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Possibilities of separation of phosphorus compounds from sewage sludge
Iliushchenko, Valeriia ; Kalina, Lukáš (referee) ; Opravil, Tomáš (advisor)
This bachelor work deals with the issue of non-renewable natural resource – phosphorus. Phosphorus finds its application especially in the form of the salts of phosphorous acid. The use of phosphorus compounds is very varied from binders for refractory materials, fertilizer to foodstuffs. Due to the fact, that relatively large amount of human activity is bounded with phosphorus and its compounds, it can be assumed that over the time, the amount of phosphorus respectively its compounds will decrease, so the cost will increase. Owing to widespread use of this stuffs, it can be supposed that these substances could be concentrated for example in sewage sludge. Therefore, the object of this study will be the treatment of sewage sludge, where methods for separating phosphorus compounds will be sought. The aim of this bachelor work is to verify, whether sewage sludge can be used as an alternative source of phosphorus.
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Experimental solar drier of sewage sludge
Širůček, Vojtěch ; Niesner, Jakub (referee) ; Houdková, Lucie (advisor)
The master’s thesis is focused on the issue of solar drying of sewage sludge. The sludge management of wastewater treatment plants is described in the first part of this thesis. This theoretical part also deals with description of drying and dryers used for sludge treatment. The second part of the thesis is focused on the experimental solar drying of sewage sludge and the evaluation of the results.
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Acquiring of phosphorus from sewage sludge
Boubínová, Marie ; Chorazy, Tomáš (referee) ; Hlavínek, Petr (advisor)
The diploma thesis is focused on phosphorus recovery from sewage sludge. In the first part of the thesis, research of phosphorus recovery from sewage sludge is explained. Reusing of phosphorus, a critical material of mankind, is expressed with the principles of the circular economy. The second part of the thesis defines the potential of phosphorus extraction from sewage sludge from medium-sized (Trutnov WWTP) and large (Modřice WWTP) wastewater treatment plant and a technical and economic study of the proposed phosphorus recycling system at these wastewater treatment plants is described.
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Sewage sludge incineration
Švehlová, Tereza ; Frýba, Lukáš (referee) ; Bébar, Ladislav (advisor)
The master´s thesis deals with the problem of sewage sludge from wastewater treatment plants and their subsequent incineration. Main aim is compare some possibilities of the energy use of mechanically dewatered sewage sludge and sewage sludge with previous anaerobic pre-treatment for various levels of drying sludge.
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Analysis of biochar aqueous extracts by separation methods
Tučková, Dominika ; Čáslavský, Josef (referee) ; Mravcová, Ludmila (advisor)
This master's thesis deals with the analysis of biochar extracts by separation methods. All analyzed biochar was produced from waterworks sludge by microwave pyrolysis. The aim of the thesis is the optimization of the sample preparation method and its analysis in a laboratory environment. With the ever-growing world population, the problem of a sustainable economy in both agriculture and waste management is becoming increasingly urgent. This fact has led most countries to consider promoting the so-called Circular Economy. The use of sewage sludge as a feedstock for biochar production is perfectly in line with this strategy. So far, however, the short term and the long term benefits and risks of using biochar have not been sufficiently described. Potentially hazardous organic substances were extracted from the biochar extracts by three techniques: liquid-liquid extraction, solid-phase extraction, and solid- phase micro-extraction. The obtained samples were analyzed using the GS-MS/TOF method. The individual methods were compared. Several biochar samples from WWTP Brno and WWTP Drahovice were selected and analyzed to verify the suitability of the selected sample analysis method.
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Utilization of wastewater sluge to green infrastructure
Kozová, Barbora ; Ševčík,, Jan (referee) ; Hlavínek, Petr (advisor)
This bachelor thesis discusses the issue of use of wastewater sludge in green infrastructure in relation to the circular economy. Firstly, it summarizes wastewater treatment technologies and specifications of green infrastructure such as green roofs, walls, and others. Secondly, the thesis compares the affordability of different types of green roofs and green parking. The paper concludes with a final evaluation of the findings.
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Karbonizovaný čistírenský kal a jeho vliv na vybrané půdní parametry
Mikulcová, Kateřina
This bachelor's thesis deals with the effect of carbonized sewage sludge on selected soil parameters. The characteristics of soil and biochar are described and supplemented by a description of its production and importance in the past and present. As part of the practical part of the bachelor's thesis, a container experiment was established in three variants with increasing doses of biochar, which served as a basis for evaluating the selected analyses. The application of biochar positively influenced the increase in plant biomass, there was also an increase in root colonization by arbuscular mycorrhiza, the value of soil pH and the proportion of stable soil aggregates increased. A decrease in dehydrogenase activity was evaluated as an undesirable effect of biochar. The solution to the problem of inhibiting microbial activity is the application of biochar together with another organic fertilizer (manure or compost), which supports microbial activity until the biochar particles themselves become a suitable environment for colonization.
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Acquiring of phosphorus from sewage sludge
Boubínová, Marie ; Chorazy, Tomáš (referee) ; Hlavínek, Petr (advisor)
The diploma thesis is focused on phosphorus recovery from sewage sludge. In the first part of the thesis, research of phosphorus recovery from sewage sludge is explained. Reusing of phosphorus, a critical material of mankind, is expressed with the principles of the circular economy. The second part of the thesis defines the potential of phosphorus extraction from sewage sludge from medium-sized (Trutnov WWTP) and large (Modřice WWTP) wastewater treatment plant and a technical and economic study of the proposed phosphorus recycling system at these wastewater treatment plants is described.
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Utilization of wastewater sluge to green infrastructure
Kozová, Barbora ; Ševčík,, Jan (referee) ; Hlavínek, Petr (advisor)
This bachelor thesis discusses the issue of use of wastewater sludge in green infrastructure in relation to the circular economy. Firstly, it summarizes wastewater treatment technologies and specifications of green infrastructure such as green roofs, walls, and others. Secondly, the thesis compares the affordability of different types of green roofs and green parking. The paper concludes with a final evaluation of the findings.
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