Biogas production in regional integrated biodegradable waste treatment – Possibilities for improving energy performance and reducing GHG emissions

摘要: Jouni Havukainen Biogas production in regional integrated biodegradable waste treatment – Possibilities for improving energy performance and reducing GHG emissions Lappeenranta 2014 128 pages Acta Universitatis Lappeenrantaensis 594 Diss. University of Technology ISBN 978-952-265-664-3, 978-952-265-665-0 (PDF), ISSN-L 1456-4491, ISSN 1456-4491 The greatest threat that the causes on environment is methane produced landfills by decomposition this waste. Landfill Directive (1999/31/EC) aims to reduce landfilling In Finland, 31% municipal ended up into 2012. pressure disposing greatly increased forthcoming landfill ban Finland. There a need discuss increasing utilization renewable utilize way allows best possibilities emissions. objectives thesis are: (1) find important factors affecting recovery from waste, (2) determine main balance biogas system how improve it (3) ways define systems what affects it. According thesis, most amount available feedstock, properties selected technologies, demand material products economic situation utilizing feedstocks. anaerobic digestion was seen as technology agriculturally dense areas. reason manure can be utilized with digestion, which produce while maintaining spreading nutrients arable land. plants should located close heat would enough receive also summer months agricultural area where digestate could utilized. Another option use upgrade biomethane, require location natural gas grid. attractive masses are industrial because gate fees plant receives them provide over 80% income. On other hand, directing fee small-scale make dispersed more economical. addition, combustion dry such straw greater than digestion. complete assessment requires one boundary. These then used calculating output– input ratios production, plant, system, analyze different parts chain. At moment, difficult compare since there wide variation definitions production. A consistent analyzing allow comparing each finding possible locations further improvement. Both emission point view, consumption at significant factor. Renewable fulfil parasitic efficient plant. reductions upgrading biomethane displacing or petrol cars when compared CHP mineral fertilizers were less significant, N2O might surpass fertilizers.