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Kofermentace biologicky rozložitelných odpadů a čistírenských kalů
Hlavenková, Ema
This thesis deals with using of grass cutting as an entrance substrate for biogas plant used in cofermentation with sludge from waste water treatment and sludge from biogas plant. Tested materials were collected in Brno-Líšeň and Mokrá-Horákov. Grass cutting was tested as a fresh material, dry material and grass silage. Fermentation tests were realized in Republiková referenční laboratoř at Mendelova univerzita in Brno. Temperature during the testing was 42 °C. The production of biogas from fresh grass cutting produced in cofermentation with sludge from waste water treatment was 0,497 m3.kg-1, it contained 0,273 m3.kg-1 of methan. The production of biogas in cofermentation with sludge from biogas plant was 0,474 m3.kg-1 and 0,252 m3.kg-1 of methan. The production of biogas from dry grass cutting in cofermentation with sludge from waste water treatment was 0,416 m3.kg-1 of biogas and 0,230 m3.kg-1 of methan. Cofermentation of dry grass cutting with biogas plant sludge produced 0,399 m3.kg-1 of biogas and 0,208 m3.kg-1 of methan. Last measurement of produced biogas from grass silage in cofermentation with waste water treatment was 0,466 m3.kg-1 of biogas and 0,277 m3.kg-1 of methan. Grass silage and biogas plant sewage produced 0,394 m3.kg-1 of biogas and 0,277 m3.kg-1 of methane.
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Using flotation in water treatment plants
Litschmann, Patrik ; Kučera, Tomáš (referee) ; Biela, Renata (advisor)
The bachelor thesis processes the principle of dissolved air flotation (DAF), its history, modifications and parameters. It also describes efficiency in removing cyanobacteria, algae and turbidity on surface sources. Additionally, the experience with flotation is described at the first separation stage in the Czech Republic and abroad. It has turned out that pre-project preparation, model tests and pilot tests are absolutely crucial for dissolved air flotation. Finally, flotation with sedimentation is compared in terms of flocculation, coagulation, sludge and their economic impacts.
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Screw conveyor
Kaňa, Vojtěch ; Pokorný, Přemysl (referee) ; Jonák, Martin (advisor)
This bachelor thesis deals with proposal tilted screw conveyor in term of calculation and construction solution of tilted screw conveyor for sludge transportation in waste water treatment plant. There is a calculation of the basic parameters, proposal of gearing, proposal of bearings and strength calculation of the main parts. In the attachment we can see drawing documentation.
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Evaluation of operational parameters of sludge pumps.
Kuzmová, Barbora ; Hodáň, Václav (referee) ; Hlavínek, Petr (advisor)
The aim of the bachelor thesis is to determine the parameters of sludge pumps. In the first part of the thesis is processed by a general search of pumps and their basic division. There are described properties of individual pumps. There are mentioned the reasons influencing parameters of the pump. This study is more closely engaged with sludge pumps and their comparison. For review, in the thesis is chart with sludge impellers. In this work are compares channel, vortex, screw and other impellers. This comparison is shown in chart of impellers. There are also described methods of measuring the parameters of the pumps, mentioned test procedures and diagrams of experiments. The practical part is described clogging test. The experiment was conducted on a channel pump. The process and result of the experiment is mentioned in thesis.
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Properties of anaerobic sewage sludge from small producers
Pospíšil, Jaroslav ; Kriška-Dunajský, Michal (referee) ; Hyánková, Eva (advisor)
The bachelor thesis deals with today's wastewater treatment from small producers and characteristics of primary sludge. Work is focused on natural ways of wastewater treatment. The main attention is devoted to the primary sludge. In the next section are based on laboratory tests, where samples are tested properties. There is tested the primary sludge from the mechanical pre-treatment, and namely from the sedimentation tank.
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Sludge Pumping on WWTP
Fadrný, Tomáš ; Medek, Jaroslav (referee) ; Boráň, Jaroslav (advisor)
This diploma thesis deals with the best solution design for a sludge fitting, especially focusing on the right choice of pumps for the waste water treatment plant in Prostějov. The pumps were selected for a circulation pipeline, which heats up the sludge. Several measurements were carried out in order to determine the statistical evaluation of the properties of the pumped medium. The figures gained were used to calculate pressure losses.The diploma thesis is divided into two parts. The first part provides a theoretical analysis of the problem and the second part presents the results and subsequently the reasoning for the new selection of pumps in order to change the WWTP technology from the mesophilic to the thermophilic sludge digestion. The test records describing the testing of the individual samples of the pumped sludge are attached.
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Mathematical model of solar drying of sewage sludge
Ficza, Ildikó ; Houdková, Lucie (referee) ; Hájek, Jiří (advisor)
Solární sušení je mimo jiné energeticky nenáročná a tudíž vysoce ekologická cesta pro zpracování kalů z malých čistíren odpadních vod. Výsledkem tohoto procesu je produkt, který je velmi dobře použitelný v zemědělství jako přírodní hnojivo. V rámci této práce bude sestaven zjednodušený dynamický model sušení vrstvy kalu s jednou prostorovou souřadnicí. Tento model bude diskretizován pomocí vhodné numerické metody a bude provedena jeho implementace do výpočtového programu v prostředí MATLAB.
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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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Dependence of Sludge Dewatering efficiency on amount of flocculant
Volejník, Tomáš ; Medek, Jaroslav (referee) ; Boráň, Jaroslav (advisor)
The target of the first part of this diploma thesis is focused on the problems relating to the sludge production from the wastewater treatment plant and subsequent sludge treatment. Wastewater treatment plant and individual processes from the sludge management are described. The process of the sludge dewatering is described more extensively. Various methods of the dewatering and materials balance are described, too. The second part of this thesis is based on the experiment which took place on wastewater treatment plant Tetčice. The influence of the polymeric organic flocculant dosing on the sludge dewatering was monitored by this experiment. Dependence of the sludge dry matter and filtrate suspended solids content on the specific amount of flocculant was evaluated from experiment’s outputs. Using materials balance and outputs of the experiment, economical balance was made. It made possible to choose the most economic and technologically optimal way of the sludge dewatering on wastewater treatment plant Tetčice.
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Sludge Utilisation from Pulp and Paper Plant
Zemanová, Kateřina ; Houdková, Lucie (referee) ; Boráň, Jaroslav (advisor)
The contens of diploma thesis is description of paper and pulp production and analysis of contemporary problems with disposal of sludges rising on industrial waste water treatment plant. Accent is focuses on description of waste water treatment technique, characteristics of rising sludge and the ways of his liquidation in particular plant for pulp production. Fundamental part of this project is evaluation of power and economics balance of current sludge technology in company Biocel Paskov a.s. and suggested sludge management technology. Balances are based on data gained from measurement in laboratory and on data gained from literary research.
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