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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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TITANIUM - Technology coarse upper stage of construction
Ševčík, Jan ; Mesiarkin, Jan (referee) ; Henková, Svatava (advisor)
The subject of this thesis is the solution of reinforced concrete upper portion of gross building a particular proposal technological process for the realization of the supporting structure of the building. In the technological regulations will be prepared draft reports formwork, describes the individual work procedures and construction. The work also includes a proposal building equipment, machinery, develop a timetable, location, building relationships with the wider transport routes, quality requirements and ensuring safety and the proposed measure. Like other entry will be processed technological specification for masonry rough upper structure solved object.
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Sanitary technical installations and gas pipeline in the hotel
Ševčík, Jan ; Wierzbická, Helena (referee) ; Vaščáková, Alena (advisor)
Diploma thesis deals with design of sanitary and gas instalation in hotel building. It is hotel with four floors and basement. Theteoretical part is focused on grey water treatment systems and possibility of their use in the building. The Computational part and project includes design of sanitary and stormwater sewer, water supply system, gas installations a their service pipes to current utility lines.
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Technologies of reuse of wastewater in place of need
Podhrázský, Martin ; Ševčík, Jan (referee) ; Hlavínek, Petr (advisor)
Final thesis is focusing on possibilities hidden in the potential of wastewaters in sewers. The goal of this thesis is to present technologies and experiences with water reclamation and with heat recovery systems using wastewaters as a source of heat energy. The theoretical part is divided in two main topics. The first topic is focused on bringing important knowledge and experiences with designing and operating decentralized sewer mining systems, which are, due to less favourable environmental conditions, largely applicated and developed in countries such as Australia, California, etc. The second topic is focusing on heat recovery from sewage water and possibilities of heating and cooling buildings. A possibility of using heat energy from sewage for heating and cooling a swimming pool building located in Brno, Czech Republic was assessed in the last part of this thesis. As a source of wastewater was considered a sewer main located near the pool building. Payback periods and economical effectivity of investing into wastewater heat recovery system was compared with centralized heat supply system, which is a very common source of heat energy in Czech Republic.
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Suspensions of passenger and race cars
Ševčík, Jan ; Zháňal, Lubor (referee) ; Porteš, Petr (advisor)
Bachelor thesis focuses on comparing different types of axles between them with emphasis on changing the geometry during propružení.In student version of Autodesk Inventor Professional was created virtual models of axles and virtual test polygon. The output of the program are a series of images showing the axle during springing. Changes in geometry are quoted, described and analyzed. In conclusion there are compared to civil rights and race suspension.
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Study population of bacteria by image analysis methods
Ševčík, Jan ; Veselá, Mária (referee) ; Zmeškal, Oldřich (advisor)
This bachelor thesis is focused on monitoring and application of image analysis methods on Bacillus megaterium and Cupriavidus necator bacteria. The introduction describes a general knowledge about bacteria, microscopic and image analysis methods. At first it was necessary to prepare suitable microscopic specimens using Gram staining for the observation of a bacteria cell. Every picture of bacteria was taken using a CCD camera and a microscope. Box–Counting method was used to identify the optimal threshold value, corresponding to their fractal measure (or surface areas covered with bacteria) and fractal dimension (or entropy of their arrangement on the surface area). After thresholding, the images were further processed using the Mass–Radius method, which defines a distribution of bacteria relative to the centroid of a cluster.
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