BIOGAS AND LANDFILL GAS CONVERTING TO GAS MOTOR FUEL THROUGH CLATHRATE HYDRATE

Every year the amount of municipal solid waste (MSW) generated increases significantly. The main method of disposal of MSW is still their burial at landfills. Landfill gas emissions into the environment cause negative local and global effects. At the same time, landfill gas is an alternative source of heat and power generation. To simulate the processes of anaerobic decomposition of organic matter contained in the landfill body, a lab-scale biogas plant was developed. Municipal sewage sludge (SS), organic fraction of MSW and their mixture were used as substrates for anaerobic digestion. It has been shown that the methane content in the resulting biogas rarely exceeds 60%, which does not allow it to be used as a motor fuel; in addition, the presence of hydrogen sulfide in biogas (0.01-0.06%) negatively affects the resource of internal combustion engines. For additional purification prior to use as a motor fuel, a technical design of the one-stage gas hydrate production process from biogas and landfill gas has been proposed. The unique properties of gas hydrate and its advantages over other methods of purification and storage of biogas and landfill gas confirm the promising nature of the proposed technology. © 2021, Procedia Environmental Science, Engineering and Management. All Rights Reserved