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Study of biodrying technology for MSW
Pilnáček, Vojtěch ; Benešová, Libuše (advisor) ; Innemanová, Petra (referee)
Main objective of the work was to design and construct a model biodrying reactor and to try out two aeration regimes. Additional objective was to asses usability of the process for Czech waste. Model reactor was successfully designed, constructed and put into operation. Two different aeration regimes were examined: regime controlled by oxygen concentration and regime controlled by temperature in upper layer of the reactor. Better results in light of net calorific value and moisture elimination had regimes controlled by temperature in upper layer of the reactor. In light of energy budget regime controlled by oxygen concentration n. 2 performed better. Results strongly depend on composition of waste (organic fraction content) and ambient air moisture. On the basis of these results new interesting questions arise. Czech waste is energetically usable for processing by biodrying. From economic point of view insufficiency of market for produced fuel is a main problem.
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Výzkum možností energetického využití biologicky dosoušené biomasy =: Research of the possibilities of energy utilization of biologically dried biomass /
John, Jakub
The aim of the thesis is to verify and experimentally prove that there is technically possible and economically, energetically and environmentally rational to produce solid fuel from biodegradable waste with parameters of solid alternative fuel according to planned legislation and to design equipment for such production. This research is carried out through literary research of similar solutions and past research and scientific publications, own experimental work and design of the technology. The experimental determination of the thermal performance of aerobic fermentation processes for subsequent utilization in biomass bio drying, the analysis of dependence of energy properties of the material on the input material composition, the theoretical demonstration of feasibility of the biomass bio drying technology without additional heat source and the design of the technology that would experimentally and theoretically described phenomena introduce into industrial practice.
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Utilization of phospholipid fatty acids analysis for biodrying study
Stránská, Štěpánka ; Cajthaml, Tomáš (advisor) ; Innemanová, Petra (referee)
The aim of this thesis is the utilization of phospholipid fatty acids (PLFA) analysis to determine groups of microorganisms present during the biodrying of sewage sludge and their description in relation to the temperature regime of the biodrying. Four experimental cycles A, B, C, D were followed. Cycles A, B and C, D differred from each other in the sewage sludge collected from two waste water treatment plants. The cycles A, B, C and D were each performed in two reactors with different aeration regimes to compare the mesophilic (max. temperature ±50 řC) and thermophilic (max. temperature ±70 řC) regimes of biodrying. PLFA analysis was used to determine the microbial groups. Concentrations of individual PLFA were subjected to principal component analysis (PCA). The total PLFA concentration corresponding to total microbial biomass was decreasing during both temperature regimes of cycles B, C, D, while the total PLFA concentration increased towards the end of both temperature regimes of cycle A. The total PLFA concentration reached statistically higher values at the end of the mesophilic regime of cycles B, C and D. The development of fungi to bacteria ratio showed that fungi applied more with the progression of both temperature regimes of cycles A, B and the thermophilic regime of cycle C. Based on...
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Production of an alternative fuel from digestate using bio-drying method
Rákosník, Vítězslav ; Innemanová, Petra (advisor) ; Šváb, Marek (referee)
Biogas represents one of the renewable sources of energy, which has been growing on use rapidly over the past decades. Biogas is produced during anaerobic digestion of organic material in biogas plants and it is most frequently used for heat and electricity production purposes. There are still plenty of unresolved questions as it is with the other renewable sources of energy. One of the most actual topics is the question of the subsequent usage of a digestate - side product of the biogas production process. Digestate is generally applied as an organic fertilizer for farmlands, but there are tendencies to use its solid phase for another energy producing processes or eventually as farm animal bedding, which is unfortunately connected with few problematic aspects such as transportation and storing of the biologically unstable material with high amount of water in it. Answer to those challenges could be provided by the bio-drying of the digestate's solid phaze - substrate is dried up by heat produced during the microbial decomposition of organic matter and artificial aeration. The main objective of the experimental part of this thesis was to comprehensively test the process of bio-drying of unmodified solid phase of digestate from different biogas plants with agricultural origin for the purpose of...
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Study of biodrying technology for MSW
Pilnáček, Vojtěch ; Benešová, Libuše (advisor) ; Innemanová, Petra (referee)
Main objective of the work was to design and construct a model biodrying reactor and to try out two aeration regimes. Additional objective was to asses usability of the process for Czech waste. Model reactor was successfully designed, constructed and put into operation. Two different aeration regimes were examined: regime controlled by oxygen concentration and regime controlled by temperature in upper layer of the reactor. Better results in light of net calorific value and moisture elimination had regimes controlled by temperature in upper layer of the reactor. In light of energy budget regime controlled by oxygen concentration n. 2 performed better. Results strongly depend on composition of waste (organic fraction content) and ambient air moisture. On the basis of these results new interesting questions arise. Czech waste is energetically usable for processing by biodrying. From economic point of view insufficiency of market for produced fuel is a main problem.
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