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6.4

Methane from Industrial Wastewaterand Sludge Streams
Use WORKSHEET 6-3 METHANE EMISSIONS FROM INDUSTRIAL WASTEWATER AND
SLUDGE HANDLING to enter data for this submodule.

STEP 1 ESTIMATING TOTAL ORGANICWASTEWATER AND SLUDGE
1 Enter Total Industrial Output for each industry in column A, in tonnes
per year.

USING THE WORKSHEET•

Copy the Worksheet at theend of this section to complete
the inventory.

•Keep the original of theworksheet blank so you canmake
furthercopies
ifnecessary.

2 Enter the Degradable Organic Component in kg COD/m3 wastewater incolumn B. Default values are provided in Table 6-6.
3 Enter the Wastewater Produced per unit product by industry in
m3/tonnes of product in column C.
4 Enter the Fraction of Degradable Organic Component Removed as
Sludge in column D. The default fraction is zero.
5 Multiply the values in columns A, B, C, and one minus the value incolumn D. Enter the product in column E. This is the Total Organic
Wastewater from Industrial Source.
6 Multiply the values in columns A, B, C, and D. Enter the product incolumn F. This is the Total Organic Sludge from Industrial Source.

STEP 2 ESTIMATE EMISSION FACTORS FOR
INDUSTRIAL WASTEWATER HANDLINGSYSTEMS
Determine the Aggregate MCF for the industrial wastewater stream.
1 Enter the name of the industrial wastewater source on the ‘Source’ line.
2 In column A, enter the types of Wastewater Handling Systems used forthe selected wastewater source.
3 In column B, enter the Fraction of Wastewater Treated by the Handling
System in column A.
4 In column C, enter the Methane Conversion Factor for the Handling
System in column A.
5 Multiply the values in columns B and C. Enter the Product in column D.
6 Enter the sum of the products in the bottom of column D.
7 Enter the Maximum Methane Producing Capacity for the wastewater inthe bottom of column E. The default (theoretical) value for Bo is 0.25 kg
CH4/kg BOD.
8 Calculate the average Emission Factor for the Industrial Wastewater
Source by multiplying the value in the bottom of column D by the value
in the bottom of column E. Enter the product in the bottom ofcolumn F.

Revised 1996 IPCC Guidelines for National Greenhouse Gas Inventories:

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6 . 21

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STEP 3 ESTIMATE EMISSION FACTORS FOR
INDUSTRIAL SLUDGE HANDLING SYSTEMS
Determine the Aggregate MCF for the industrial sludge stream.
1 Enter the name of the industrial sludge source on the ‘Source’ line.
2 In column A, enter the types of Sludge Handling System used for theselected sludge source.
3 In column B, enter the Fraction of Sludge Treated by the handlingsystem in column A.
4 In column C, enter the Methane Conversion Factor for the handlingsystem in column A.
5 Multiply the values in columns B and C. Enter the Product in column D.
6 Enter the sum of the products in the bottom of column D.
7 Enter the Maximum Methane Producing Capacity for the sludge in thebottom of column E. The default (theoretical) value for Bo is 0.25 kg
CH4/kg BOD.
8 Calculate the average Emission Factor for the Industrial Sludge Sourceby multiplying the value in the bottom of column D by the value in thebottom of column E. Enter the product in the bottom of column F.

STEP 4 ESTIMATE METHANE EMISSIONSFROM INDUSTRIAL WASTEWATER AND
SLUDGE
1 In column A, rows 1 and 2, copy the Total Organic Wastewater from
Industrial Source value from column E of Worksheet 6-3, Sheet 1, andthe Total Organic Sludge from Industrial Source value from column F ofWorksheet 6-3, Sheet 1.
2 In column B, copy the average Emission Factor for Industrial
Wastewater value from column F of Worksheet 6-3, Sheet 2 and theaverage Emission Factor for Industrial Sludge Source from column F ofWorksheet 6-3, Sheet 3.
3 Multiply the values of columns A and B. Enter the product in column C.
4 Enter the total amount of Methane Recovered and/or Flared from theindustrial wastewater and sludge source in column D in kg CH4. If nodata are available, the default is zero.
5 Subtract the value in column D from the product in column C. Multiplyby 10-6 to convert emissions to gigagrams. Enter the difference incolumn E. Sum the values in both rows of column E at the bottom ofthe column. This is the Net CH4 Emissions from the selected industrial
wastewater and sludge source.

