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The construction of the magnetic metal powder separator
Papaj, Lukáš ; Suchý, Jan (referee) ; Paloušek, David (advisor)
This thesis deals with the design of construction for recyclation metal powder, which is used in multi-material 3D printing with SLM technology. More specifically it is separation of mixed metal powders by magnetic separator, which is capable of separating two powders with the same distributions. Based on knowledge from industrial separators and successful experiment method of separating with magnetic drum was chosen, on which is equally driven metal powder from vibrating feeder. In executed experiment was discovered, that the method is appropriate for separating non-magnetic powder but for high quality separation of magnetic powder must be adjusted speed of feeding. Next was processed drawing documentation for this variant. By this documentation can be separator assembled and used in laboratory for separating metal powders.
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Experimental comparison of recycled and non-recycled filament of ABS plastic
Grygar, Filip ; Krčma, Martin (referee) ; Koutecký, Tomáš (advisor)
Plastic waste which arises from 3D print could be recycled. One of the most used materials is ABS with which this degree work deals. During recycling of ABS mechanical qualities rapidly deteriorate which is compensated by adding non-recycled ABS. This degree work dealt with a ratio of 25% of recycled to 75% of non-recycled material which is a ratio not have been tested so far, and most likely represents a boundary ratio when recycling still makes sense. Unfortunately, it was not possible to extrude from a recycled material a filament of high-quality enough which could be used for problem-free print. It was influenced by non-homogeneity of crushed components and the construction of an extruder. For improving the characteristics a more complex extruder would be needed, with a bigger screw diameter or with two screws, and also a cooling system with more zones. Professional grinders with screens would have to be used for improving homogeneity of the material. The melt flow index of the liquid alloy and the testing of the filament itself showed that this way is practicable and such a recycling is realistic.
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Municipal Waste Management and Analysis of Influencing Factors with respect to Municipal Solid Waste Generation
Kmeťková, Diana ; Cahlík, Tomáš (advisor) ; Kopečná, Vědunka (referee)
This thesis presents the topic of municipal waste management in the Czech Republic and describes the current trends within this area. We analyse the data on the generation and treatment of municipal solid waste in the Czech Republic and then we compare several waste indicators in the EU countries. The main goal of the thesis is to describe the relationship between municipal solid waste generation (MSW) and socio-economic factors. In order to identify the variables that might have a significant impact on the generation of MSW, we carry out a panel data regression using data from 28 EU countries over a time period from 1995 to 2017. We present four model specifications that were created based on the studied research articles. Our findings suggest that GDP and income have a significant positive impact on MSW generation, which is in accordance with the majority of research works. On the other hand, two other significant variables, population and density, are estimated to be negatively related to MSW production. Moreover, urbanization and unemployment rate result to be insignificant. 1
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Advanced Treatment Methods for Incineration Bottom Ash.
Šyc, Michal ; Baloch, T. ; Veselý, Václav ; Zuda, M.
Bottom ash is main solid residue from waste-to-energy. Recent development and trends change the approach to IBA, it is no longer regarded as unwanted waste from WtE plant but can be considered a valuable secondary source for several materials like ferrous and non-ferrous metals. Mineral residue after metal separation can be used in construction industry, e.g. as aggregates substitute for bound or unbound applications such as subbase layer for road construction. The paper summarizes results of recent activities for bottom ash utilization in WtE plant in Prague within last few years.
Fulltext: content.csg -  PDF
Plný tet: SKMBT_C22019040810070 - PDF
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Possibilities Of Recycling Of Li-Ion
Accumulators
Karmazínová, Kateřina
This paper is concerned with topic of lithium-ion batteries recycling. In this document the particular methods containing commercial used recycling processes or only laboratory used processes are discussed. Because rising amount of spent Li-ion accumulators is necessary find proper methods to recycle this type of accumulators. In practical part is described procedure and results performed recycling method.
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Use of FRP Composites as Reinforcing Material for Concrete
Kratochvílová, Denisa ; Prokeš,, Jan (referee) ; Bodnárová, Lenka (advisor)
Because FRP composites have high fiber strength and good durability, they are increasingly used for repairs, modernisation and reconstruction of concrete structures. In practice, however there is a risk of premature separation of FRP reinforcement from concrete. This can be avoided by appropriate selecting the fibers and the matrix and the appropriate shape of the reinforcement. The actual materials and consistency of FRP reinforcement with concrete are also covered by this diploma thesis.
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Harvesting and reuse of cellulose from wastewater
Kobzová, Kamila ; Úterský, Michal (referee) ; Hlavínek, Petr (advisor)
The goal of this diploma thesis is to highlight the properties of cellulose fibers obtained from waste water and the importance of recycling of raw materials. The main objective is then to further explore the possibilities of using cellulose fibers as a valuable product on the market. The practical part of the thesis is focused on specific research of cellulose properties and design of equipment for sewage treatment plant according to its size.
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