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The study of recycling non-ferrous metals in the EU and the Czech Republic
Rákosník, Vítězslav ; Benešová, Libuše (advisor) ; Tonika, Jaroslav (referee)
Overall, recycling entails both advantages and disadvantages. The major advantage is saving large amounts of energy in recycling compared to primary raw material, which is another big plus for recycling non-ferrous metals - save primary raw material. The Czech Republic and many other countries are largely dependent on imports of certain raw materials (aluminum, lead, copper, etc.) or just on mentioned recycling. Nowadays, increase in the number of electrical devices (computers, mobile telephones, tablets, etc.), is recycling of scrap metal very important, because in each device occurs a certain amount of non- ferrous metals, noble metals, which can be used again. In this work will be described commonly used non-ferrous metals (properties, inventories, recovery and recycling). Theses also deal with e-waste and its management. Key words: non-ferrous metals, recycling, utilization
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Can We Consider Recycling of Wastes as a Shift in the Environmental Consciousness?
Gregor, Martin ; Lapka, Miloslav (advisor) ; Duží, Barbora (referee)
This bachelor's thesis analyses the phenomenon of recycling waste from the culturological perspective, but not from the ecological, technological or logistical point of view. Pivotal element of the whole work is a conception of culture. Culture in this thesis is understands and uses as abiotic system of adaption of our society to the environment. The main topic of the whole study is the attitude, and position of the level of environmental consciousness in our society. This study - with a help of multidisciplinary analysis - looks for an answer whether rise and popularization of contemporary waste sorting can be considered as an indicator of cultural change, respectively to move the society towards pro- environmental consciousness. A key part of the thesis is a case study evaluating the influence social and demographic impacts on the level and manifestations of environmental consciousness. This study is based on a comparison of the level of mentioned kind of consciousness between the city inhabitants and village locations. Key words: Wastes, Recycling, Environment, Environmental Consciousness, Environmental society, Sustainable development.
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Importance of Plastics and the Impacts of Plastic Waste: The Sociological View on the Possibilities of Solutions of Plastic Waste Accumulated in the Oceans
Heuer, Dan ; Zvěřinová, Iva (advisor) ; Kyselá, Eva (referee)
Importance of Plastics and the Impacts of Plastic Waste: The Sociological View on the Possibilities of Solutions of Plastic Waste Accumulated in the Oceans Dan Heuer Abstract: The Paper deals with a question of plastic waste in the oceans. Especially, it asks about particular solutions concerning plastic waste and its effectiveness. Firstly, it is identified how human understands plastic as a material. Subsequently, negative impacts on the environment caused by plastic waste are summarized. Especially, little pieces of plastic are significant problem. Animals often mistake it for food so they can transfer harmful substances to the food chain. The main part of the work is an analysis of particular solutions. It shows that the prevention and development of bio-plastics has greater potential to solve this problem than recycling and other methods. Although there is needed to know that all of the solutions work together in cooperation so they are dependent on each other. Author presents the model of Competing functions of the environment. This system demonstrates that even though the resolving of the problem is not achievable in short period, it would be very positive that humankind is trying to fight against the stream of plastic waste to ocean. Therefore establish the balance among utility possibilities which...