6 . 22

Revised 1996 IPCC Guidelines for National Greenhouse Gas Inventories:

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6.5

Nitrous Oxide from Human Sewage
ESTIMATE
INDIRECTNITROUSEMISSIONS FROM HUMAN SEWAGE

OXIDEUse WORKSHEET 6-4 INDIRECT NITROUS OXIDE EMISSIONS FROM HUMAN
SEWAGE to enter date for this submodule.
1 In column A, enter, average annual Per Capita Protein Consumption inthe country (Protein in kg/person/yr).
2 In column B, enter the Population in country (number)(where numberequals NRPEOPLE).
3 In column C, enter the Fraction of Nitrogen in Protein (FracNPR). Thedefault value is 0.16 kg N/kg protein. (Table 4-19 in Agriculture
Chapter.)
4 In column D, enter the Emission Factor, EF6. The default factor is 0.01
kg N2O-N/kg sewage-N produced. (Table 4-18 in Agriculture Chapter.)
5 Multiply the values in columns A, B, C and D, and then multiply by theconversion ratio 44/28 and by 10-6 to convert to gigagrams. Enter theproduct in column E. This value is the Total Annual N2O Emissions fromhuman sewage.
For a detailed description of this methodology see Section 4.5.4 of theReference Manual.

Revised 1996 IPCC Guidelines for National Greenhouse Gas Inventories:

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6 . 23

B

MethaneCorrection
Factor(MCF)

ATotalAnnualMSW
Disposed toSWDSs(Gg MSW)

Fraction ofDOC inMSWCFraction ofDOC which
Actually
DegradesDConversion
Ratio

16/12

FE
Fraction ofCarbon
Released as
Methane

STEP 3Re v i s e d 1 9 9 6 I P C C G u i d e l i n e s f o r N a t i o n a l G r e e n h o u s e G a s I n v e n t o r i e s :STEP 2

1 OF 1

6-1

WORKSHEETSHEETMETHANE EMISSIONS FROM SOLID WASTE DISPOSAL SITESWASTESUBMODULE

MODULE

STEP 16

H= (B x G)

G= (C x D x E x F)

Workbook

Realised(Countryspecific)
MethaneGeneration
Rate per Unitof Waste(Gg CH4/Gg MSW)

H

Potential Methane
Generation Rateper Unit of Waste(Gg CH4/Gg MSW)GJ= (H x A)

GrossAnnual
MethaneGeneration(Gg CH4)

J
Recovered
Methaneper Year
(Gg CH4)K

L= (J - K)

Net Annual
MethaneGeneration(Gg CH4)

L

STEP 4

One Minus
MethaneOxidation
Correction
FactorM

6 . 25

N= (L x M)

Net Annual
MethaneEmissions(Gg CH4)NWASTE

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MODULESUBMODULE

WASTE
QUANTITY OF MSW DISPOSED OF IN SOLID WASTE DISPOSAL SITESUSING COUNTRY DATAWORKSHEETSHEET

6-1A (SUPPLEMENTAL)
1 OF 1ABCDE

Population whose
Waste goes toSWDSs(Urban or Total)(persons)

MSW GenerationRate(kg/capita/day)

Annual Amount ofMSW Generated(Gg MSW)

Fraction of MSW
Disposed toSWDSs (Urban orTotal)

Total Annual MSW
Disposed to SWDSs(Gg MSW)C = (A x B x 365)/106

6 . 26E = (C x D)

Revised 1996 IPCC Guidelines for National Greenhouse Gas Inventories:Workbook

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MODULESUBMODULE

WASTE
QUANTITY OF MSW DISPOSED OF IN SOLID WASTEDISPOSAL SITES USING DISPOSAL RATE DEFAULTDATAWORKSHEETSHEET

6-1B (SUPPLEMENTAL)
1 OF 1A

BC

Population whose Waste goes to
SWDSs (Urban or Total)(persons)

MSW Disposal Rate toSWDSs(kg/capita/day)Total Annual MSW
Disposed to SWDSs(Gg MSW)C = (A x B x 365)/106

Revised 1996 IPCC Guidelines for National Greenhouse Gas Inventories:

