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Methods and technologies for carbon dioxide capture in industrial plants
Rek, David ; Máša, Vítězslav (referee) ; Sukačová, Kateřina (advisor)
The rising level of carbon dioxide in the atmosphere has negative effects on life on our planet. Humanity is now dealing with the issue through multinational organizations which attempt to motivate the current industry to develop innovative solutions to increase the energy-efficiency while lowering the amount of produced emissions. The most affected are energy-intensive sectors of the industry, such as the ceramics industry. This diploma thesis is based on a thorough research conducted on scientific literature, mainly scientific articles. The theoretical part is to familiarize one with the issue of rising levels of carbon dioxide. Next, methods to capture, store and use the gas are presented. Furthermore, the thesis focuses on one such method – microalgal bioreactors. The practical past weighs the usability of microalgal bioreactors for the purpose of carbon dioxide emissions capture in a production company LASSELSBERGER, s.r.o. belonging to the ceramic industry. Tubular bioreactor with a volume of 2000 m3 would process 3,75 % of CO2 produced by the core production machine – spray drier, during this process 367,92 tons of microalgal biomass would be produced annually.
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Effect of light on microalgae growth
Adamec, Matěj ; Sukačová, Kateřina (referee) ; Naď, Martin (advisor)
Light is one of the key elements affecting the growth of photoautotrophic algae in photobioreactors. For optimal cultivation in such a device, sufficient access to light radiation to the microalgae is required sufficient light intensity is needed. In this work, considerable attention is paid to the influence of light during the whole photosynthesis process. Viable solutions for the illumination of the photobioreactor by natural and artificial light are evaluated in detail, including a description of its main parameters. The design of a programmable illumination for a newly designed photobioreactor with eight horizontal tubes and a control calculation of PPFD (Photosynthetic Photon Flux Density) were performed. Afterwards, the designed illumination was implemented on the newly built photobioreactor to evaluate the effect of photoperiod length and LED light coloration on the actual microalgae cultivation. Based on these data, the optimal photoperiod length could be determined, and ratios of 12:12, 18:6, and 24:0 (light phase:dark phase) were tested. Finally, to evaluate the spatial distribution of the photobioreactor illumination, CFD simulations of selected photobioreactor tubes were performed using simulation software ANSYS FLUENT.
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Methods and technologies for carbon dioxide capture in industrial plants
Rek, David ; Máša, Vítězslav (referee) ; Sukačová, Kateřina (advisor)
The rising level of carbon dioxide in the atmosphere has negative effects on life on our planet. Humanity is now dealing with the issue through multinational organizations which attempt to motivate the current industry to develop innovative solutions to increase the energy-efficiency while lowering the amount of produced emissions. The most affected are energy-intensive sectors of the industry, such as the ceramics industry. This diploma thesis is based on a thorough research conducted on scientific literature, mainly scientific articles. The theoretical part is to familiarize one with the issue of rising levels of carbon dioxide. Next, methods to capture, store and use the gas are presented. Furthermore, the thesis focuses on one such method – microalgal bioreactors. The practical past weighs the usability of microalgal bioreactors for the purpose of carbon dioxide emissions capture in a production company LASSELSBERGER, s.r.o. belonging to the ceramic industry. Tubular bioreactor with a volume of 2000 m3 would process 3,75 % of CO2 produced by the core production machine – spray drier, during this process 367,92 tons of microalgal biomass would be produced annually.
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Odstraňování nutrientů řasovými biofilmy během dočišťování odpadních vod
Sukačová, Kateřina
Presented PhD theses deals with evaluation of use of algal biofilms for nutrients removal from wastewater. The integral part of research was estimation of the comprehensive benefit of the presented technology, including biomass production and phosphorus recovery. The algal biofilm was able to remove 98 % of phosphorus after 24 hours when the PO4-P concentrations in inflowing water ranged from 3 to10 mg.L-1. Different patterns of phosphorus and nitrogen removal were observed. Daily quantity of removed NO3-N ranged from 2 % to 25 % and was highly depended on solar irradiance. The studied biofilm system has a high efficiency for phosphorus removal and, therefore, has great potential for integration into wastewater treatment processes.
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The usage of algae in biogas transformation
Paroulkova, P. ; Sukačová, Kateřina ; Murgasová, K. ; Vítěz, T. ; Chovanec, J.
Using of algae in a biogas transformation is still in the beginning. However, the microalgae have large potential from the perspective of growing demands on biogas quality and trend of using,natural resources. First of all, it is their ability to fix carbon dioxide (CO2) using photosynthesis and presumed ability of some algae to metabolize hydrogen sulphide (H2S). Biogas contains not only required methane but also components causing its worse quality such as mentioned CO2 and H2S. Therefore, the algae are potential biological systems for biogas-conditioning. The microalga Chlorella pyrenoidosa Chick (IPPAS C2) was used for fixation of CO2 and H2S in our experiment. The microalgae were cultivated in a medium BG 11. The algal suspension was aerated with the biogas during two weeks. Different values of CO2 concentration measured in the input and output confirmed decrease of CO2 caused by intensive growth of algal culture. Decline of H2S was not confirmed.
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