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The application of chlorine for public swimming pool water disinfection
Wagnerová, Andrea ; Svoboda, František (referee) ; Biela, Renata (advisor)
The bachelor thesis focuses on issues surrounding disinfectants of swimming pool water. The dissertation examines various chlorine based disinfectants as well as chlorine free disinfectants. Part of the thesis compares advantages and disadvantages of different possibilities of securing hygienic swimming pool water. Several complexes of public swimming pools in Brno and its neighbourhood were visited in order to examine the methods of disinfection, which are currently used at those swimming pools. Disinfectants based on chlorine are currently used the most for swimming pool water.
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Design of algorithms for a continuous steam quality measurement system
Hanák, Tomáš ; Tofel, Pavel (referee) ; Holcman, Vladimír (advisor)
This bachelor thesis deals with proposal of algorithm for continuous system of sterilizated steam. At the beginning we deal with the process of sterilization and its methods. Later on we talk over about the saturated steam and parameters of saturated steam. At the end of the bachelors thesis we discuss about current measurement of sterilization steam quality. Then, the procedure of simultaneous measurement of sterilization steam quality is described here. The last part is the evaluation of measured data and presentation of their results.
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Options hygiene of drinking water
Šopíková, Lucie ; Hlaváč,, Jaroslav (referee) ; Biela, Renata (advisor)
The first part my Graduate work contains an overview of all possible types of disinfection of drinking water used in the present. The second part shows examples of use of each mentioned type of drinking water disinfection methods, which can be found in practice, that is on water treatment plants. The conclusion is a comparison of advantages and disadvantages of various methods of disinfection.
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Industrial application of TS displays
Chytil, Lukáš ; Zemánek, Miroslav (referee) ; Boušek, Jaroslav (advisor)
This master thesis describes the design of control unit, which has the task to operate industrial facilities for disinfection of swimming pools or living rooms. The designed control unit is trying to regulate power and flow rate, which is controlled by electronic valve with a flowmetr. The whole design is aimed at minimizing operating costs (mainly consumed liquid oxygen). Interaction with the operator is ensured by the HMI display. There is also an effort to highlight the importance of HMI applications in the industry.
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Influence of disinfectants on the content of lactic acid in the production of refined sugar
Novotná, Hedvika ; Skoumalová, Petra (referee) ; Horák, Radek (advisor)
The diploma thesis compares the effectiveness of disinfectants on the content of the lactic acid. The disinfectants used for the experimental part are formalin and BetaStab®. The content of glucose and lactic acid was observed and compared after processing conventional beet and bio-beet. Based on the analysis of the measured data, it was found that the highest disinfecting effect on the lactic acid content had formalin, the avearge lactic acid value was 275 mg/l. In experiment with BetaStab® disinfection the average value of the lactic acid was 350 mg/l. When the beet was processed without the use of disinfection, this average lactic acid was 371 mg/l and in the untreated treatment of the bio-beet, the lactic acid content was 467 mg/l. The glucose content of formalin disinfection diffusion juice reached an average of 573 mg/l. When BetaStab® disinfection was applied, the average glucose content was 348 mg/l and a similar value was measured for the bio-beet treatment (328 mg/l). The highest glucose content had untreated conventional beet, where an average value of 690 mg/l was reached.
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Comparison of antimicrobial effect of emulsions for cleaning and dissinfection
Chrápavá, Edita ; Dzurická, Lucia (referee) ; Márová, Ivana (advisor)
Currently, hand disinfectants and other disinfectants are in high demand. Due to the pandemic and the spread of Covid-19, they are used by society daily. The reason for their use is not only to prevent the spread of bacteria and other microorganisms from the hands to another part of the body or objects, but also to prevent the spread of the disease. The subject of the bachelor thesis is the control of antimicrobial effects of several commonly available disinfectants using broth and agar dilution methods. From the measured data, the absorbance was processed and subsequently viability of the culture.
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Water treatment and disinfection in outdoor conditions
Hrušková, Barbora ; Načeradská, Jana (advisor) ; Petříček, Radim (referee)
Travel to countries with inadequate sanitation facilities or to the wild involves the risk of contracting pathogenic organisms. There are several options for providing hygienic drinking water in field conditions. The main objective of this paper is to present these options to the reader, to evaluate the advantages and disadvantages of different types of water treatment and disinfection in the field, and to assess the health risk of consuming water treated in field conditions. For while there are a large number of studies on water treatment in water treatment plants, there are few studies on water treatment under field conditions, and in particular the generation of disinfection by-products (DBPs) during field water disinfection. One method to treat water in the field is the use of filtration. Filters can remove suspended solids and bacteria from water due to membranes with pore sizes of about 0.2 μm. The advantage of filters is that they do not encourage the formation of DBPs. On the other hand, 0.2 μm pore sizes may not stop all pathogens. Disinfection with UV light has been shown to be effective, but in turbid water the effectiveness decreases. It is recommended to stir the water with a UV lamp to improve the disinfection results. UV does not produce DBPs, which is an undeniable advantage of this...
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Brominated and iodinated disinfection by-products
Bednář, Jiří ; Načeradská, Jana (advisor) ; Kopecká, Ivana (referee)
The reaction of a disinfectant with natural organic matter in the presence of bromides and iodides in raw water intended as a source of drinking water produces brominated (Br-DBPs) and iodinated disinfection by-products (I-DBPs) of water. These tend to be more cytotoxic and genotoxic than their chlorinated analogues. However, little information is available on these products compared to chlorinated ones. Therefore, the aim of this work was to provide an overview of natural and anthropogenic sources of bromine and iodine containing substances, to determine their influence on the formation of brominated and iodinated disinfection by-products, and to compare their cytotoxicity and genotoxicity with chlorinated products. Increasing seawater intrusion into the groundwater drinking water source was found to increase the concentrations of Br-DBPs and I-DBPs by up to thousands of percent. A number of substances can be released from water pipe material depending on the material. These include, for example, tenorite and copper cation released from copper piping, iron cation released from cast iron and steel piping, and bromides and dissolved organic carbon (DOC) released from plastic piping. All of these corrosion products contribute to increasing concentrations of DBPs in the distribution network. Both seawater and...
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Combination of different drinking water disinfection processes and their impact on the formation of disinfection by-products
Česká, Pavlína ; Načeradská, Jana (advisor) ; Fialová, Kateřina (referee)
Combining disinfection processes with chlorination can alter the formation and resulting spectrum of Disinfection By-Products (DBPs) in drinking water. While considerable attention has been given to DBPs formed during chlorination, DBPs formed during the application of multiple disinfection processes are a significantly less explored group. This study focuses on three most common disinfection combinations: chlorination-UV, UV-secondary chlorination, and ozonation-secondary chlorination. After chlorination, trihalomethanes (THMs) and haloacetic acids (HAAs) are the most commonly found DBPs in water. The resulting formation of DBPs is influenced by many factors. UV radiation at typical disinfection doses (40-186 mJ.cm-2 ) does not affect the formation of these two groups of compounds after treatment with UV radiation and secondary chlorination. During the advanced oxidation process (AOP) of chlorination-UV, generally more DBPs are formed than during chlorination alone. However, this can be partially minimized by adjusting the appropriate wavelength and pH of the treated water. For waters containing nitrogenous compounds or bromide, combining chlorination with UV radiation and chlorination with ozonation leads to higher formation of hazardous nitrogenous and brominated DBPs compared to chlorination...
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