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The effect of bottom ash pretreatment on heavy metals leaching
Maršálková, Olga ; Šyc, Michal (advisor) ; Pohořelý, Michael (referee)
This bachelor thesis deals with the influence of bottom ash ageing on the leachability of heavy metals. The leachability tests according to ČSN EN 12457-4 and 12457-2 have been carried out with two different bottom ash granulometry and the ratio of the liquid to the solid phase. The results were compared with the classes of leachability according to the Czech legislation and a comparison of the above mentioned standards was made to the infused number of monitored elements. Keywords Leaching tests, bottom ash, leachability, combustion, waste
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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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Mercury Removal from Waste Incineration Flue Gas: Heterogeneous Oxidation and Capture by Waste-Derived Fly Ashes.
Rumayor, Marta ; Pohořelý, Michael ; Šyc, Michal ; Svoboda, Karel ; Švehla, Jaroslav
During waste incineration, all Hg-content is released primarily as elemental mercury (Hg0) which passes into the flue gas and is gradually oxidized. Mainly HgCl2 is formed, by both homogeneous and heterogeneous reactions. Some degree of Hg removal is achieved by existing conventional air pollution control devices (APCDs), normally used to control NOx, SO2, and dust emissions. In this study, three samples of fly ashes from boiler and ESP (characterized by composition, surface area and carbon content) derived from MSW incineration were assessed for mercury removal under MSW incineration conditions in a laboratory scale, using a fixed-bed reactor packed with fly ash. The results obtained showed that unburnt carbon content, composition of flue gas (e.g. mainly HCl and SO2 content) and operating temperature are important variables controlling capture of mercury by fly ash.
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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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