Сhetveryk H. Energy efficient conversion of liquid waste from biomass gasification in the biogas plant

3. Object of research: process of methane digestion of manure and liquid biomass gasification waste. The purpose of the work: to increase the efficiency of the conversion liquid waste of biomass gasification into biogas by means of digestion with manure in a biogas plant. Research methods: dry matter content and ash content in the dry residue were measured gravimetrically; the duration of the lag phase and the intensity of the methane output were determined using a mathematical model of the methane output dynamics; synergistic method was used to study the stability of the digestion process model; the processing of the experimental data was carried out using mathematical statistics and error theory. Novelty: for the first time under the mesophilic temperature regime there was established the possibility of anaerobic methane conversion of a substrate containing cow manure and condensate of wood biomass gasification the mass fraction of which in the substrate is up to 8 %; it was first established that with the increase of the mass fraction of condensate in the substrate the degree of destruction of dry organic matter of manure decreases, and the increase of the biogas output occurs due to the processing of organic condensate substances; a synergy method for analyzing the stability of the digestion process model to small perturbations of the medium temperature and the content of dissolved organic matter in the substrate which made it possible to determine the correlation between the coefficients of the thermal diffusion system, in which the auto oscillations of the medium temperature and the content of the dissolved organic matter in the substrate are possible and the possible formation of dissipative structures; energy efficient technology of biogas plant and syngas plant is developed in which by the use of thermal energy of wet generator gas the consumption of thermal energy for the operation of the biogas plant reduces and ensures the disposal of harmful components of condensate with an additional increase in the output of biogas. Implementation of the results of work: The results of the work are implemented in the educational process at the Department of Renewable Energy Resources of the Faculty of Electric Power Engineering and Automation of the National Technical University of Ukraine "KPI" as well as at the company "Zatolohny R.P" which is engaged in the production of biochar. Scope: Scientists and organizations involved in the development of bioenergy in Ukraine.