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Austrian Inventory of Greenhouse G as E missions from Waste

Austrian Inventory of Greenhouse G as E missions from Waste. Institutions and Responsibilities. The Austrian Emission Inventory and all reporting obligations are supported by the Umweltbundesamt B y law: environmental control act 1998. Institutions and Responsibilities.

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Austrian Inventory of Greenhouse G as E missions from Waste

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  1. Austrian Inventory of Greenhouse Gas Emissions from Waste

  2. Institutions and Responsibilities • The Austrian Emission Inventory and all reporting obligations are supportedby the Umweltbundesamt • By law: environmental control act 1998

  3. Institutions and Responsibilities Excerpt from the Austrian Environmental Control Act Purpose and Tasks of the Federal Environment Agency are among others: • To establish the technical expertise for compliance with the United Nations Framework Convention on Climate Change........ • To develop and keep inventories, balances, registers, and environmental information systems todocument the state and development of the environment.........

  4. Relevance of CRF Sector 6 „Waste“

  5. Relevance of Source Categories in the CRF Sector 6 „Waste“

  6. Austrian specific Estimation Methods • Method 1 Used to estimate emissions from the disposal of „Residual Waste“ • Method 2 Used to estimate emissions from the disposal of „Non Residual Waste“

  7. Methodology for Emission Calculation of „Residual Waste“ Model of Tabasaran-Rettenberger Gt = 1,868*DOC*(0,014*T+0,28)*(1-10(-kt)) Gt cumulated landfill gas after t years [m3/t humid waste] DOC bio-degradable organic carbon content of deposited waste [kgC/t humid waste] T mean temperature of disposal site [oC] k degradation constant t number of years DOC 200 - 120kg/thumid waste T 30°C k 0,035 Calculation period: 31 years

  8. Sources of Data for the Emission Calculation of „Residual Waste“ • Activity data 1998 to 2003 from the Austrian landfill database managed by the Umweltbundesamt Before 1998 from the Austrian waste management plan recalculated (including residual waste from administrative facilities) • Landfill gas recovery National study • Biodegradable organic carbon National studies • Oxidation Factor IPCC default value

  9. Methodology for Emission Calculation of „Non Residual Waste“ Model of Marticorena Mt = M0*e-(kt) Mtlandfill gas formation potential at time t [m3/t humid waste] M0 landfill gas formation potential [m3/t humid waste] k degradation constant k = -ln (0.5) / t 1/2 t 1/2 mean ‚halflife‘ of readily or slowly degradable waste respectively t number of years • Readily degradable waste: ‚halflife‘ 1-20 years • Slowly degradable waste ‚halflife‘ 20-100 years • Calculation period: 100 years

  10. Sources of Data for the Emission Calculation of „Non Residual Waste“ • Activity data 1998 to 2003 from the Austrian landfill database managed by the Umweltbundesamt Before 1998 no data available • Organic carbon content National studies • Half life National studies

  11. Methodology for Emission Calculation of „Compost Production“: Emission factors

  12. Sources of Data for the Emission Calculation of „Compost production“ • Activity data The activity data were taken from several national studies. For years where no data were available they were inter-/extrapolated or the value of the year before was used respectively. • Emission factors National studies

  13. Which Issues were raised during the UNFCCC Review Process? (1) • 6.B Waste-water Handling: • Information gaps / the methodology used for CH4 emissions from domestic and industrial waste water, is not in line with the IPCC good practice guidance plan to revise the national methodology for the 2006 submission • 6 D Other Waste • Compost production should be reported under 6 A Solid waste disposal on land.  Will be included until submission 06

  14. Which Issues were raised during the UNFCCC Review Process? (2) • 6 A 1 Managed Waste Disposal on Land • Austria used an methane oxidation factor of 0.2 • In this submission because recommended by the ERT (Expert Review team) the IPCC default value was used • the composition of wastes reported in the CRF is constant through the years. = lack of data for the next submission efforts will be made to update the data

  15. Which Issues were raised during the UNFCCC Review Process? (3) • 6 A 1 Managed Waste Disposal on Land (continued) • it would be more appropriate to use extrapolation techniques for those years where no data are available (i.e. non-residual wastes before 1998), instead of considering it as constant  Efforts to improve the time series of non-residual waste will be made for the next submission

  16. Uncertainties in the waste sector • 6 A 1 Managed Waste Disposal on Land • Expert judgement • National Study estimated uncertainty of data of submission 2000: 35% emission factors / 25% activity data • Since then method continually improved  uncertainty of data of submission 2004: 30% emission factors / 15% activity data

  17. Improvements in Sector 6 A 1

  18. QA/QC procedures • Involvement of national experts • Comparison of national methodology with IPCC methodology

  19. Final Slide Thank you for your attention!

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