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Comparison of aeration elements
Stříž, Michal ; Beňo, Zdeněk (referee) ; Pěček, Jan (advisor)
The content of the thesis is to compare the aeration elements used in the aeration tank for biological treatment of wastewater. In order to compare, the work contains description and explaination of: ? basic division of functions and some aeration systems, ? transfer of oxygen, ? the use of pure oxygen instead of air, ? placement of aeration elements into the activation tank. Since the aeration elements are plentiful, work is focused on the most widely used pneumatic and mechanical aeration systems.
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Biogas composition
Čekanová, Adéla ; Pěček, Jan (referee) ; Beňo, Zdeněk (advisor)
Content of the submitted bachelor thesis is a description of biogas chemical composition with following analysis of each unit, especially majority units, with use of different gas analysis methods. Main emphasis is set on biogas units which have undesirable effects while using it as energy source and on possibilities of removing them using set technologies. In larger scale the bachelor thesis is concerned with teoretical possibilities of removing sulphur from biogas and following methods used in work experience.
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Biogas as a fuel for cogeneration unit
Domanský, David ; Pěček, Jan (referee) ; Beňo, Zdeněk (advisor)
The objective of this bachelor thesis is a description of biogas as a fuel for cogeneration unit. The exordium is focused on biogas origin, use and storage. The document body deals with principle of cogeneration technology and derived trigeneration technology. In the next part are described the compounds in biogas, which adversely affect the running of cogeneration units. There is also included concrete example of using the cogeneration unit with biogas.
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Biogas yield from various types of biodegradable materials
Lavický, Jiří ; Pěček, Jan (referee) ; Beňo, Zdeněk (advisor)
The objective of this bachelor thesis is a description of the biogas yield from various types of biodegradable materials. In the introductory part there are presented facts about anaerobic technology, production principle of biogas and biogas utilization in practice. The document body deals with biogas yield, there are presented several types of biodegradable materials with biogas yield, there are described material quality effects and their preliminary treatment to biogas yield. Elementary calculation of the biogas yield from particular material is included.
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Treatment of Waste Water Treatment Sludge Prior of its Following Utilization
Pěček, Jan ; Klemeš,, Jiří (referee) ; Žaloudík, Petr (referee) ; Jícha, Jaroslav (advisor)
Industrial production of cellulose is an energy intensive process. Businesses aim to utilized as much input energy, materials as possible while minimizing the waste as well. In addition to the main product – cellulose and large amounts of organically polluted water which is subsequently treated in waste water treatment plants. This PhD thesis deals with formation of suitable mixing formula for sludge from cellulose production and available materials (waste) from close neighborhood of Biocel Paskov a.s. so that well balanced cofermentation products are achieved. This mainly involves grass from lawn maintenance, grass ensilage, potato peels, and leftovers from vegetable processing. Fermentation processes (both mesophilic and thermophilic) of prepared fermentation products were conducted in semi-continuous and continuous laboratory fermentation units. Reduction of organic mass depending on residence time was closely observed as well as production and quality of biogas along with quality of output digestate. Course of process behaviour under controlled pH was tested. Results of particular tests were integrated into graphs. Conclusion of the thesis presents balance scheme drawn for selected variants, and design of real fermentation station with individual buildings, operations, basic machinery and equipment description including investment costs. Financial calculation and expected investment return was conducted in two variants – without subsidies and including subsidies from Operational Programme Renewable Sources of Energy.
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Anaerobic digestion of sludge from pulp and fodder yeast production
Řezáč, Jaroslav ; Beňo, Zdeněk (referee) ; Pěček, Jan (advisor)
The thesis aims to identify suitable and in the locality available raw materials to a commnon fermentation with sludge from pulp and fodder yeast production in company Biocel Paskov a.s.. Introductory chapter briefly describes the mechanisms of penetration of the sludge itself. The following section deals with origin, chemical composition and properties of biogas. The factors affecting the production of biogas are described. A key part of this thesis is a performance of sludge fermentation test and selected mixed substrate. Acquired knowledge is evaluated and the optimum composition of input raw materials with regard to maximum, but also economic recovery of biogas selected. Further, on the basis of obtained data a rough draft of biogas station is done, icluding its energeic and economic balance.
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Biogas plant design
Kocián, Oldřich ; Pěček, Jan (referee) ; Houdková, Lucie (advisor)
The diploma thesis is focused on possibility of usage biologically decompostable wastes in the biogas plant. The first part of this thesis describes principal production of the manure gas and as well concrete biogas plants, where are shown different approaches and technologies. The main target of the thesis is based on biogas plant design for manipulation with biologically communal wastes from VUT v Brno and chosen parts of Brno. To the proper design of the biogas plant precede evaluation of accesible wastes from choosen localities. Since we consider wastes from households, the way of collection of those wastes is designed. The thesis also consider economic balance and assesment of the biogas plant. Investment costs are predicted, process costs are evaluated and as well profit from selling of the electric energy is consider, profits from charges for manipulation with wastes and profits from selling of compost.
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Losses in a pipe line because of the flow of mixed substratums
Vlasák, Bohdan ; Beňo, Zdeněk (referee) ; Pěček, Jan (advisor)
Introductory part of this thesis is aimed on theoretical description, principle and building of biogas stations, which require solution of many different problems. A specific group of the problems concern transport of mixed substrates of different concentrations both in and outside the area of biogas station. A major part of the substrate transport is done by pumping it in pressure pipeline. Experimental work consists of design and description of a measuring circuit. Graphic characteristics for water and gas loss levels are drawn from the measured readings. Multiples of pressure losses by flowage of substrates with different levels of dry basis are graphically expressed with a help of correction coefficients.
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Communication Strategy of Racio, Ltd.
Grandič, Tomáš ; Pěček, Jan (referee) ; Šimberová, Iveta (advisor)
The theme of my Master‘s Thesis called “Communicational Strategy of the company Racio” is the analysis of marketing communication in the company Racio. First part deals with the theoretical solution of process of marketing communication. In the second part I try to assess strengths, weaknesses, opportunities and threats of the company by the help of used analyses. In the last part of Master Thesis I try to propose new communication strategy that will be able to avoid some of weaknesses and threats for the company.
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Elimination of the Exchange Rate Risk for Exportoriented Company
Pěček, Jan ; Trčka, Radek (referee) ; Režňáková, Mária (advisor)
This thesis is focused on elimination of exchange rate risks as well as on possible ways how to ensure the risk, considering actuall situation in the Czech republic and expansive economical crisis in the year 2009. Mentioned is an overview of possible financial derivates and methods how to adapt them to export-oriented company. The work also includes an outline of a question how far the situation would be changed after launching euro.
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