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Financing of Business activities
Ziková, Anna ; Havíř, David (referee) ; Heralecký, Tomáš (advisor)
The bachelor thesis deals with setting up a DIY e-shop and focuses on the means of its financing. The thesis is divided into two parts, a theoretical one and practical one. The theoretical part includes the basic terms such as an entrepreneur, business plan and the sources of finance. The practical part consists of analysis of current state, which focuses on SWOT, SLEPTE and Porter analysis, and suggestion which focuses on business plan and the possibilities of source of finance.
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Environmental Protection Legislation and The Possibility of Using Waste as a Secondary Raw Material With a Focus on the Recycling of PET Bottles
Hejl, Martin ; Pavláková Dočekalová, Marie (referee) ; Kocmanová, Alena (advisor)
The aim of this bachelor's thesis is to analyze the recycling of plastics and the analysis of the recycling process of PET bottles in the company PETKA CZ, a.s. In the last analysis of the work influencing the ways to obtain input material for the production of recycling from PET bottles, management of plastic waste, proposals for improving the production of this company and at the same time the possibilities of reducing waste in the production of recycling. Furthermore, this work describes the legislative regulation of environmental protection, general principles of recycling, how to recycle the company PETKA CZ, a.s. It currently determines and at the same time how we could recycle this to use in the future.
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Negative impacts of renewable resources on environment
Kopeček, Marek ; Chýlek, Radomír (referee) ; Sitek, Tomáš (advisor)
Current society understands the need to protect the environment. Renewable energy resources are one of the major topics of environmental protection. Their benefits are reducing greenhouse gas emissions and reducing dependence on fossil fuels. The production process, operation, recycling, and possible accidents of renewable energy resources are investigated in each chapter. Attention was paid mainly to the most used renewable sources. Finally, the negative impacts are evaluated, and it is defined which renewable energy resources could be classified as ecological.
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Use of recycled building materials to urban pavement constructions
Průdková, Hana ; Hýzl, Petr (referee) ; Stehlík, Dušan (advisor)
This bachelor thesis describes the possibilities of construction and demolition waste management. It examines the issue of allocation and management of this waste and evaluates possibilities of their further use. It deals with production and use of recycled materials in construction of urban roads and economic advantage of recycled materials in comparison to natural aggregates. This work also discusses the issue of aerated concrete, as a modern building material, that will soon appear in construction and demolition waste to a greater extent. The practical part examines properties of mixed recyclates with a certain amount of brick and aerated concrete particles by testing the bulk density of grains and water absorption, freezing and thawing resistance and crushing resistance.
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Study of durability of concrete with recycled concrete and brick
Voráč, Jiří ; Hela,, Vlastimil (referee) ; Hela, Rudolf (advisor)
This bachelor thesis deals with issues of recycled concrete. The theoretical part describes the process of recycling the construction and demolition waste and describes requirements for recycled aggregate and recycled concrete in Czech republic and some of the member states of EU. The experimental part is focused on design of concrete with a substitution of coarse aggregate with a recycled concrete and brick aggregate.
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The possibility of using recycled concrete for the production of structural concrete
Pijáčková, Erika ; Křížová, Klára (referee) ; Hela, Rudolf (advisor)
The bachelor's thesis deals with the topic of recycled concrete aggregate and its use in the field of structural concrete. The aim of the work was to describe the possibility of complete or partial replacement of natural aggregates with recycled concrete aggregates for concretes of strength classes C16/20 to C30/37. The theoretical part is composed of findings from both domestic and foreign research and legislation, which were used to evaluate the possibility of more frequent use of recycled concrete aggregates in civil engineering in the Czech Republic. The experimental part consists of the design of concrete recipes with natural and concrete recycled aggregates and their economic evaluation.
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Filament recycler for FDM 3D printers
Neuwirth, Karel ; Bayer, Robert (referee) ; Jaššo, Kamil (advisor)
The first part of the project is focused on various types of 3D printing technology, especially FDM technology, where is possibility of recycling printed material. Next is a description of the most used materials for printing by FMD technology and a description of the production of filament using screw extruders. Several devices were selected for recycling and production of filament from FDM printing, for which their technological procedure in recycling is described. Subsequently, the work deals with the design of a device for melting plastic using a screw extruding device, including the possibility of measuring and regulating the output. In the last part, according to the design, the device is assembled and tested.
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The influence of environmental conditions of the recycling of solar modules
Langer, Filip ; Vaněk, Jiří (referee) ; Jandová, Kristýna (advisor)
This thesis is focused on experiments, goal of which is to separate protective glass apart from thin layer solar panel. This could lead to less expensive and more efficient recycling. We try to achieve the separation of the glass by thawing ethylene vinyl acetate layer, which serves as insulant and bonding material. Experiments are concluded in high temperature dryer and high temperature vacuum oven on samples of thin layer solar panel, which is for the purposes of experiments cut into same pieces by water jet cutting machine. The initiatory experiments in dryer and oven are to determine value of ethylene vinyl acetate thaw point in tested samples of panel. The thaw point is determined to be 340 °C. When exposed to this temperature, the ethylene vinyl acetate thaws enough for glass to be able to be extracted with minimal physical strength. The process is accompanied by fire destruction of tedlar layer and creation of exhaust gases. Following experiments in vacuum and nitrogen environment are to test their influence on thawing process. Exposing sample to temperature of 340 °C in vacuum led to no new results. Exposing sample to temperature of 340 °C in nitrogen environment prevented fire and achieved same level of thawing of ethylene vinyl acetate while creating less exhaust gases. Even though the fire was prevented, tedlar layer was still destroyed by the high temperature. Furthermore, particles of evaporated ethylene vinyl acetate condensed on surface of module in form of dust. Following experiments studied absorption of panel and influence of accessible solvents on thawing process. It was determined that panel is able to absorb approximately 2 % of acetone, 0,4 % of isopropyl alcohol and 0,11 % of distilled water in its own weight. Experiments with modules soaked in these solvents proved no new results in thawing process. By observing samples of ethylene vinyl acetate taken from module, thawed out of module after experiment in vacuum oven and dust condensed on surface of module after experiment in nitrogen environment, it was proven that the condensed dust is indeed ethylene vinyl acetate.
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Application of renewable and recyclable raw materials for preparation of new polymers
Horák, Pavel
This thesis deals with optimalization of flexible polyurethane foam recycling with using of natural polyols based on rape seed oil and fish oil and it explores applications of depolymerized polyol product by formulations of new polyurethane materials. The experiments of depolymerisation showed that both tested natural oil (rape seed oil and fish oil) can be used as effective reagents for polyurethane recycling. Reaction conditions of depolymerisation were optimised with model flexible polyurethane foam and applied on waste foam from real conditions. Gain of depolymerisation is one-faze low viscosity (to 1500 mPa.s) liquid polyol products with content of hydroxyl groups ca 3 mmol/g. These polyols can be used for polymerisation of new materials. First application of recycled polyols was formulation of polyurethane foam systems. Through optimising of formula was prepared low-density semirigid foam containing 100 percentage of recycled polyol. Properties of these foams correspond to commercial foams. To prepare of homogenous cast polyurethane system based on recycled polyols it was necessary to add proper solvent, therefor extent of application has been lowered. On that account the systems were tested for study of polyaddition reaction and for following properties of the material. In these tests, the reactivity...
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