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Výzkum a vývoj zpracování obnovitelných zdrojů na biopaliva a chemické polotovary
Výzkumný ústav organických syntéz a.s., Rybitví ; Pokorný, Michal
Zpráva studuje možnosti využití alkylesterů jako ekologicky přijatelných reaktivních ředidel. Je sledována možnost náhrady těkavých, hořlavých alkydových pryskyřic (xylen, lakový benzín) za rozpouštědla reaktivní (alkylestery nenasycených mastných kyselin) a dále náhrady reaktivního rozpouštědla styrenu metylestery nenasycených mastných kyselin modifikovaných cyklopentadienem. Byla studována katalytická oxidace sekundárních hydroxylových skupin glycerolu. Bylo navrženo technologické zařízení pro rafinaci glycerolu na Pharma kvalitu. Byl připraven návrh technologických linek výroby metylesteru s kapacitou 10 a 25 kt/rok.
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Disposal sites, hazardous waste and its impact on the enviroment, disposal sites management Disposal sites, hazardous waste and its impact on the enviroment, disposal sites management
KAZDA, Jaroslav
The topis of my thesis is waste disposal, especially the disposal site in Lišov run by the firm A.S.A. Inc.. I examine disposal site risks and waste sides impacts on the environment. In the 50th in the last century the solid waste site in Lišov was established. All the disposal produced by urban area inhabitants was deposited in a former brick-clay quarry. After being filled up the site was cultivated and other disposal was deposited in another site nearby {--} also an abondonned quarry. Since 1998, the holder of the disposal site has been the firm A.S.A., Inc., Krajinská 10, 37001 České Budějovice. Nowadays in the disposal site there are seven sectors including a sector for leaking water intake. If necessary, water may flow back to the detention basin, and there is also a degassing system in the disposal site. The disposal site management is being checked - samples of deposit site water, surface water and underground water are being analysed regularly. The hypothesis of negative impacts of disposal sites on the environment was tested in practice. I read through all available information resources to find out that there are hazardous contaminants in the disposal site, some of them in over-limit concentrations, but their migration through underground water was not proved. It means that there is no evidence of a negative impact of the disposal site on the environment and the people living nearby.
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Factors influencing the escape and spread of harmful substances
TESAŘ, Martin
Currently, harmful substances are released to the air more often and they threaten the safety of people because of their increasing amount being operated, stored and transported in the Czech Republic. The present thread is that the disasters in which harmful substances are released do not occur sporadically. Unintentional release may appear during their treatment, storage or transportation for many reasons, especially due to a natural disaster, technical cause or human failure. New causes of release have occurred recently {--} malicious intent and terrorist attack.This thesis creates a complex view of the branches of science and other areas dealing with the spread of harmful substances in the air. Emission of harmful substances is influenced by many factors which are very difficult or sometimes impossible to model mathematically. There exist a lot of mathematical models which differ according to the factor they treat. They concern models of outflow, dispersion and evaporation.The fire brigade in České Budějovice uses only one calculation model for estimating the emission of harmful substances - model ROZEX 2001.The result of this thesis may be used as a model for analysis and assessment of harmful substance release.
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