Electricity from biogas {AU}| pig production | AusLCI, U
Unit process Australia v00.00.000
This dataset represents the annual production of liveweight pig in Australia. Information relative to direct emissions of methane and dinitrogen oxide from enteric fermenetation and manure management systems was calculated from data and formula reported in the Australian National Inventory Report. Energy consumption and other inputs and outputs at piggeries were modelled based on information sourced from the literature, and representative of 70% of the herd of sows. This data is built using information reported in Copley et al. (2024), Wiedemann et al. (2016) and National Inventory Report (2024). It was developed as part of the LCAgMetrics project, a partnership between Agrifutures Australia and Lifecycles, funded by the Australian Government's Sustainability Reporting Uplift Grant as part of the National Agriculture Traceability Grants Program. Documentation for this dataset can be found in the 'LCAgMetrics Methodology for developing Life Cycle Inventory' report, available at https://agrifutures.com.au/ Reference flow: Herd operaton over one year Production Volumes: 106797 tonnes/year Activities included: all activities taking place at the piggery. This activity ends at the piggery gate, with pigs ready for delivery at the abattoir. Energy values: Unknown Nutritional values: Unknown Geography: Australia Technology level: Current Time period: 2020-2025 Record: Paul-Antoine Bontinck; Tel: +61(0)3 9417 1190; email: office@lifecycles.com.au; company: Life Cycle Strategies; Country: AU Generator: Paul-Antoine Bontinck; Tel: +61(0)3 9417 1190; email: office@lifecycles.com.au; company: Life Cycle Strategies; Country: AU
- Sector
- Energy
- Contributor
- —
- Last updated
- 23 Nov 2024
- Reference ID
262209f7-108f-3198-82ab-93fb8567384d
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Documentation
- Quantitative reference
- Electricity from biogas {AU}| pig production | AusLCI, U
- Sampling procedure
- Secondary data based on survey of a representative sample of the industry associated with National Inventory Report data and method.
- Creation date
- 23 Nov 2024
- Is copyright protected
- No
- Is infrastructure process
- No
- Tags
- energy
- Sources
-
National Greenhouse Gas Inventory/2024/Commonwealth of Australia
Environmental impacts of Australian pork in 2020 and 2022/2024/Copley M. A.
Environmental impacts and resource use from Australian pork: GHG/2016/Wiedemann
Envt. impacts and resource use from AU pork: Energy, water, land/2016/Wiedemann
Product outputs
| Flow | Amount | Unit | Comment |
|---|---|---|---|
| Electricity from biogas {AU}| pig production | AusLCI, U | 33415419.291588034 | MJ | — |
Technical inputs
| Flow | Amount | Unit | Comment |
|---|---|---|---|
| Carbon correction factor {AU}| | AusLCI, U | 0.0 | kg | Allocation correction for electricity from biogas. |
| Electricity from biogas , biogenic C not balanced {AU}| pig production | AusLCI, U | 33415419.291588034 | MJ | — |
Parameters
| Name | Value | Formula | Description |
|---|---|---|---|
| CH4_enteric | 980196.3860643634 | CH4_enteric_sows+CH4_enteric_boars+CH4_enteric_gilts+CH4_enteric_slaughter_pigs | [kg CH4/year] total enteric emissions of herd |
| national_herd_gilts | 39300.0 | — | (1,2,2,1,1,na) [head] National herd statistics from Table A.5.5.5.10 of Australian Government (2024) National Inventory Report 2022, Volume 2. |
| CH4_animal_waste_boars | 11642.757042800575 | boars_CH4_animal_waste*boars | [kg CH4/year] total methane emissions from manure management of boars |
| N2O_leaching_slaughter_pigs | — | slaughter_pigs_N2O_leaching*slaughter_pigs*(slaughter_pig_age/365) | [kg CH4/year] total dinitrogen monoxide emissions from leaching associated with manure management of slaughter pigs |
| gilts | 7502.37 | national_herd_gilts*covered_pond_FR | [head] estimated number of heads |
