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.

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...