2019 Refinement to the 2006 IPCC Guidelines:Refinements in Volume 5 (Waste)
Bonn Climate Change Conference (SB50)
SBSTA - IPCC Special Event on 2019 Refinement to the 2006 IPCC Guidelines
21 June 2019, Bonn, Germany
Baasansuren Jamsranjav
IPCC TFI TSUOutline
Overview
Major refinements
Summary

Overview• Refinements are made in the following chapters:

Chapter 2: Waste generation, composition and management data
Chapter 3: Solid waste disposal
Chapter 5: Incineration and open burning of waste
Chapter 6: Wastewater treatment and discharge• Volume 5 contains annexes:

Annex 1 (Mapping tables)
Annex 2 (Worksheets)• IPCC Waste Model for estimation of methane (CH4) emissions from solid
waste disposal site (SWDS) has been updated reflecting the refinements
made in relevant chapters.
• The refinements are made to include new and updated default data as
well as new and up-to-date information and guidance, among others.

Chapter 2: Waste generation, composition andmanagement data
• Updated and new default data on waste generation and treatment e.g.,
new data on municipal solid waste (MSW) open dumped (updated Table2.1 and updated Annex 2A.1)• Updated and new default data on MSW composition e.g., new data on
garden waste and nappies (updated Table 2.3 and new Annex 2A.2)• New default data on carbon (C) and nitrogen (N) content in domestic
and industrial sludge (new Table 2.4a)• New and updated default data on degradable organic carbon (DOC)
content in domestic and industrial sludge (new Table 2.4a)• Updated/elaborated guidance on sludge e.g., definition of sludge; DOCof sludge (Section 2.3.2)

Chapter 3: Solid waste disposal• New types of managed SWDS and respective default methanecorrection factors (MCF) (updated Table 3.1)

Managed poorly–semi-aerobic
Managed well–active aeration
Managed poorly–active aeration

Chapter 3: Solid waste disposal• New default data on fraction of degradable organic carbon which
decomposes (DOCf) by type of waste (new Table 3.0):

Less decomposable (e.g., wood, tree branches)
Moderately decomposable (e.g., paper, textile, nappies)
Highly decomposable (e.g., food waste, grasses)• Appendices provide information as basis for future methodologicaldevelopment:

Information on nitrous oxide (N2O) emissions from SWDS (Appendix 3A.1)
Information on estimation of CH4 emissions from SWDS managed by active
aeration using locally available measured data (Appendix 3A.2)

Chapter 5: Incineration and open burning of waste• New technologies of thermal treatment of waste: pyrolysis, gasificationand plasma (Section 5.1)
• New default emission factors for CH4 and N2O emissions from combined
systems of pyrolysis-melting and gasification-melting (new Tables 5.3aand 5.4a)• Updated default oxidation factor for opening burning of MSW (updatedTable 5.2)

Chapter 6: Wastewater treatment and discharge
The chapter has been substantially refined:• Updated and elaborated guidanceIntroduction (Section 6.1)
CH4 emissions from wastewater (Section 6.2)N2O emissions from domestic wastewater (Section 6.3)

• New guidanceN2O emissions from industrial wastewater (Section 6.4)

• New and updated default data
• Annexes (Annex 6A.1- 6A.7) provide additional details related to new or
updated default data
• Information on non-biogenic CO2 emissions from wastewater treatment
as basis for future methodological development (Appendix 6A.1)

Chapter 6: Wastewater treatment and discharge
Introduction (Section 6.1)
 Figure 6.1 has been updated and simplified to show different pathways
for wastewater treatment and discharge New subsections have been added to discuss
Centralized treatment systems (Section 6.1.1)
Decentralized treatment systems of domestic wastewater (onsitesanitation) (Section 6.1.2)
 Emissions from receiving waters (Section 6.1.3)
Chapter 6: Wastewater treatment and discharge
CH4 emissions from wastewater (Section 6.2)
 Certain MCFs for domestic and industrial wastewater treatment anddischarge have been updated (e.g., septic systems; centralizedwastewater treatment plants; discharge to aquatic environments)

There are no longer separate MCFs for “well managed” and “not wellmanaged” centralized aerobic treatment systems

New Tier 2 MCFs/emission factors for wastewater discharged to aquaticenvironments (discharge to reservoirs, lakes and estuaries; discharge toaquatic environments other than reservoirs, lakes and estuaries)
New guidance on the calculation of organic component removed assludgeChapter 6: Wastewater treatment and discharge
N2O emissions from domestic wastewater (Section 6.3)
 Updated guidance on estimation of N2O emissions from wastewater
treatment plants
 Updated and new emission factors for discharges to aquaticenvironments
 Updated emission factor for wastewater treatment plants
 New emission factor for septic systems

Chapter 6: Wastewater treatment and discharge
N2O emissions from industrial wastewater (new Section 6.4)
 New guidance (no methodology in the 2006 IPCC Guidelines)Emissions from industrial wastewater treatment plants
Emissions from industrial wastewater effluent discharged to aquaticenvironments

Summary
Volume 5 of the 2019 Refinement provides:• Updated and elaborated guidance (e.g., new types of managed solid
waste disposal sites; CH4 and N2O emissions from gasification andpyrolysis of waste; CH4 and N2O emissions from wastewater)

Better understanding of emissions/sources and more clearer guidance (e.g.,clarification to the existing guidance)• New guidance (e.g., N2O emissions from industrial wastewater)Improved completeness• New and updated default data (e.g., waste generation and composition;
parameters of domestic and industrial sludge; CH4 and N2O emissions
from domestic and industrial wastewater treatment and discharge)
Improved accuracy

Thank you
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