| gilts_N2O_leaching | — | E_gilts*Frac_drylot*FracWET*FracLEACH_MS*EF_LEACH*NtoN2O | [kg/head/year] Equation 3B.5c_3 and 3B.5c_4 of Australian Government (2024) National Inventory Report 2022, Volume 1 |
| moisture_loss | 0.04 | — | (2,na,2,1,1,na) As reported in Wiedemann and Yan (2014) |
| energy_renewable_consumed_total | 81063688.64454988 | energy_renewable_consumed*total_liveweight/1000 | [MJ/year] |
| DM_livepigs | 0.3 | — | [kg dry mass/kg wet mass] |
| FracLEACH_MS | 0.22 | — | (1,2,2,1,1,na) [kg N/kg applied] Fraction of N lost through leaching and runoff, Equation 3.B.5c_3, Australian Government (2024) National Inventory Report 2022, Volume 1. |
| boars_N2O_leaching | — | E_boars*Frac_drylot*FracWET*FracLEACH_MS*EF_LEACH*NtoN2O | [kg/head/year] Equation 3B.5c_3 and 3B.5c_4 of Australian Government (2024) National Inventory Report 2022, Volume 1 |
| energy_diesel_FR | 0.26414926 | — | (2,3,4,1,1,na) [-] Fraction of total energy consumed on site that is diesel, based on average of values reported by Wiedemann et al. (2016) |
| energy_gasoline_FR | 0.392037059 | — | (2,3,4,1,1,na) [-] Fraction of total energy consumed on site that is gasoline, based on average of values reported by Wiedemann et al. (2016) |
| N2O_atm_dep_slaughter_pigs | — | slaughter_pigs_N2O_atm_dep*slaughter_pigs*(slaughter_pig_age/365) | [kg CH4/year] total dinitrogen monoxide emissions from atmospheric deposition associated with manure management of slaughter pigs |
| total_diesel | 29604917.110630598 | energy_conventional_consumed*energy_diesel_FR*total_liveweight/1000 | [MJ/year] total energy consumed on site |
| VS_gilts | 0.55 | — | (1,2,2,1,1,na) [kg/head/day] Volatile solids in manure, derived from PigBAL, Table A.5.5.5.4 of Australian Government (2024) National Inventory Report 2022, Volume 2. |
| N2O_direct_gilts | — | gilts_N2O_direct*gilts | [kg CH4/year] total dinitrogen monoxide emissions from manure management of gilts |
| N2O_direct_boars | — | boars_N2O_direct*boars | [kg CH4/year] total dinitrogen monoxide emissions from manure management of boars |
| CH4_animal_waste_slaughter_pigs | 3296908.6184775075 | slaughter_pigs_CH4_animal_waste*slaughter_pigs | [kg CH4/year] total methane emissions from manure management of slaughter pigs |
| energy_produced_total | 201359198.0942668 | energy_produced*total_liveweight/1000 | [MJ/year] |
| BioC_all_corr_elec | — | BioC_Actual_elec-BioC_all_elec | This is the correction to the biogenic carbon required to balance the biogenic carbon for the product in kg C. |
| total_electricity | — | energy_conventional_consumed*energy_electricity_FR*total_liveweight/1000/3.6 | [kWh/year] total energy consumed on site |
| BioC_Outputs | 13181633.5725 | CH4_recovered/16*12 | Total biogenic material exported from the process in kg C |
| energy_renewable_consumed | 561.2 | — | (2,2,1,1,1,na) [MJ/t LW] Total energy consumption on farm running outdoor production systems, Table S1 of Copley et al. (2024) |
| energy_sold | 832.8 | (energy_produced-energy_renewable_consumed) | [MJ/t LW] |
| CH4_animal_waste | 3731271.05944298 | CH4_animal_waste_sows+CH4_animal_waste_boars+CH4_animal_waste_gilts+CH4_animal_waste_slaughter_pigs | [kg CH4/year] total methane emissions from manure management of herd |
| NtoN2O | 1.5714285714285714 | 44/28 | Conversion factor of N to N2O |
| sows_CH4_animal_waste | 6.809426273716562 | VS_sows*B*methane_d*((MCF_covered_pond*VS_lost_covered_pond)+(MCF_uncovered_pond*(1-VS_lost_covered_pond)))*365 | [kg/head/year] Equation 3B.3_1 of Australian Government (2024) National Inventory Report 2022, Volume 1 |
| total_energy | 3224623286.647637 | total_liveweight*energy_livepigs+energy_sold_total | — |
| retail_rate | 0.77 | — | (2,na,2,1,1,na) As reported in Wiedemann and Yan (2014) |
| BioC_Actual_elec | -13181633.5725 | CH4_recovered/16*12*-1 | [kg C/year] The actual amount of biogenic carbon which should be allocated to the product in kg C. |
