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Hydrodynamic mixing of water-ask mixture in vessel
Holub, Přemysl ; Franc, Zdeněk (referee) ; Habán, Vladimír (advisor)
Master´s thesis Hydrodynamic mixing of water-ash mixture in vessel is interested in describing fluid and solid particles flow in a vessel. The mixing was conducted in cylindrical vessel by a radial nozzle. The goal of the thesis is to describe flow field and places where the most of the particles are descending according to position, depth, flow rate and nozzle orientation in the vessel. An experiment was conducted in order to investigate and document 8 different positions and orientation of the nozzle. Significant changes in flow fields and mixing time were observed. A mathematical model of the vessel with the nozzle was created in Fluent program. Places with the lowest velocities according to the model were in good agreement with places where the most of the solid particles were descending.
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Operational and Technical Condition of Separation Equipment in Water Treatment Plants
Pešout, Jakub ; Roh, Robert (referee) ; Kučera, Tomáš (advisor)
The goal of this thesis was to determine the operational and technical parameters of the separation objects in water treatment. The first part is a theoretical and provides basic information on this issue. The second part contains the evaluation criteria created by the obtained information for individual objects and gained in practice by personal visits of selected treatment plants of water. In the last part we can find application of these criteria in water treatment in practice. There is also included the final evaluation of the researched condition.
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Water Treatment Plants and their Failure Modes
Baranová, Zuzana ; Anderle, Lukáš (referee) ; Kučera, Tomáš (advisor)
The aim of this thesis was to conduct a survey in selected water treatment plants to identify possible faults with which treatment providers may encounter. Within the thesis has been visited these treatments: ÚV Troubky, ÚV Hosov, ÚV Příkazy, ÚV Černovír. Further was performed evaluation of the collected information, specification and frequency disturbances occurring on those premises.
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Hydraulic optimization of horizontal sand catcher
Kulička, Rostislav ; Šálek,, Jan (referee) ; Kriška-Dunajský, Michal (advisor)
This work is focused on the development control system flow area in a standardized horizontal sand trap in the Czech Republic used the majority of constructed wetlands for the capture of solid mineral particles. The goal is the development and validation functions of the flow regulator, providing more uniform process of establishment of mineral particles, respectively. reduction of sedimentation of organic components. The actual design precedes the mathematical description through the HEC-RAS, the results are applied in the design of a laboratory model. Work processes theoretically the standardized sand traps, focuses on the comparison of the required residence time of wastewater in the sedimentation area of establishment with the sedimentation time of sand grain on the selected diameter of 0.8 mm. In laboratory conditions were carried out build sand trap model itself, as well as developed a regulatory element. After resolving structural measurements were taken and compared the results with the ideal state. For putting the controller into practice, when an application is planned at the constructed wetlands in Dražovice village, it will have to the most accurate setting of the regulator.
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Sedimentation of MR fluid at the start of new space lanucher
Berka, Pavel ; Strecker, Zbyněk (referee) ; Roupec, Jakub (advisor)
This bachelor thesis deals with sedimentation behavior of magnetorheological fluid exposed to acceleration 1-6 G. That simulates start of a space launcher. Main goal of this work is to bring new knowledge of MR fluids behavior. Experiment of accelera-ted sedimentation as well as the long term sedimentation is presented, including new method and measuring device developed to measure the sedimentation, in order to compare different commercial MR fluids. Results from this work will be used in development of the new semiactive dum-ping system for carrying load in ESA new space launcher.
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A method for the solution of non-spherical (fiber) particles deposition by means of the Fokker-Planck equation for ODF in a laminar flow
Kopečková, Barbora ; Knotek, Stanislav (referee) ; Jícha, Miroslav (advisor)
The Bachelor's thesis deals with a deposition efficiency for a fibers by various mechanisms of a deposition. It explains deposition efficiency by diffusion, by sedimentation and by impaction. The implementation of Peterlin's analytical solution for calculation of the ODF, which is used for individual efficiencies solution, is also mentioned. Afterwards, the thesis summarizes formulas for calculation of particular efficiencies derived for spherical particles and recomputation appropriate parameters for fibers. The purpose of the thesis is to create graphs, which illustrate deposition efficiencies dependence by various mechanisms on the aspect ratio of fibers. Another goal is the graphs creation, which shows juxtaposition for various breathing modes for given deposition mechanisms. The software MATLAB is used for the whole calculation process and graphs plotting.
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Residential Rainwater Harvesting
Šumichrastová, Mária ; Vendlová, Lucie (referee) ; Wierzbická, Helena (advisor)
The aim of this work is to approach the issue of the use of rainwater in building constructions. This water is widely used for routine activities in the home, which contributes to saving drinking water. At the beginning of my work I focused on what water actually is, and a brief description of each treatment on the basis of their quality. In the first part of about reasons for rainwater management and access to the use of water collection at home and abroad. The second part describes possibilities of application of rainwater in the home. Describes the concept of the need for water, which is essential for the design of the facility. The design of tank is explained in part 3, where I describe the factors affecting the amount of water collected. The following chapters are focusing on individual elements making up the system for the management of rainwater. Chapters are divided according to their function, namely: filter portion, accumulation and a section giving water to the "movement".
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Use of EIS method for determination of sedimentation in stady liquid
Hradilová, Iva ; Vachovec, Roman (referee) ; Špano, Miroslav (advisor)
Determination of interface between sediment and liquid belongs to common tasks in various fields of industry like sewage and/or water treatment. The aim of presented work is verification of suitability of electrical impedance spectrometry (EIS) method for determination of interface between soil and water. The suitability was verified on three samples of soil. The first one was a sand while other two were loam of different grain sizes. Introduction of both the EIS method and Z-meter III instrument used for measurements is presented in this work too. Within conclusions the suitability of the method and provability in determination of water-soil interface are discussed.
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Intestinal parasites in archeological material from medieval period
BRUZLOVÁ, Pavlína
The aim of this thesis was to search for and identify human and/or animal intestinal parasite eggs in archeological material from medieval period in Brno and Prague. Concentration methods - sedimentation and flotation were used for parasite identification. Polymerase chain reaction (PCR) was used for the detection of parasite DNA. The results were put into context with other data published in similar studies and research.
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Sedimentation of dilute suspension in intermediate region
Vlasák, Pavel ; Chára, Zdeněk
The present paper describes the results of experimental investigation of the continuous sedimentation of a dilute model of fine-grained suspension in the intermediate region of settlement. The effects of particle size (glass beads of average diameter 150–850 μm), concentration, and inclination of the vessel axis on particle fall velocity were evaluated. It was confirmed that the local relative particle-liquid velocity has a practically constant value across the vessel cross-section. The settling pattern is strongly affected even by a very gentle slope of the vessel axis, which causes an asymmetrical absolute velocity profile and significant increase of the local concentration and absolute fall velocity of particles near the upward-facing wall of the vessel.
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