Annex 2: Worksheets

ANNEX 2

WORKSHEETS

2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories

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Volume 5: Waste

Contents
Annex 2: Worksheets
4D Wastewater Treatment and Discharge
Total Organically Degradable Material in Domestic Wastewater (Updated)........................................... 2.3
Total Organics in Domestic Wastewater by Treatment Discharge Pathway or System (New) ................ 2.4
Organic Component Removed as Sludge from Aerobic Treatment Plants (New) ................................... 2.5
Organic Component Removed as Sludge from Septic Systems (New) .................................................... 2.6
Total Organics in Treated Domestic Wastewater Effluent (New)............................................................ 2.7
CH 4 Emission Factor for Domestic Wastewater ...................................................................................... 2.8
CH 4 Emissions from Domestic Wastewater for Each Income Group and Treatment Discharge Pathway(Updated) ................................................................................................................................................. 2.9
Total CH 4 Emissions from Domestic Wastewater Treatment and Discharge (New) ............................. 2.10
Total Organic Degradable Material in Wastewater for each Industry Sector......................................... 2.11
CH 4 Emission Factor for Industrial Wastewater .................................................................................... 2.12
CH 4 Emissions from Industrial Wastewater .......................................................................................... 2.13
Nitrogen in Domestic Wastewater (New) .............................................................................................. 2.14
Protein Consumed (New) ....................................................................................................................... 2.15
Nitrogen in Effluent from Domestic Wastewater (New)........................................................................ 2.16
N 2 O Emissions from Domestic Wastewater Treatment Plants for each Income Group and Treatment
Discharge Pathway or System (New)..................................................................................................... 2.17
N 2 O Emissions from Domestic Wastewater Effluent (New) ................................................................. 2.18
Nitrogen in Industrial Wastewater (New) .............................................................................................. 2.19
Nitrogen in Effluent from Industrial Wastewater (New)........................................................................ 2.20
N 2 O Emissions from Industrial Wastewater Treatment Plants (New) ................................................... 2.21
N 2 O Emissions from Industrial Wastewater Effluent (New) ................................................................. 2.22

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2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories

Annex 2: Worksheets

SectorCategory
Category Code
Sheet

Waste
Domestic Wastewater Treatment and Discharge
4D1
1 of 8 Estimation of Total Organically Degradable Material in Domestic Wastewater (Updated)
STEP 1

Region or City

A
Population

B
Degradable organic component

C
Organically degradable material in
wastewater

(P)

(BOD)

(TOW)

cap

(kg BOD/cap/yr)

1(kg BOD/yr)
C=AxB

Total
1

g BOD/cap/day x 0.001 x 365 = kg BOD/cap/yr

2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories

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Volume 5: Waste

SectorCategory
Category Code
Sheet

Type oftreatment
or discharge
pathway

Incomegroup

Waste
Domestic Wastewater Treatment and Discharge
4D1
2 of 8 Estimation of Total Organics in Domestic Wastewater by Treatment Discharge Pathway or System (New)A
Organicallydegradable material
in wastewater(TOW)(kg BOD/yr)
Sheet 1 of 8

STEP 1
B
Fraction of population
income group i ininventory year

(U i )(fraction)

C
Degree ofutilization oftreatment/
discharge pathway
or system, j, foreach income groupiD
Correction factor
for industrial BOD
discharged in
sewersE
Total organics in wastewaterby income group andpathway(T ij )
(fraction)(I j )1(TOW ij )(kg BOD/yr)
E=AxBxCxD

Rural
Urban highincomeUrban lowincomeRural
Urban highincomeUrban lowincomeRural
Urban highincomeUrban lowincomeAdd as needed
Total
1

Correction factor for additional industrial BOD discharged into sewers (for collected the default is 1.25, for uncollected the default is 1.00) (see page 6.22 of the 2019 Refinement).

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2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories

Annex 2: Worksheets

SectorCategory
Category Code
Sheet

Type of treatment
or discharge

Waste
Domestic Wastewater Treatment and Discharge
4D1
3 of 8 Estimation of Organic Component Removed as Sludge from Aerobic Treatment Plants (New)A
Amount of sludge removed
from wastewater treatment(S mass )(tonnes sludge/yr)

STEP 1A
B
Sludge factor1(K rem )(kg BOD/kg sludge)

C
Conversion factor of tonnes
into kg

D
Organic component
removed as sludge

1000(S aerobic )(kg BOD/yr)
D=AxBxC

Add as needed
Total
1

See Table 6.6a for default values.

