder (HiMA)
Christ, Roman ; Dašek, Ondřej (referee) ; Hýzl, Petr (advisor)
The subject of this diploma thesis is paid attention to the influence of different dosing of R-material containing unmodified asphalt on the properties of asphalt concrete for abrasive layers (AC011 +) bonded with polymer highly modified asphalt (binder type HiMA). The properties of asphalt mixtures will be evaluated by means of the stiffness modulus test and the test of low-temperature properties by a uniaxial tensile test.
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Waste horizon
Ochotná, Barbora ; Rypl Žabčíková, Ada (referee) ; Kristek, Jan (advisor)
The city is a place of accumulation, production and reproduction of production resources and consumption of goods, but waste typically accumulates outside it. It falls out of our horizon physically and mentally. The waste we produce changes the landscape and transforms the processes on earth without most of us visiting the "places of transformation". The project works with the idea of redirecting the final phase of the production chain back to the place of consumption by producing elements of public space from municipal waste. The presentation of waste leads to an awareness of its amount and degree of consumption. At the same time, waste becomes something much more ambivalent, possibly useful or even beautiful.
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Risk Assessment of Textile Waste Management
Šindlerová, Vanesa ; Vymazal, Tomáš (referee) ; Hrabová, Kristýna (advisor)
This thesis deals with environmental risks arising from textile waste management. The introduction describes the context of textile problematics and maps the current situation of textile waste management. The main goal of this thesis is to determinate the environmental risks of low percentage of recycling. Recycling is one way of dealing with textile that mitigates the impact on the environment. For the evaluation of the causes and consequences of the researched problem are used Bow-tie analysis and Ishikawa’s diagram. The results of the work bring environmental risks resulting from the application of those selected methods. Part of the thesis is a questionnaire that evaluates the individual’s attitude to textiles. Results of the questionnaire reveals that not needed textiles are perceived as risk to the environment. At the same time, consumer behavior does not correspond with efforts to mitigate the identified impacts.
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