National Repository of Grey Literature 101 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
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.
Material and Energy Utilization of Stabilized Sewage Sludge by Carbonization Process.
Pohořelý, Michael
The lecture discusses sewage sludge disposal situation in EU. It further focuses on the sludge pyrolysis as an alternative method for the sludge utilization on agricultural soil.
Material and Energy Utilization of Dry Stabilized Sewage Sludge.
Pohořelý, Michael ; Moško, Jaroslav ; Šyc, Michal ; Václavková, Šárka ; Skoblia, S. ; Beňo, Z. ; Svoboda, Karel
The paper describes the need for change in the way of sewage sludge disposal in the Czech Republic. The main reason for the change is the amendment to the current Czech legislation.
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Optimization of Gasification Process of Biodegradable Wastes
Elbl, Patrik ; Milčák, Pavel (referee) ; Lisý, Martin (advisor)
The aim of the diploma thesis is to discuss the gasification of biodegradable waste. The theoretical part deals with gasification with focus on gasification phases, types of gasification reactors and pollutants contained in the generated gas, especially tar. Further, there is listed the characteristic of alternative biomass fuels, namely digestate and sludge waste. The practical part is devoted to gasification on a fluidized bed reactor with the aim to test the possibilities of gasification of these fuels, to determine their specifications and the influence of various gasification media. In the final part there are discussed the results of the collected gases and tar.
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.
Hormones in sewage sludge
Jagošová, Klára ; Vávrová, Milada (referee) ; Čáslavský, Josef (advisor)
Currently there is a spate of interest in the presence of pharmacologically active substances in the environment. These substances are excreted in active or metabolized form and with wastewater pass the wastewater treatment plant. Current treatment technologies do not always eliminate all pharmaceuticals effectively and therefore they enter the environment. One of these active groups is the group of steroid hormones. Steroid hormones belong to the group of endocrine disruptors and they are considered to be dangerous for the ecosystems. Due to the hydrophobic character of steroid hormones they undergo partial or total sorption from wastewater to sludge. Sewage sludge is the by product of wastewater treatment and contains heavy metals, organic contaminants and pathogenic bacteria. A part of produced sewage sludge is used as a fertilizer in the Czech Republic. This issue follows the regulation 347/2016 – conditions of agricultural use of sewage sludge. Waste policy of EU will alter the conditions of sludge disposal, so it is necessary to obtain data about the concentration levels, fate and behaviour of those pollutants. This thesis was focused on five natural female hormones and four synthetic, which are used as a part of contraceptive pills and substitutional hormonal therapy. Determination of hormones was performed in four steps including ultrasonic assisted extraction, clean up by solid phase extraction, derivatization and final analysis by gas chromatography with mass spectrometry on triple quadrupole in MS/MS mode.
Elimination of Substances with Antibiotic or Estrogenic Activity from Dewatered Sewage Sludge.
Innemanová, P. ; Šereš, M. ; Pilnáček, V. ; Cajthaml, T. ; Křesinová, Z. ; Pohořelý, Michael ; Moško, Jaroslav
In our study, we focused on substances with inhibitory (antibiotic) and estrogenic (endocrine disruptors) activity to assess the unpredictable risk to the soil environment associated with the usage of sewage sludge as a fertilizer in agriculture.
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Properties of Biochar Produced by Slow Pyrolysis of Stabilized Sewage Sludge.
Moško, Jaroslav ; Pohořelý, Michael ; Skoblia, S. ; Beňo, Z. ; Brynda, Jiří ; Zach, Boleslav ; Šyc, Michal ; Václavková, Šárka ; Jeremiáš, Michal ; Svoboda, Karel
Direct application of stabilized sewage sludge on agricultural soil is currently a big concern because of its significant content of detectable organic micropollutants. Proper sludge treatment should suppress its negative features and produce material suitable for soil amendment. Slow pyrolysis is one of such treatments. We studied the influence of pyrolysis temperature (400-800 °C) on material and energy balances and on elementary composition of the pyrolysis solid residue (biochar). Pyrolysis at higher temperatures resulted in lesser biochar yield and promoted gas yield. The macronutrient content of biochar increased with an increase in pyrolysis temperature (except for nitrogen).
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Stabilized Sewage Sludge Pyrolysis: Properties of the Products.
Moško, Jaroslav ; Pohořelý, Michael ; Skoblia, S. ; Beňo, Z. ; Svoboda, Karel ; Václavková, Šárka ; Brynda, Jiří ; Larkhayeva, K. ; Zach, Boleslav ; Šyc, Michal
Příspěvek se zabývá materiálovou a energetickou bilancí pyrolýzy suchého stabilizovaného čistírenského kalu a základními vlastnostmi a složením pyrolýzních produktů.
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