2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories

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Volume 5: Waste

SectorCategory
Category Code

Waste
Domestic Wastewater Treatment and Discharge
4D1
4 of 8 Estimation of Organic Component Removed as Sludge from Septic Systems
Sheet
(New)

Type of treatment
or discharge

A
Total organics inseptic systems(TOW septic )(kg BOD/yr)

STEP 1AB
Fraction of population
managing their septictank in compliance1

C
Faction of organics
removed in sludge2D
Organic component
removed as sludge(F)(fraction)(0.5)(fraction)(S septic )(kg BOD/yr)

Sheet 2 of 8

D=AxBxC

Add as needed
Total

A2.6

1

Default value is 0.5.

2

Default value is 0.5.

2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories

Annex 2: Worksheets

SectorCategory
Category Code
Sheet

Type of treatment
or discharge

Waste
Domestic Wastewater Treatment and Discharge
4D1
5 of 8 Estimation of Total Organics in Treated Domestic Wastewater Effluent (New)A
Organicallydegradable material in
wastewater(TOW)(kg BOD/yr)

STEP 1B
B
Fraction ofwastewater treatedexclusively by eachwastewater treatment
type j1(T j )(fraction)

C
Faction of organics
removed in sludge2

D
Total organics intreated domestic
wastewater effluent(TOW REM,j )(fraction)(TOW EFFtreat )(kg BOD/yr)

Sheet 1 of 8

D = A x B x (1 – C)

Add as needed
Total
1

See Table 6.5.

2

See Table 6.6b.

2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories

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Volume 5: Waste

SectorCategory
Category Code
Sheet

Waste
Domestic Wastewater Treatment and Discharge
4D1
6 of 8 Estimation of CH4 Emission Factor for Domestic Wastewater
STEP 2Type of treatment
or dischargeA
Maximum methane
producing capacity

B
Methane correction factor foreach treatment system

C
Emission factor(B o )(MCF j )(EF j )(kg CH 4 /kgBOD)(kg CH 4 /kg BOD)
C=AxB

Add as needed

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2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories

Annex 2: Worksheets

SectorCategory
Category Code

Waste
Domestic Wastewater Treatment and Discharge
4D1
7 of 8 Estimation of CH4 Emissions from Domestic Wastewater for Each Income Group and
Sheet
Treatment Discharge Pathway (Updated)

Type oftreatment ordischarge
pathway

Income group

STEP 3
B
Sludge removed

C
Emission Factor

D
Methanerecovered andflaredE
Net methane
emissions(TOW j )(S j )1(EF j )

(R j )(CH 4 )

(kg BOD/yr)(kg BOD/yr)(kg CH 4 /kg BOD)

(kg CH 4 /yr)

(kg CH 4 /yr)

Sheet 2 of 8

Sheet 3 and 4 of 8

Sheet 6 of 8

A
Total organics inwastewater byincome group andpathway

E = [(A - B) x C - D]

RuralUrban high income
Urban low income
Rural
Urban high income
Urban low income
Rural
Urban high income
Urban low income
Add as needed
Total
1

Default value is zero for systems other than centralized aerobic treatment systems or septic systems.

2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories

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Volume 5: Waste

SectorCategory
Category Code
Sheet
A
Total methane emissions(CH 4 )(kg CH 4 /yr)
Sheet 7 of 8

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Waste
Domestic Wastewater Treatment and Discharge
4D1
8 of 8 Estimation of Total CH4 Emissions from Domestic Wastewater Treatment and Discharge (New)
STEP 3B
Conversion factor of kg into Gg

10-6

C
Total methane emissions(CH 4 )(Gg CH 4 /yr)
C=AxB

2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories

Annex 2: Worksheets

SectorCategory
Category Code
Sheet

Waste
Industrial Wastewater Treatment and Discharge
4D2
1 of 3 Total Organic Degradable Material in Wastewater for each Industry Sector
STEP 1

Industry Sectors

A

B

C

D

Total industry
product

Wastewater
generated

Chemical Oxygen
DemandTotal organic degradable material in
wastewater for each industry sector(P i )(W i )(COD i )(TOW i )(t product /yr)

