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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.
Fulltext: content.csg - PDF
Plný tet: SKMBT_C22018012410160 - PDF
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Material and Energy Utilization of Dry Stabilized Sewage Sludge – Production of Biochar by Medium-Temperature Slow Pyrolysis.
Pohořelý, Michael ; Moško, Jaroslav ; Zach, Boleslav ; Šyc, Michal ; Václavková, Šárka ; Jeremiáš, Michal ; Svoboda, Karel ; Skoblia, S. ; Beňo, Z. ; Brynda, J. ; Trakal, L. ; Straka, Pavel ; Bičáková, Olga ; Innemanová, P.
The article summarizes the main properties of biochar produced by medium-temperature slow pyrolysis of anaerobically stabilized sewage sludge.
Fulltext: content.csg - PDF
Plný tet: SKMBT_C22017071208540 - PDF
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Use of microwave pyrolysis products
Zdeňková, Petra ; Macsek, Tomáš (referee) ; Hlavínek, Petr (advisor)
This bachelor thesis focuses on the use of microwave pyrolysis products. The first part deals with microwave pyrolysis and the use of products from it in industry. The second part of the thesis describes the testing of the waste water sample from the municipal WWTP on a filter column filled with a biochemist. The aim of this thesis is to determine the efficiency of removal of selected microcomputers
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The possibilities to combine biogas production and biowaste hydrothermal carbonization
Usťak, Sergej ; Honzík, Roman ; Muňoz, jakub
The objective of the methodology is to provide to farmers, agricultural consultants, owners and operators of biogas plants, to biowaste producers and processors, to experts in the field of soil reclamation and melioration, to investors and other interested parties on the concerned issues, the basic information about the potential at the combination of biogas production and biowaste hydrothermal carbonization. These options are evaluated on the basis of processing at accumulated energy intensity for the above combined processes and its comparison with conservative biogas production using the example biogas plant with installed electrical capacity of 800 kW. Part of the methodology is guided to evaluate the potential use of thermo- pressure hydrolysis unit as a device for digestate hydrothermal carbonization and other wastes in order to improve their performance, particularly in terms of employment in agriculture as highquality substrates for soil fertilization and for the purpose of soil carbon sequestration.
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Influence of sorbents on retention curve of contaminated fluvisol
Hnatajková, Eva ; Jačka, Lukáš (advisor) ; Pavlásek, Jiří (referee)
The thesis deals with the influence of sorbents on the retention curve of the contaminated alluvial soil (fluvisol). The retention curves of soil without sorbents (reference soil) are compared with the soils enriched by the following sorbents. Biochar (BC), amorphous manganese oxide (AMO) and combination of (AMO + BC). Soils sample were collected is specific uncultivated area in the valley of Litavka river (located in the central part of the Czech republic).
Two different types of samples were used for measurement of retention curves. First type of the samples were collected from the column experiments and second type were the samples collected in the field. All samples were extracted using in Kopecky rings (100 cm3). The measurement of the retention curves was performed by a direct method in the laboratory. For laboratory determination of the retention curves classical set of instruments were used (sandbox, sand-kaolin box and pressure apparatuses). The measured data were fitted using van Genuchten. Values compared are the bulk density, parameters of van Genuchten model (Thétas, ThétaR, Alfa, n), and values pF (0; 1.0; 2.0; 2.7; 3.0; 3.7; 4.18). The comparison of retention curves of differently treated soil was based on the average, standard deviation and the difference and ratio of the avarages.
According to presented findings sorbents affected shapes of the retention curves. Especially biochar influence water content for high pF values. We confirmed the hypothesis according to VERHEIJEN et al. (2010), that biochar tincrase the total retention of soil water, but does not increase the amoust of water avaible plants.
The influence of AMO on retention curve was negligible. Therefore sorbent AMO has a small influence on change of water retention in the tested soil. The effect of combined sorbent (AMO + BC) on the retention more significant than effect of using AMO sorbent only. This combination of sorbents affects the water retention depending on applied pF.
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