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Chemical composition of photovoltaic panels
Koudelová, Marta ; Šebek, Ondřej (advisor) ; Tejnecký, Václav (referee)
The bachelor's thesis is focused on the issue of photovoltaic cells and panels. The literature search was formed from selected available literature with the purpose to characterize different types of the crystalline silicon photovoltaic cells and thin-films photovoltaic cells and describe the application of photovoltaic cells in the world and in the Czech Republic. In the next part of this thesis is a summary of current knowledge about recycling of photovoltaic cells and other utilization of layers and their possible impact on the environment. The practical part of the thesis deals with selected samples of PV panels. A few samples of photovoltaic panels were taken for chemical analyses. Chemical analyses are performed of the five samples of the photovoltaic panels. The results of chemical analyses were compared with acquired data from the literature. The results of the multielementary analysis of selected samples was that the photovoltaic panels contain a risk elements (e. g. As, Cd, Sb, Mo). The PV panels also contain economics utilizable elements (Ag). Content of silicon is up to 78,18 % SiO2. Key words Photovoltaic panel, photovoltaic cell, chemical analysis, risk elements, recycling
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Paper, plastics and metals recycling
Kaireshev, Ruslan ; Benešová, Libuše (advisor) ; Doležalová, Markéta (referee)
The latest trends in the field of waste management and recycling show an annual increase in the proportion of municipal waste, especially the municipal solid waste folder, in total waste production in the Czech Republic and in the world. The constant pressure specified by latest amends in the waste and packaging legislation, regulation by the European Union directives on reducing the amount of waste deposited in landfills, pushing the waste management system to increase the rate of recycling of waste, especially of individual commodities such as paper, plastic, metal and cartons. Recycling has its advantages and disadvantages, the current challenge for expert public is to find ways of waste management in the future. Currently, expert public is interested not only with solution of recycling problems itself, but with possibilities of alternative forms of waste recovery. In 2010, thanks to the recycling of paper, plastics, glass and metals saved 23.3 million MJ of energy that may not be produced, which represents one percent of the total energy consumption of the Czech Republic. Recycling reduced the overall green gas emissions by less than one percent, corresponding to 0.96 million tonnes of CO2 equivalent (EKO-KOM). Key words : recycling, paper, plastic, metals
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Possibilities of recycling mobile phones.
Slováková, Jana ; Benešová, Libuše (advisor) ; Polák, Miloš (referee)
Mobile phones are the most used electronic equipment on the globe. Their recycling rate is low because the collection system of end-of-life mobile phones is ineffective. This thesis remains mobile phones collection systems, their composition and content of usable components. The next section describes dealing with mobile phones in the Czech Republic, and the practical part describes the results of research conducted under the ASEKOL, s.r.o. The total weight of the samples was 20 830.27 kg. Total weight in group 3, where mobile phones are, was 13 740.79 kg (5 730 pieces). In comparison with year 2009 the group 3 increased by 155.14 kg, while there was a decline in the number of items in the group - there were from 6,092 pieces to 5,730 pieces.
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The impact of metal powder recycling on the porosity of parts produced by Selective Laser Melting
Sůkal, Jan ; Hudák, Radovan (referee) ; Paloušek, David (advisor)
Diploma thesis deals with the influence of recycling of powder steel 1.2709 on porosity of parts processed by SLM technology. Theoretical part of this thesis gives an overview of the influence of selected process parameters of this additive technology on the porosity of manufactured parts. The presence of pores in the material is the main cause of worse mechanical properties compared to conventionally manufactured materials. Since the advantage of this technology is the possibility of wasteless production, one of the possible causes of pore formation and degradation of properties of the powder material is due to standard recycling by means of sieving to remove the contaminants generated during the construction. This paper compares the porosity of parts produced by two different machines, analyzes the possible consequences of sieving on powder properties, establishes recommendations for setting the recycling process, and compares the degree of influence of process parameters on porosity.
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Effective proposal and operation of sorting line as an element in waste management
Guštara, Dominik ; Kropáč, Jiří (referee) ; Gregor, Jiří (advisor)
The hereby presented master’s thesis deals with municipal solid waste separation. The introductory chapters describe current state of handling of selected recyclables and the technologies of their collection. The following chapter is a description of a waste sorting line technology, since this facility’s function is to upgrade the recyclables to secondary materials. The first step of practical part of this thesis was creation of a technical-economic model of the sorting line designed to process plastic and paper waste, therefore the following chapter is dedicated to its description and presentation. Subsequently, the outputs of the model are evaluated for three settings of its input variables, which represent the three imagined scenarios of the modeled sorting line’s operation. Sensitivity analyses focused on selected input variables of this model were also performed. A separate chapter is dedicated to changes in the model outputs in the case of including the waste transportation prices to the selected scenario. At the end of the thesis, the influence of increased material separation of plastic waste on the lower heating value of residual mixed municipal solid waste is evaluated.
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Study of Free-Field Photovoltaic Plants in South Moravia
Bařinka, David ; Jandová, Kristýna (referee) ; Szendiuch, Ivan (advisor)
This dissertation is the study about the future of solar power stations in the Czech Republic, describing the history, composition, principle of solar power stations and types of defects. Is primarily focuses on the future and recycling of solar power stations and solar panels. The conclusion of this disertation describes and evaluates own survey which is oriented on operators of the solar power stations.
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