(m3/t product )(kg COD/m3)(kg COD/yr)
D=AxBxC

Industrial sector 1
Industrial sector 2
Industrial sector 3

add as needed
Total2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories

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Volume 5: Waste

SectorCategory
Category Code
Sheet

Type of treatment ordischarge

Waste
Industrial Wastewater Treatment and Discharge
4D2
2 of 3 Estimation of CH4 Emission Factor for Industrial Wastewater
STEP 2A
B
C
Maximum Methane
Methane Correction Factor for
Emission Factor
Producing Capacity
the Treatment System(B 0 )(kg CH 4 /kg COD)

(MCF j )(EF j )(kg CH 4 /kg COD)
C=AxB

add as needed

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2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories

Annex 2: Worksheets

SectorCategory
Category Code
Sheet

Waste
Industrial Wastewater Treatment and Discharge
4D2
3 of 3 Estimation of CH4 Emissions from Industrial Wastewater
STEP 3

Industrial sector

Type oftreatment ordischarge
pathwayA
Total organic
degradable
material in
wastewater foreach industry
sectorB
Sludgeremoved ineach industry
sectorC
Emission factor
for eachtreatment
systemD
Recovered CH 4 ineach industry
sector(TOW i )(S i )(EF i )(kg CH 4 /kg
COD)(R i )(kg COD/yr)(kg COD/yr)

Sheet 1 of 3

(kg CH 4 /yr)E
Conversion factorof kg into Gg

FNet methane
emissions(CH 4 )
10-6

(kg CH 4 /yr)
F = [[(A – B) x C] – D]xE

Sheet 2 of 3

Industrial sector 1
Industrial sector 2
Industrial sector 3

add as needed
Total2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories

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Volume 5: Waste

SectorCategory
Category Code
Sheet

Type of treatment
or discharge
pathway

Waste
Domestic Wastewater Treatment and Discharge
4D1
1 of 5 Estimation of Nitrogen in Domestic Wastewater (New)
STEP 1A
B
C
D
Population
Per capita
Fraction of
Additional
served by theproteinnitrogen innitrogen fromtreatment
consumption
proteinhouseholdpathway, j
products1(P treatment )(people/year)(Protein)(kg/person/
year)(F NPR )(kg N/kg
protein)E
Fraction of nonconsumed
protein andadditional
nitrogen fromhouseholdproducts

F
Fraction ofindustrial andcommercial codischarged
proteinG
Total nitrogen in domestic
wastewater (treated) bytreatment pathway

N HH(F NON-CON )(F IND-COM )(TN DOM_j )(fraction)

(-)

(-)

(kg N/year)
G = (A x B x C x D x E x F)

Add as needed
Total
1

Default value is 1.1.

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2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories

Annex 2: Worksheets

SectorCategory
Category Code
Sheet
A

Waste
Domestic Wastewater Treatment and Discharge
4D1
2 of 5 Estimation of Protein Consumed (New)
STEP 1B
C

Annual per capita protein supply Fraction of protein consumed(Protein SUPPLY )(kg protein/person/year)(FPC)(fraction)

Protein consumed(Protein)(kg protein/person/year)
C = (A x B)

Total

2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories

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Volume 5: Waste

SectorCategory
Category Code
Sheet

Type of treatment
or discharge
pathway

Waste
Domestic Wastewater Treatment and Discharge
4D1
3 of 5 Estimation of Nitrogen in Effluent from Domestic Wastewater (New)
STEP 1A
B
C
D
Total nitrogen in
Fraction of
Fraction of total
Total nitrogen in effluent
domestic wastewater
wastewater treatedwastewater nitrogen
exclusively by eachremoved during
wastewater treatment
wastewatertype jtreatment per
treatment type j(TN DOM )(kg N/year)
Sheet 1 of 4

(T j )(fraction)(N REM,j )(-)(N EFFLUENT,DOM )(kg N/year)
D = [A x (B x (1 - C))]

Add as needed
Total

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2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories

Annex 2: Worksheets

SectorCategory
Category Code
Sheet

Incomegroup

Type oftreatment ordischarge
pathway

Waste
Domestic Wastewater Treatment and Discharge
4D1
4 of 5 Estimation of N2O Emissions from Domestic Wastewater Treatment Plants for each Income Group andTreatment Discharge Pathway or System (New)
STEP 3C
Emission factor fortreatment/discharge
pathway or system,jD
Total nitrogen indomestic
wastewater(treated)E
Conversion factorof kg N 2 O-N into
kg N 2 O