Workbook

6 . 27

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MODULESUBMODULEMETHANE CORRECTION FACTOR

WORKSHEET

6-1C (SUPPLEMENTAL)SHEETType of Site

WASTE

1 OF 1W

XY

Proportion of Waste(by weight) for EachType of SWDSs

MethaneCorrection Factor(MCF)Weighted Average
MCF for Each Typeof SWDS
Y=WxX

6 . 28

Managed1.0

Unmanaged - deep(≥ 5m waste)

0.8

Unmanaged-shallow(< 5m waste)

0.4Total

0.6

Revised 1996 IPCC Guidelines for National Greenhouse Gas Inventories:

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MODULE WASTESUBMODULE METHANE EMISSIONS FROM DOMESTIC AND COMMERCIAL WASTEWATER AND SLUDGE
TREATMENTWORKSHEET 6- 2SHEET 1 OF 4 ESTIMATION OF ORGANIC WASTEWATER AND SLUDGESTEP 1ABC

DRegion or City

Population(1,000 persons)Degradable
Organic
Component(kg BOD/1000persons/yr)

Fraction ofDegradableOrganic
Component
Removed as
Sludge

EF

Total
Total
Domestic/Commercial Domestic/Commercial
Organic Wastewater
Organic Sludge(kg BOD/yr)(kg BOD/yr)

E = [B x C x (1-D)]

F = (B x C x D)

Total:

Revised 1996 IPCC Guidelines for National Greenhouse Gas Inventories:

Workbook

6 . 29

WASTE

MODULE WASTESUBMODULE METHANE EMISSIONS FROM DOMESTIC AND COMMERCIAL WASTEWATER TREATMENT
WORKSHEET 6- 2SHEET 2 OF 4 ESTIMATION OF EMISSION FACTOR FOR WASTEWATER HANDLING SYSTEMSSTEP 2A

BCDEF

Wastewater
HandlingSystem

Fraction ofWastewater
Treated by theHandling
SystemMethane
Conversion
Factor for theHandling
SystemProductMaximum
MethaneProducing
Capacity(kg CH4/kg BOD

Emission Factor for
Domestic/Commercial
Wastewater

D = (B x C)

(kg CH4/kg BOD)

F = (D x E)

Aggregate
MCF:

6 . 30

Revised 1996 IPCC Guidelines for National Greenhouse Gas Inventories:

Workbook

6WASTE

MODULE WASTESUBMODULE METHANE EMISSIONS FROM DOMESTIC AND COMMERCIAL WASTEWATER TREATMENT
WORKSHEET 6- 2SHEET 3 OF 4 ESTIMATION OF EMISSION FACTOR FOR SLUDGE HANDLING SYSTEMSSTEP 3ASludge
Handling
SystemBCFraction ofMethane
SludgeConversion
Treated by the Factor for theHandling
Handling
SystemSystem

DEFProduct

Maximum Methane
Producing Capacity(kg CH4/kg BOD)

Emission Factor for
Domestic/
Commercial Sludge(kg CH4/kg BOD)

D = (B x C)

F = (D x E)

Aggregate
MCF:

Revised 1996 IPCC Guidelines for National Greenhouse Gas Inventories:

Workbook

6 . 31

WASTE

MODULE WASTESUBMODULE METHANE EMISSIONS FROM DOMESTIC AND COMMERCIAL WASTEWATER AND SLUDGE TREATMENT
WORKSHEET 6- 2SHEET 4 OF 4 ESTIMATION OF METHANE EMISSIONS FROM DOMESTIC/COMMERCIAL WASTEWATER ANDSLUDGESTEP 4ABCDE

Total OrganicProduct(kg BOD/yr)

Emission Factor(kg CH4/kg BOD)

MethaneEmissionsWithout
Recovery/Flaring

MethaneRecoveredand/or Flared(kg CH4)

Net Methane
Emissions(Gg CH4)

from Worksheet
6-2, Sheet 1

from Worksheet
6-2, Sheets 2 and 3

C = (A x B)

E = (C - D) x 10-6

Wastewater
SludgeTotal:

6 . 32

Revised 1996 IPCC Guidelines for National Greenhouse Gas Inventories:

Workbook

6WASTE

MODULE WASTESUBMODULEMETHANE EMISSIONS FROM INDUSTRIAL WASTEWATER AND SLUDGE HANDLINGWORKSHEET

6-3SHEET

1 OF 4 TOTAL ORGANIC WASTEWATER AND SLUDGESTEP 1A

BCDEF

TotalIndustrial
Output(t/yr)

