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The ash quality monitoring of biomass combustion
Tlustoš, P. ; Ochecová, P. ; Száková, J. ; Perná, Ivana ; Hanzlíček, Tomáš ; Habart, J. ; Straka, Pavel
The aim of methodology was, on the basis of results of analyzes of ash from more than 40 sources in the Czech Republic, these ash categorize by feedstock and identify suitable ash for use on agricultural land. It could lead to a significant shift to reduce the cost of incinerators, to the entry of new businesses on the market and to easier fulfilling of republican obligations in the share of energy production from renewable sources. Another advantage of finding employment for these materials, from an environmental view, is the reduction of landfilling and support for recycling of nutrients. The methodology presented the process for the selection of suitable ash for agricultural purposes and the reader should be able to determine the applicability of the material.
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Biochar Preparation of Various Types of Biomass
Břendová, R. ; Tlustoš, P. ; Száková, J. ; Habart, J. ; Pohořelý, Michael ; Punčochář, Miroslav
Soil contamination by risk elements is a serious problem. There are available remediation methods, using plants to remove these elements from soil. Plants for our experiments were grown on contaminated soil of Příbram area. Biomass of these plants was used to prepare biochar, which could be used then as a soil additive and due to its characteristics, can be able to immobilize risk elements in soil. The experiment was focused on the biochar preparation. There was observed the effect of the type of biomass and the final temperature on specific surface area and yield of biochar: properties limit its application as a soil additive. While the final temperature increased, the specific surface area increased and the yield of biochar decrease. The highest surface area was found at biochar from wood mixture.
Fulltext: content.csg -  PDF
Plný tet: SKMBT_C22012121014260 - PDF
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Influence of Pyrolysis Temperature and Type of Ligno-Cellulose and Cellulose Biomass on Yield, Specific Surface Area and Mechanical Resistance of Active Coal
Pohořelý, Michael ; Břendová, K. ; Krček, M. ; Šyc, Michal ; Punčochář, Miroslav ; Száková, J. ; Tlustoš, P.
In the Czech Republic, there are many contaminated agricultural soils due to anthropogenic activity and geogenic origin. The contaminated biomass of plants grown on the contaminated soils needs to be appropriately disposed of to prevent the re-releace of heavy metals into the environment. One way of processing contaminated biomass is pyrolysis, where the heavy metals are concentrated in biochar (active coal). This can be applied to soil where it improves the physical properties. The aim of the work was to observe the effect of temperature and the type of biomass grown on contaminated soils from a locality Příbram on the specific surface area, yield and mechanic resistance of active coal.
Fulltext: content.csg - PDF
Plný tet: SKMBT_C22012112316131 - PDF
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Changes in cytokinin contents and metabolism in spinach in response to zinc excess in soil
Žižková, E. ; Gajdošová, Silvia ; Pavlíková, D. ; Pavlík, Milan ; Száková, J. ; Motyka, Václav
Changes in endogenous cytokinin (CK) contents and metabolism in spinach (Spinacia oleracea L.) responding to excessive amounts of zinc in soil were studied. Application of three zinc rates in soil (250, 500, 750 mg.kg-1) resulted in a progressive (1.7- to 3.3-times) increase of endogenous CKs in spinach leaves. This increase was predominantly due to accumulation of inactive and storage CK forms (N- and O-glucosides) and was accompanied with an enhanced activity of cytokinin oxidase/dehydrogenase (CKX), the key CK degradative enzyme, especially on the highest zinc rate (750 mg.kg-1 soil). On this rate, maximum endogenous CK concentrations in both control and stressed plants were found at the first and the last samplings, i.e. in the course of very young leaf development and just before or during flowering. The CKX activity of stressed plants exceeded that of controls during the whole development and reached the maxima at the last sampling of treated plants.
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