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Design of Combustion Air Heater
Kareš, Martin ; Šulák, Marek (referee) ; Lisý, Martin (advisor)
This diploma thesis is dedicated to the design of a combustion air heater for a biomass boiler with a water content of over 60%. The first part of the thesis describes biomass and its use in energetics. Furthermore, the stoichiometry of combustion, heat transfer in the exchanger, design of dimensions and air pressure losses are calculated. The last chapter describes the method of air heating regulation.
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Analysis of the heat utilisation from biogas stations for heating
Kareš, Martin ; Lisá, Hana (referee) ; Milčák, Pavel (advisor)
This bachelor thesis deals with the analysis of the use of heat from biogas stations. The first part describes the production of biogas, its combustion efficiency and the development of energy production thus obtained. In the second part it deals with individual solutions of the application of heat produced and in the last chapter it analyses the balance of the specific solution of heat transfer and its impact on the environment.
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Citlivost plůdku hlavatky obecné (Hucho hucho) k anestetikům Eugenol, MS-222 a 2-fenoxyetanol.
KAREŠ, Martin
This diploma thesis, in the introduction, summarizes the known information about anesthesia with the physiological effect of anesthetics on fish, including a description of the various stages of anesthesia. The following are the detailed characteristics of the anesthetics used (Eugenol, MS-222, 2-phenoxyethanol and Propiscin) and describes the biology and breeding of the studied fish species - Hucho hucho and related species. The practical part of the work deals with the assessment of the influence of individual anesthetics (Eugenol, MS-222, 2-phenoxyethanol and Propiscin) on the onset of individual phases of anesthesia (2, 3a, 3b, 4) and the disappearance phase (3b, 3a, 2,). Unless otherwise stated, the average piece weight of the experimental subjects used was in the range. In the case of the anesthetic Eugenol, the effect of temperature (in the range of 5-15°C) and the concentration of the anesthetic bath (in the range of 0.02-0.04 ml.l-1) and the effect of different fish sizes (in the case of 3 groups in the range of average piece weight 4-353g, at a temperature of 10°C and an anesthetic concentration of 0.03 ml.l-1). The efficacy of the anesthetics MS-222, 2-phenoxyethanol and Propiscin was monitored only at 10°C, each at 5 different concentrations (MS-222 at a concentration of 60-140 mg.l-1,2-phenoxyethanol at a concentration of 0.40-0.60 ml.l-1 and Propiscin at a concentration of 0.5-1.5 ml.l-1). Prior to the actual experiments, the fish were adapted for several days to the temperatures at which the monitoring was performed, the day before the actual experiments the fish were not fed. The duration of the experimental fish's stay in the anesthetic bath was always 10 minutes, after which the fish were immediately transferred to a container of clean water of identical temperature and their observation was continued. The achieved results of the onset of individual phases of anesthesia and its fading in individual variants of the experiment are characterized by the average length of time in seconds and the standard deviation. In most cases, the highest onset times of anesthesia were 5°C and 7.5°C. The lowest values of the onset of anesthesia were 12.5°C. The average values of anesthesia fading decreased with higher temperature in most cases, but with higher concentration the onset of fading phases prolonged. The onset of the individual phases of anesthesia and fading were influenced by concentration, temperature, and weight. Orientation test of anesthetics MS-222, 2-phenoxyethanol and Propiscin at 10°C. The mentioned anesthetics showed the same trend, a gradual decrease in the onset of the anesthesia phases with increasing concentration. In the case of MS-222, 20% mortality was monitored at a concentration of 140 mg.l-1. Propiscin shows a significantly longer time for anesthesia to subside at a concentration of 1 ml.l-1. In the monitored size categories at a temperature of 10°C and a concentration of 0.03 ml.l-1 Eugenol, there was no clear trend of the dependence of the onset of individual phases of anesthesia on the size of fish.
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Design of Combustion Air Heater
Kareš, Martin ; Šulák, Marek (referee) ; Lisý, Martin (advisor)
This diploma thesis is dedicated to the design of a combustion air heater for a biomass boiler with a water content of over 60%. The first part of the thesis describes biomass and its use in energetics. Furthermore, the stoichiometry of combustion, heat transfer in the exchanger, design of dimensions and air pressure losses are calculated. The last chapter describes the method of air heating regulation.
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Analysis of the heat utilisation from biogas stations for heating
Kareš, Martin ; Lisá, Hana (referee) ; Milčák, Pavel (advisor)
This bachelor thesis deals with the analysis of the use of heat from biogas stations. The first part describes the production of biogas, its combustion efficiency and the development of energy production thus obtained. In the second part it deals with individual solutions of the application of heat produced and in the last chapter it analyses the balance of the specific solution of heat transfer and its impact on the environment.
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Splňují ryby chované v biologickém rybníku napájeném vodou z ČOV požadavky na hygienickou kvalitu masa?
KAREŠ, Martin
This bachelor thesis focuses on impact analysis of the biological pond on the hygienic quality of the fish flesh. The main aim was to analyse toxic metals, persistent organic pollutants and organoleptic quality in the muscle of common carp (Cyprinus carpio), which was influenced by treated water from the municipal sewage treatment plant (STP). The experimental fish were exposed in biological pond Čežarka supplied by STP treated water and in control pond supplied by water from Blanice river. Toxic metals (Hg, Cd, Pb, As) and persistent organic pollutants (PCB, DDT, HCH, HCB) were analysed in muscle of 4 fish groups exposed for 0, 14, 30 and 90 days. The concentration of toxic metals and POPs were compared with valid hygienic limits for fish meat. An organoleptic evaluation was made at the end of the experiment focusing on the aroma, taste, odd-taste and consistency of fish meat. All measured parameters were in compliance with legislative regulations. Concentration of neither micropollutant exceeded valid hygienic limit. The concentration of observed pollutants in fish muscle after 90 days of exposure showed that the water from sewage disposal plant is not the significant source of analysed substances in the environment. However, the treated water from the STP is significant source of PPCPs, which are not limited for the fish meat by legislative regulations.
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