Degradable
Organic
Component(kg COD/m3

Wastewater
Produced(m3/tonneproduct)

Fraction of
Degradable
Organic
Component
Removed asSludge

Total Organic
Wastewater fromIndustrial Source(kg COD/yr)

Total Organic Sludge
from Industrial Source(kg COD/yr)

wastewater)

E = [A x B x C x(1-D)]

F = (A x B x C x D)

Iron and SteelNon-ferrous metals
Fertiliser
Food &Beverage

Canneries
BeerWine
Meatpacking
Dairy products
Sugar
Fish processing
Oil & grease
CoffeeSoft drinks
Other

Paper & Pulp

PaperPulp
Other

Petroleumrefining/Petrochemicals
Bleaching
Dying
Other
Rubber
Other
Total

Revised 1996 IPCC Guidelines for National Greenhouse Gas Inventories:

Workbook

6 . 33

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MODULE WASTESUBMODULE METHANE EMISSIONS FROM INDUSTRIAL WASTEWATER TREATMENTSOURCEWORKSHEET 6- 3SHEET 2 OF 4 ESTIMATION OF EMISSION FACTOR FOR WASTEWATER HANDLING SYSTEMSSTEP 2A

BC

DE

F

Wastewater
Handling System

Fraction ofWastewater
Treated by theHandling
SystemMethaneConversion
Factor(MCF)

ProductMaximum
MethaneProducing
Capacity(kg CH4/kg BOD)

Emission Factor for
Industrial Wastewater
Source(kg CH4/kg BOD)

D = (B x C)

F = (D x E)

Aggregate
MCF:

6 . 34

Revised 1996 IPCC Guidelines for National Greenhouse Gas Inventories:

Workbook

6WASTE

MODULE WASTESUBMODULE METHANE EMISSIONS FROM INDUSTRIAL WASTEWATER TREATMENTSOURCEWORKSHEET 6- 3SHEET 3 OF 4 ESTIMATION OF EMISSION FACTOR FOR SLUDGE HANDLING SYSTEMSSTEP 3A

BC

DE

F

Sludge Handling
SystemFraction ofSludge
Treated bythe Handling
SystemMethaneConversion
Factor(MCF)

ProductMaximumMethane
Producing
Capacity(kg CH4/kgCOD)

Emission Factor for
Industrial Sludge
Source(kg CH4/kg COD)

D = (B x C)

F = (D x E)

Aggregate
MCF:

Revised 1996 IPCC Guidelines for National Greenhouse Gas Inventories:

Workbook

6 . 35

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MODULE WASTESUBMODULE METHANE EMISSIONS FROM INDUSTRIAL WASTEWATER AND SLUDGE TREATMENTWORKSHEET 6- 3SHEET 4 OF 4 ESTIMATION OF METHANE EMISSIONS FROM INDUSTRIAL WASTEWATER AND
SLUDGE
STEP 4ABC

DE

Total OrganicProduct(kg BOD/yr)

Emission Factor(kg CH4/kg BOD)

MethaneEmissions withoutRecovery/FlaringMethane
Recovered
and/or Flared(kg CH4)

Net Methane
Emissions(Gg CH4)

Worksheet 6-3,
Sheet 1

Worksheets 6-3,
Sheets 2 and 3

C = ( A x B)

E = (C - D) x
10-6

Wastewater
SludgeTotal:

6 . 36

Revised 1996 IPCC Guidelines for National Greenhouse Gas Inventories:

Workbook

6

WASTE

MODULEWASTE

SUBMODULE

INDIRECT NITROUS OXIDE EMISSIONS FROM HUMAN SEWAGE

WORKSHEET

6-4

SHEET

1 OF 1ABCDEPer Capita Protein
Consumption(Protein inkg/person/yr)

Population(number)

Fraction of
Nitrogen inProtein FracNPR(kg N/kg protein)

Emission factor
EF6 (kg N2ON/kg sewage-N
produced)

Total Annual
N2O Emissions(Gg N2O/yr)
E = (A x B x C x D) x
44/28 x 10-6

Total

Revised 1996 IPCC Guidelines for National Greenhouse Gas Inventories:

Workbook

6 . 37