Kopenhagen 2-3 Mai 2005 | Folie 1. Kopenhagen 2-3 Mai 2005 | Folie 2 Austrian Inventory of...

Kopenhagen 2-3 Mai 2005 | Folie 1


Austrian Inventory of Greenhouse Gas Emissions from Waste


Institutions and Responsibilities

The Austrian Emission Inventory and all reporting obligations are supported by the Umweltbundesamt

By law: environmental control act 1998


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 to document the state and development of the environment.........


Relevance of CRF Sector 6 „Waste“

GHG BY 2003 Trend BY -2003

BY 2003

Emissions [Gg CO2e] Share [%]

Total 78 535 91 566 16.6% 100% 100%

1 Energy 54 946 69 331 26.2% 70% 76%

2 Industry 10 115 11 046 9.2% 12.9% 12%

3 Solvent 515 426 -17.3% 0.7% 0%

4 Agriculture 8 456 7 349 -13.1% 10.7% 8%

5 LUCF -9 013 -12 773 41.7% -11% -14%

6 Waste 4 503 3 415 -24.2% 5.7% 4%


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

Emissions[Gg CO2e]

6 A 6 B 6 C 6 D

2000 3 056.57 457.23 11.31 76.87

2001 2 948.17 493.06 11.26 77.49

2002 2 882.74 493.12 11.29 77.96

2003 2 828.85 495.19 11.29 79.25


Austrian specific Estimation Methods

Method 1 Used to estimate emissions from the disposal of „Residual Waste“

Method 2Used to estimate emissions from the disposal of „Non Residual Waste“


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 constantt number of years

DOC 200 - 120kg/thumid waste

T 30°Ck 0,035Calculation period: 31 years


Sources of Data for the Emission Calculation of „Residual Waste“

Activity data1998 to 2003 from the Austrian landfill database managed by the UmweltbundesamtBefore 1998 from the Austrian waste management plan recalculated (including residual waste from administrative facilities)

Landfill gas recoveryNational study

Biodegradable organic carbonNational studies

Oxidation FactorIPCC default value


Methodology for Emission Calculation of „Non Residual Waste“

Model of Marticorena

Mt = M0*e-(kt)

Mt landfill 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 ‚half life‘ of readily or slowly degradable waste respectively

t number of years Readily degradable waste: ‚half life‘ 1-20 years Slowly degradable waste ‚half life‘ 20-100 years Calculation period: 100 years


Sources of Data for the Emission Calculation of „Non Residual Waste“

Activity data1998 to 2003 from the Austrian landfill database managed by the UmweltbundesamtBefore 1998 no data available

Organic carbon content National studies

Half life National studies


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

CH4

[kg/t humid matter]

N2O

[kg/t humid matter]

Mechanical biological treated residual waste

0.6 0.1

Bio-waste, loppings, home composting

0.75 0.1

Sewage Sludge 0.04 0.2


Sources of Data for the Emission Calculation of „Compost production“

Activity dataThe 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 factorsNational studies


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



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 datafor the next submission efforts will be made to update the data



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


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


Improvements in Sector 6 A 1

Improvements Submission 2000

Submission 2004

activity data national studies

landfill database

landfillgas recovery

estimation survey

DOC national study 1999

national study 2004


QA/QC procedures

Involvement of national experts Comparison of national methodology with

IPCC methodology


Final Slide

Thank you for your attention!

Kopenhagen 2-3 Mai 2005 | Folie 1. Kopenhagen 2-3 Mai 2005 | Folie 2 Austrian Inventory of...

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