National Repository of Grey Literature 45 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
Verification of the use of agro pellets for heating
Muzikářová, Věra ; Vavříková, Petra (referee) ; Baláš, Marek (advisor)
This bachelor thesis deals with agropellets and their combustion in terms of emissions and efficiency. It consists of two parts. The first part is theoretical, where the search of available types of biomass, production of agropellets and combustion principle is presented. The second part of the thesis is focused on experimental comparison of efficiency and emission class of boiler for various agropellets.
Forming of solid pollutants from biomass
Havlínová, Denisa ; Štelcl, Otakar (referee) ; Baláš, Marek (advisor)
This bachelor‘s thesis is divided into two main parts. The first part is research and deals mainly with biomass and pollutants. In this section, we will find a two-dimensional distribution of biomass, a comparison of fuel forms and a discussion of basic pollutants with a focus on solid pollutants. The second part is experimental. It starts with a fuel laboratory, where the water, ash and heat content of the biofuels examined is determined. The following is an investigation of the dependence of the PM formation on the properties of the biomass, which was measured by the measurement of these PM by the filters in the collecting device, while the examined biofuels were gradually burned on the fireplace insert.
Optimization of Agro-Pellets Boiler
Kurečková, Andrea ; Jecha, David (referee) ; Lisý, Martin (advisor)
The diploma thesis deals with optimization of pellet boiler for agropellets combustion. On the Czech market are mostly available boilers for burning wood pellets. Specially adapted agropellet boilers are pretty expensive. The work is divided into two main parts. The first part contains a research of agropellets, agropellets production and combustions of agropellets. The second part is experimental and describes the combustion test. It describes the measurement procedure, the necessary calculations and evaluation.
The Issue of Waste Water and its Inclussion in Biology Education
Rychtecká, Karolína ; Skýbová, Jana (advisor) ; Říhová, Dagmar (referee)
This bachelor thesis deals with the topic of wastewater treatment and its use in elementary education. It consists of theoretical and practical part. The theoretical one sums up all types of existing wastewater and polluting substances, besides that it includes the techniques for determinig organic substances. Third chapter deals with water purification through out the history - from the early civilizations to the 20th century. This chapter provides a much needed context for the rest of the thesis. Current techniques of water purification are mentioned in the fourth chapter where are also listed the most common types of water purification facilities. The last chapter of the theoretical part is dedicated to a didactic game for elementary school teaching. Practical part of the thesis consists of recommended activities for educating students about wastewater treatment and the responsibilities we all have concerning this topic. KEYWORDS Pollutants, wastewater treatment plant, history of wastewater treatment, techniques of wastewater purification, didactic game
Evaluation of effectiveness removing pesticides of reconstructed water treatment plant
Kovačíková, Kristýna ; Šubrt, Michal (referee) ; Biela, Renata (advisor)
Diploma thesis deals with assessing of effectiveness removing pecticides of reconstructed water treatment plant. In the introduction ismade a short research focused on pesticides, their getting into sources of drinking water and possibilities their removing by water supply processes. As part of this work are assessed effectiveness of this processes for removing pesticidal substances on specific water treatment plant and its sources of drinking water. Is made description of technology water treatment plant before and after the reconstruction, measured data of concetration pesticides in the sources and in the output from water treatment plant is processed to the tables and to the graphs. In conclusion are assessed effectiveness of the new technology for removing selected pesticidal substances and their metabolites.
Dry Flue Gas Treatment: Preparation for Experimental Campaign and Preliminary Experiments.
Zach, Boleslav
Before we could start the experiments, it was necessary to test all sections of the unit. We have tested the stability of the flue gas composition, pressure and flow rate measurements, filter cake formation, cleaning of filters, and regulation of temperature and pressure at various places of the unit.\n\n\n
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Effect of selected endocrine disruptors on the male mouse reproductive system in vivo
Žatecká, Eva ; Pěknicová, Jana (advisor) ; Kubelka, Michal (referee) ; Kaňka, Jiří (referee)
In our environment there are many compounds which can negatively influence humans and wildlife. Every day, a vast number of environmental pollutants are released into our environment and there is no way to avoid their exposure. Some of these compounds can even mimic endogenous hormones and interfere with our endocrine system (so called endocrine disruptors), which is the key regulatory system controlling almost all physiological processes in human and animal bodies. Also the reproductive system is largely regulated by various hormones, and their proper function is crucial for gamete formation, fertilization and embryo development. Environmental pollutants are therefore considered as one of the possible causes of increased infertility in human population. This prompted us to study the effect of two endocrine disruptors (tetrabromobisphenol A - TBBPA, and zearalenone - ZEA) on the male mouse reproductive system in vivo. According to our results, TBBPA is able to induce apoptosis as well as changes in the expression of selected testicular genes and sperm protamination. Our results also suggest that permanent exposure to TBBPA slightly enhances its effect in the next generation, depending on whether the parents have been affected or not. We hypothesized that differential protamination of the sperm DNA...
Variability of water quality parameters in selected reservoirs in Prague
Stará, Eva ; Ettler, Vojtěch (advisor) ; Chalupová, Dagmar (referee)
Small water reservoirs in urban areas have important landscape-forming and environmental roles. However, numerous anthropogenic activities can influence the water quality in these urban ponds. This thesis evaluates and compares the water quality in selected ponds in Prague area (Motol, Stodůlky, Háje) by means of regular water monitoring between May and November 2013. Parameters commonly used as indicators of anthropogenic load were monitored (NO3 - , NH4 + , PO4 3- , Cl- , dissolved oxygen, chemical oxygen demand) and supplemented with the investigation of other chemical and physico-chemical parameters (alkalinity, acidity, water hardness, pH, Ca2+ , NO2 - , specific conductivity). Data were evaluated using Czech technical norm (ČSN - EN 75 7221), which defines five categories of surface water quality. Our data indicated that surface water from reservoirs in Motol exhibited the best water quality (1st category), reservoirs from Stodůlky were slightly polluted and reservoirs from Háje exhibited the poorest water quality (with some parameters exhibiting values corresponding to the 4th category). We found statistically significant correlations between the alkalinity, water hardness, COD and concentrations of NO3 - , Ca2+ , Cl- and PO4 3- . Moreover, numerous parameters are dependent on cumulative...
Basic haematological parameters and their influencing by pollutants in common carp a review
The objective of this study was to describe the methods of determining the main haematological parameters and obtain as much information as possible about pollutants that may influence them. The subject of this thesis is the common carp (Cyprinus carpio L.). As far as pollutants are concerned, I focused on nitrogen compounds (ammonia, nitrite and cyanide), metals (Zn, Cu, Fe), heavy metals (Hg, Cd, Pb, Cr), petroleum substances, pesticides (organophosphates, triazines and diazines, pyrethroids), pharmaceuticals and natural supplements and persistent organic pollutants. Collected information imply that heavy metals and pesticides have the most important effect on haematological parameters of the common carp. Heavy metals cause changes in haematological parameters and cell anomalies and pesticides may cause haematopoietic failure, which especially means a decrease of number of red blood cells, the concentration of haemoglobin, the haematocrit value and the changes in the presence of different leukocyte forms. This study summarizes the knowledge of the effects of the aforementioned pollutants and highlights the danger of their effect as well as the possible threat to fish health, not just of the common carp. The information dealing with the effects of many pollutants on the blood parameters of fish is missing in available scientific literature.
Environmental aspects heating
Vypušťáková, Veronika ; Poláčik, Ján (referee) ; Baláš, Marek (advisor)
The topic of this bachelor´s thesis is ecological impacts of heating. The first part contains information on selected pollutants that adversely affect the environment and human health. The second part is devoted to the comparison of pollutants in boilers for solid, liquid and gaseous fuels. The last third part focuses on proposals for measures to eliminate undesirable effects of pollutants.

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