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Preprocessing of sewage sludge for pyrolysis process
Ševčík, Jan ; Rusník,, Igor (referee) ; Bodík,, Igor (referee) ; Hlavínek, Petr (advisor)
The concept of sludge management at the level of sludge treating technology of sewage treatment plants, as well as at national, continental or world level, requires fundamental improvement in the interest of sustainable development. Sewage sludge production is continuously increasing. Sewage sludge contains a number of pollutants but also a significant renewable resource for material transformation and / or energy recovery. Sewage sludge is composed of an inorganic mineral part and organic components. Its organic part is a source of energy and nutrients, but also contains harmful pollutants for exapmple heavy metals. However, there are technologies that offer the possibility of neutralizing pollutants while using other sludge components in terms of recycling energy, nutrients and other attractive sludge components. The mentioned technologies include mainly thermal methods of sewage sludge treatment and one of them is pyrolysis. Thessis focuses on sewage sludge prepartation for pyrolysis process, which includes mixing with additives and peletization of prepared mixture for purposes of agricultural or energetical utilisation. Technology for material transformation and energy utilization of sewage sludge, in particular the mentioned pyrolysis or torrefaction, require an insignificant degree of detailed research in order to expand it in the field of sludge management. Indeed, it is not only research that will enable direct correct use of this technology in practice. The results of such research are the basis for the drafting of the relevant legislation, which will subsequently enable the deployment of pyrolysis technologies in practice.
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Optimizing of electronic bussiness of firm GAME LAND s.r.o.
Smrž, Marek ; Ševčík, Jan (referee) ; Kříž, Jiří (advisor)
This bachelor´s thesis describes and evaluates electronic business of a medium size company which the sphere of business is information technology. Paper is divided into two parts and contains eleven pictures. First section describes the current state of electronic business regarding its content, functionality and graphic user interface. Second section contains improvement concepts for particular fields that will eventually help with general optimization of the e-business. Innovation concepts are strongly customer-oriented and they will improve the usability of web pages and contribute on gain enhancement.
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Design of Formula Student Front Axle Adjustable Stabilizer
Ševčík, Jan ; Hejtmánek, Petr (referee) ; Porteš, Petr (advisor)
Diploma thesis focuses to design anti roll-bar for Formula Student car Dragon II build in FME. This work follows the proposal anti roll-bar car Dragon I of Jan Krasula. Task of this work is analyses last design, introduce more effective method treatment, create own design with parameters which will be better then last design. An integral part design is prepare manufacture documentation which will be base for manufacture of this komponent
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Multifunctional building - Houbalova - construction technology project
Ševčík, Jan ; Čech, Václav (referee) ; Henková, Svatava (advisor)
The subject of this thesis is the solution of building technology project poly-functional complex with a focus on execution of construction. Gross building is designed reinforced concrete skeleton combined with masonry. Technology will be developed Code for reinforced concrete monolithic frame and masonry. On the techno-logical stage it will be processed inspection and test plan and the balance of the major sources for the implementation of reinforced concrete structures 1.NP. The thesis is a proposal for construction site, which is complemented by a social facilities and offices. For an overall view of the construction of a multifunctional complex is processed time and financial plan, which will be further elaborated for building construction B. Availability of supply is verified by the design of routes. Like other task will be processed proposal formwork system for con-struction 1.NP Building B.
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Bonded hybrid joints in the automotive industry
Ševčík, Jan ; Hanáčková, Pavla (referee) ; Kubíček, Jaroslav (advisor)
This diploma thesis deals with bonded hybrid joints which are used for connecting parts of modern coachwork. Firstly, the thesis describes in general the process of production of the whole coachwork, from cutting of the blanks to the surface treatment including the analysis of the used materials. Subsequently, the problem of joining body parts through adhesives, but also by welding, soldering or other methods is discussed. Another part of this thesis is dedicated to an experiment in which the qualities of bonded hybrid joints were determined. Different ways of realizing the joint have been made which differed in the size of the glued surface, in the welding methods and in the process of their creation. The produced joints were tested for their strength and quality.
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Energetic use of wastewater sludge and microwave pyrolysis products
Šimek, Radim ; Ševčík, Jan (referee) ; Hlavínek, Petr (advisor)
The diploma thesis is focused on the energy utilization of sewage sludge before and after microwave pyrolysis process. The first part of the thesis deals with sludge management, treatment of sludge and its subsequent use or disposal. In the second part of the thesis prepared and modified samples of sludge from WWTP 1 and WWTP 2 are subjected to microwave pyrolysis process. Subsequently, samples are taken for analyzes to determine the total organic carbon, the specific surface area, the heavy metal content and the calorific values. The resulting data was processed in Microsoft Office Excel and presented at work. At the end of the thesis two case studies are then proposed for a specific design of the conceptual location of microwave pyrolysis for the sludge drying process and the drying process of the sewage sludge in the direct combustion boiler room.
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Monolithic milling tools with PVD coatings and their use
Ševčík, Jan ; Sliwková, Petra (referee) ; Jaroš, Aleš (advisor)
The bachelor thesis deals with the monolithic milling tools carbide on the surface which is deposited by a thin layer of rating on. First of all, the thesis describes the method of milling, the basic division of milling operations and milling tools, power analysis tool load. Then, it is analyzed problems of cemented carbides, its production, properties and dividing into groups. After that it is described characteristic of coating methods, especially the PVD method, and its modifications. The last part is devoted to producer’s offers of coated monolithic mills. There are introduced few selected tools and described its characteristics, geometry and application suitability.
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