| national_herd_sows | 278200.0 | — | (1,2,2,1,1,na) [head] National herd statistics from Table A.5.5.5.10 of Australian Government (2024) National Inventory Report 2022, Volume 2. |
| DM_pigFeed | 0.85 | — | [kg dry mass/kg wet mass] As reported in Pig feed {AU}| market for pig feed | AusLCI, U |
| N2O_leaching_gilts | — | gilts_N2O_leaching*gilts | [kg CH4/year] total dinitrogen monoxide emissions from leaching associated with manure management of gilts |
| gilts_CH4_animal_waste | 8.141705327269802 | VS_gilts*B*methane_d*((MCF_covered_pond*VS_lost_covered_pond)+(MCF_uncovered_pond*(1-VS_lost_covered_pond)))*365 | [kg/head/year] Equation 3B.3_1 of Australian Government (2024) National Inventory Report 2022, Volume 1 |
| energy_LPG_FR | 0.343813681 | — | (2,3,4,1,1,na) [-] Fraction of total energy consumed on site that is LPG, based on average of values reported by Wiedemann et al. (2016) |
| All_En_porkLW | 96.26947091935263 | total_liveweight*energy_livepigs/total_energy*100 | Energy based allocation |
| VS_slaughter_pigs | 0.39 | — | (1,2,2,1,1,na) [kg/head/day] Volatile solids in manure, derived from PigBAL, Table A.5.5.5.4 of Australian Government (2024) National Inventory Report 2022, Volume 2. |
| energy_produced | 1394.0 | (energy_total_consumed-energy_net) | [MJ/t LW] |
| sows | 53108.38 | national_herd_sows*covered_pond_FR | [head] estimated number of heads |
| gilts_N2O_direct | — | E_gilts*NOF*NtoN2O | [kg/head/year] Equation 3B.3_3 and 3B.3_4 of Australian Government (2024) National Inventory Report 2022, Volume 1 |
| national_herd_slaughter_pigs | 7427783.106069189 | (national_meat_production*(1-pig_meat_from_sows_FR))/retail_rate/(1-moisture_loss)/dressing_rate/slaughter_pig_mass | [head] calculated number of slaughter pigs grown throughout the year, based on meat produced, dressing rate and average mass of pigs at turn-off. |
| slaughter_pigs_CH4_enteric | 0.5926905831220572 | I_slaughter_pigs*18.6*0.007/F*slaughter_pig_age | [kg/head/year] Equation 3A.3_1 of Australian Government (2024) National Inventory Report 2022, Volume 1 |
| CH4_enteric_slaughter_pigs | 840413.7884740556 | slaughter_pigs_CH4_enteric*slaughter_pigs | [kg CH4/year] total enteric emissions of slaughter pigs |
| feed_waste_boars | 0.05 | — | (1,2,2,1,1,na) [-] Feed wastage, Table A.5.5.5.2 of Australian Government (2024) National Inventory Report 2022, Volume 2. |
| slaughter_pigs | 1417963.794948608 | national_herd_slaughter_pigs*covered_pond_FR | [head] estimated number of heads |
| gilts_CH4_enteric | 2.151530242665701 | I_gilts*18.6*0.007/F*365 | [kg/head/year] Equation 3A.3_1 of Australian Government (2024) National Inventory Report 2022, Volume 1 |
| total_C_inFeed | 163588785.92975813 | feed_inputs*CC_pigFeed*DM_pigFeed | — |
| I_sows | 2.62 | — | (1,2,2,1,1,na) [kg/head/day] Feed intake, Table A.5.5.5.2 of Australian Government (2024) National Inventory Report 2022, Volume 2 |
| N2O_direct_sows | — | sows_N2O_direct*sows | [kg CH4/year] total dinitrogen monoxide emissions from manure management of sows |
| feed_sows | 53326920.9837 | I_sows*(1+feed_waste_sows)*sows*365 | [kg feed/year] total feed supply |
| boars_CH4_enteric | 1.979407823252445 | I_boars*18.6*0.007/F*365 | [kg/head/year] Equation 3A.3_1 of Australian Government (2024) National Inventory Report 2022, Volume 1 |
| CC_livepigs | 0.183 | — | [kg C/kg dry mass] |
| biogenicCO2_resp | 3.582684 | — | [kg CO2/kg LW] CO2 respired by animals (kg CO2 per kg liveweight) calculated |
| Frac_drylot | — | — | [%] Outdoor systems are referred to as 'dry lot'. |
| sows_N2O_direct | — | E_sows*NOF*NtoN2O | [kg/head/year] Equation 3B.3_3 and 3B.3_4 of Australian Government (2024) National Inventory Report 2022, Volume 1 |
| total_C_emitted | 24645377.610988647 | (CH4_enteric+CH4_animal_waste+CH4_recovered)/16*12+total_liveweight*DM_Livepigs*CC_Livepigs | — |
| boars_N2O_atm_dep | — | E_boars*FracGASM*EF_ATM_DEP*NtoN2O | [kg/head/year] Equation 3B.5c_1 and 3B.5c_2 of Australian Government (2024) National Inventory Report 2022, Volume 1 |