F
N 2 O emissions fromdomestic
wastewater treatment
plants in inventory
year

44/28

(N 2 O Plants DOM )AFraction of
population inincome group i
in inventory year

B
Degree of utilisationof treatment/
discharge pathway
or system, j, foreach income group,i(U i )(T ij )

(EF j )(TN DOM )(fraction)(fraction)(kg N 2 O-N/kg N)(kg N/year)(kg N 2 O/yr)

Sheet 1 of 4

F=AxBxCxDxE

Rural

Urban highincomeUrban lowincomeTotal

2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories

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Volume 5: Waste

SectorCategory
Category Code
Sheet

Type of treatment
or discharge
pathway

Waste
Domestic Wastewater Treatment and Discharge
4D1
5 of 5 Estimation of N2O Emissions from Domestic Wastewater Effluent (New)A
Nitrogen in effluent(N EFFLUENT,DOM )STEP 4
B
Emission factor(EF EFFLUENT )C
Conversion factor of
kg N 2 O-N into kg N 2 O

DTotal N 2 O emissions(kg N/year)(kg N 2 O-N/kg N)

44/28(kg N 2 O/year)

Sheet 3 of 5

See Table 6.8a
(New)

D=AxBxC

Total

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2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories

Annex 2: Worksheets

SectorCategory
Category Code
Sheet

Industry Sectors

Waste
Industrial Wastewater Treatment and Discharge
4D2
1 of 4 Estimation of Nitrogen in Industrial Wastewater (New)
STEP 1A
B
C
D
Total industry
Wastewater
Total nitrogen
Total nitrogen in industrial
product
generated
wastewater (treated)(P i )(t product /yr)

(W i )
3(m /t product )(TN i )(TN INDi )3(kg N/m )(kg N/year)
D = (A x B x C)

Industrial sector 1
Industrial sector 2
Industrial sector 3

Add as needed
Total2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories

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Volume 5: Waste

SectorCategory
Category Code
Sheet

Type of treatment
or discharge
pathway

Waste
Industrial Wastewater Treatment and Discharge
4D2
2 of 4 Estimation of Nitrogen in Effluent from Industrial Wastewater (New)
STEP 1A
B
C
D
Total nitrogen
Fraction of
Fraction of total
Total nitrogen in effluent
in industrial
wastewater
wastewater nitrogenwastewater
treatedremoved during
exclusively by
wastewatereach wastewater
treatment per
treatment type jtreatment type j(TN INDi )(kg N/year)
Sheet 1 of 4

(T j )(fraction)(N REM,j )(-)(N EFFLUENT,IND )(kg N/year)
D = [A x (B x (1 - C))]

Add as needed
Total

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2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories

Annex 2: Worksheets

SectorCategory
Category Code
Sheet

Waste
Industrial Wastewater Treatment and Discharge
4D2
3 of 4 Estimation of N2O Emissions from Industrial Wastewater Treatment Plants (New)
STEP 3

Type of treatment

A
Degree of utilisation oftreatment/discharge
pathway or system, j,
for each industry, i

B
Emission factor fortreatment/discharge
pathway or system, jCNitrogen in wastewaterfrom industry, i(treated)(T i.j )(EF j )(TN INDi )(fraction)(kg N 2 O-N/kg N)(kg N/year)

D
Conversion factor of
kg N 2 O-N into kg N 2 O

E
N 2 O emissions fromindustrial wastewater
treatment plants ininventory year
(N 2 O Plants IND )(kg N 2 O/year)

44/28

Sheet 1 of 4

E = (A x B x C x D)

Industrial sector 1
Industrial sector 2
Industrial sector 3

Add as needed
Total2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories

A2.21

Volume 5: Waste

SectorCategory
Category Code
Sheet

Type of treatment
or discharge
pathway

Waste
Industrial Wastewater Treatment and Discharge
4D2
4 of 4 Estimation of N2O Emissions from Industrial Wastewater Effluent (New)A
Nitrogen in effluent

STEP 4
B
Emission factor(N EFFLUENT,IND )(kg N/year)
Sheet 2 of 4

(EF EFFLUENT )(kg N 2 O-N/kg N)
See Table 6.8aCConversion factor of
kg N 2 O-N into kg N 2 O
44/28

D
Total N 2 O emissions
from industrial
wastewater effluent(N 2 OEffluent IND )(kg N 2 O/year)
D=AxBxC

Add as needed
Total

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2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories