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Efficacy of combined dosing of coagulant and flocculant on wastewater sludge dewatering
Pániková, Kristína ; Novotná, Věra (referee) ; Hrich, Karel (advisor)
Sludge treatment and disposal are one of the most important parts of sewage treatment. These are economically challenging parts, and therefore emphasis is placed on effective dosing. The dose should be as small as possible but also the highest dry matter output. The main target of this diploma thesis is therefore to show that it is possible to achieve the same or better degree of drainage of the sludge if different flocculant/coagulant ratio is applied to the sludge. Diploma thesis deals with determination of the optimal combination of chemical doses during sludge dewatering. The thesis contains two parts, practical and theoretical. The theoretical part consists of research, overview of processed research and works in the area of sludge dewatering. The second part is a description of laboratory measurements and evaluation of results.
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Optimization of laboratory denitrification test
Novotná, Klára ; Pániková, Kristína (referee) ; Malá, Jitka (advisor)
Leaching from agricultural fields not only releases high concentrations of nitrates into surface and groundwater, but also, for example, pesticides. The aim of this bachelor thesis is to optimize the input nitrate concentration of a laboratory denitrification test. This test will allow the study of the influence of different pesticides on the denitrification process and also the monitoring of their fate during this process. The theoretical part of the thesis describes the nitrogen cycle and its forms, the denitrification process and the factors that influence its progress are discussed in detail. In the practical part, a 28-day laboratory denitrification test was performed. Analytical methods used are described in the thesis as well as the process and the results of the laboratory experiment. Based on chemical oxygen demand profile, N-NOx concentration profile and denitrification rate, an input nitrate concentration of 15 mg.l-1 was recommended.
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Laboratory test of denitrification inhibition
Marková, Jana ; Pániková, Kristína (referee) ; Malá, Jitka (advisor)
The bachelor thesis is focused on testing the influence of given parameters in order to maintain the required conditions of the denitrification inhibition test, developed at the Institute of Chemistry, Brno University of Technology. The aim of the bachelor thesis is to optimize the parameters of the laboratory test, which with such defined parameters will be used to test the effects of pesticides on the denitrification process and will allow monitoring the fate of these substances during the denitrification process. The theoretical part of this work describes the basic information about the denitrification process and the factors that directly affect it. The practical part describes the three gradually performed laboratory tests using appropriate analytical methods. The measurement results are compiled into tabular and graphic form. Based on a critical evaluation of these outputs was created a test methodology with optimized parameters.
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Optimization of laboratory denitrification test
Novotná, Klára ; Pániková, Kristína (referee) ; Malá, Jitka (advisor)
Leaching from agricultural fields not only releases high concentrations of nitrates into surface and groundwater, but also, for example, pesticides. The aim of this bachelor thesis is to optimize the input nitrate concentration of a laboratory denitrification test. This test will allow the study of the influence of different pesticides on the denitrification process and also the monitoring of their fate during this process. The theoretical part of the thesis describes the nitrogen cycle and its forms, the denitrification process and the factors that influence its progress are discussed in detail. In the practical part, a 28-day laboratory denitrification test was performed. Analytical methods used are described in the thesis as well as the process and the results of the laboratory experiment. Based on chemical oxygen demand profile, N-NOx concentration profile and denitrification rate, an input nitrate concentration of 15 mg.l-1 was recommended.
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The Behaviour of Atrazine under Denitrification Conditions
Pániková, Kristína
Atrazine is one of the most persistent pesticides. This substance negatively affects the environment and the human body. It is a frequent contaminant of groundwater, in which ideal conditions for the denitrification process prevail. Using a methodology of long-term testing, atrazine was investigated under denitrification conditions, as well as its transformation behaviour and effect on the denitrification process itself. After 28 days, adsorption on poplar shavings was observed as the dominant process, 30.6%. A biotic loss of 9.8% was found, and, at a concentration of 0.1 mg/l, atrazine did not significantly affect the denitrification process. Stimulation reached the value of 6.9%.
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Laboratory test of denitrification inhibition
Marková, Jana ; Pániková, Kristína (referee) ; Malá, Jitka (advisor)
The bachelor thesis is focused on testing the influence of given parameters in order to maintain the required conditions of the denitrification inhibition test, developed at the Institute of Chemistry, Brno University of Technology. The aim of the bachelor thesis is to optimize the parameters of the laboratory test, which with such defined parameters will be used to test the effects of pesticides on the denitrification process and will allow monitoring the fate of these substances during the denitrification process. The theoretical part of this work describes the basic information about the denitrification process and the factors that directly affect it. The practical part describes the three gradually performed laboratory tests using appropriate analytical methods. The measurement results are compiled into tabular and graphic form. Based on a critical evaluation of these outputs was created a test methodology with optimized parameters.
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Efficacy of combined dosing of coagulant and flocculant on wastewater sludge dewatering
Pániková, Kristína ; Novotná, Věra (referee) ; Hrich, Karel (advisor)
Sludge treatment and disposal are one of the most important parts of sewage treatment. These are economically challenging parts, and therefore emphasis is placed on effective dosing. The dose should be as small as possible but also the highest dry matter output. The main target of this diploma thesis is therefore to show that it is possible to achieve the same or better degree of drainage of the sludge if different flocculant/coagulant ratio is applied to the sludge. Diploma thesis deals with determination of the optimal combination of chemical doses during sludge dewatering. The thesis contains two parts, practical and theoretical. The theoretical part consists of research, overview of processed research and works in the area of sludge dewatering. The second part is a description of laboratory measurements and evaluation of results.
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