| energy_electricity_FR | — | — | [-] Information reported in Copley et al. (2024) suggest that 100% of electricity requirement of sites operating a covered pond is covered through on-site energy production. |
| E_sows | 17.91 | — | (1,2,2,1,1,na) [kg/head/year] Nitrogen in waste, derived from PigBAL, Table A.5.5.5.4 of Australian Government (2024) National Inventory Report 2022, Volume 2. |
| national_herd_boars | 10300.0 | — | (1,2,2,1,1,na) [head] National herd statistics from Table A.5.5.5.10 of Australian Government (2024) National Inventory Report 2022, Volume 2. |
| MCF_uncovered_pond | 0.756999475 | — | (1,2,2,1,1,na) [-] Methane conversion factor, calculated as an average of the MCF factor report of covered pond systems in each State in Table A.5.5.5.7 of Australian Government (2024) National Inventory Report 2022, Volume 2, weighted based on pig meat produced in each State from ABS 7215.0 Livestock Products, Australia, Table 13. |
| EF_ATM_DEP | 0.0041 | — | [Gg N2O-N/Gg N] Emission factor, Equation 3.B.5c_2 of Australian Government (2024) National Inventory Report 2022, Volume 1. |
| feed_waste_slaughter_pigs | 0.11 | — | (1,2,2,1,1,na) [-] Feed wastage, Table A.5.5.5.2 of Australian Government (2024) National Inventory Report 2022, Volume 2. |
| CH4_enteric_sows | 119748.97142301341 | sows_CH4_enteric*sows | [kg CH4/year] total enteric emissions of sows |
| national_meat_production | 436274000.0 | — | [kg] Total meat produced in 2022, from ABS 7215.0 Livestock Products, Australia, Table 13. |
| slaughter_pig_mass | 97.0 | — | (1,2,2,1,1,na) [kg] Average live weight of slaughter pig at turn off, Table A.5.5.5.2 of Australian Government (2024) National Inventory Report 2022, Volume 2. |
| N2O_leaching_boars | — | boars_N2O_leaching*boars | [kg CH4/year] total dinitrogen monoxide emissions from leaching associated with manure management of boars |
| feed_waste_sows | 0.05 | — | (1,2,2,1,1,na) [-] Feed wastage, Table A.5.5.5.2 of Australian Government (2024) National Inventory Report 2022, Volume 2. |
| VS_lost_covered_pond | 0.95 | — | (4,2,2,1,1,na) [-] Estimate reported by Australia Pork in personal communication. |
| BioC_balance | — | BioC_inputs-BioC_outputs | Current balance between biogenic carbon inputs less biogenic carbon outputs in kg C. |
| CC_pigFeed | 0.42 | — | [kg C/kg dry mass] As reported in Pig feed {AU}| market for pig feed | AusLCI, U |
| BioC_all_elec | -13181633.5725 | CH4_recovered/16*12*-1 | Biogenic carbon allocated to the product in kg C. |
| N2O_leaching_sows | — | sows_N2O_leaching*sows | [kg CH4/year] total dinitrogen monoxide emissions from leaching associated with manure management of sows |
| slaughter_pigs_N2O_direct | — | E_slaughter_pigs*NOF*NtoN2O | [kg/head/year] Equation 3B.3_3 and 3B.3_4 of Australian Government (2024) National Inventory Report 2022, Volume 1 |
| CH4_enteric_boars | 3892.0502206265846 | boars_CH4_enteric*boars | [kg CH4/year] total enteric emissions of boars |
| elec_wholesale_value | 0.128358916 | — | (1,1,1,1,1,na) [AUD/kWh] Calculated from the wholesale value of electricity per state, Figure 2.3 of Australian Energy Regulator (2025) State of the energy market 2025, weighted based on annual electricity consumption - NEM, reported on the Australian Energy Regulator's website (https://www.aer.gov.au/industry/registers/charts/annual-electricity-consumption-nem). |
| FracWET | 0.468445223 | — | (1,2,2,1,1,na) [-] Fraction of N available for leaching and runoff, calculated as an average of the FracWET factor reported for each State in Table A5.5.5.10.2, weighted based on the proportion of conventional pond systems used in each State as reported in Table A.5.5.5.7 of Australian Government (2025) National Inventory Report 2023, Volume 2. |
| N2O_atm_dep_boars | — | boars_N2O_atm_dep*boars | [kg CH4/year] total dinitrogen monoxide emissions from atmospheric deposition associated with manure management of boars |
| feed_boars | 1733217.8482499996 | I_boars*(1+feed_waste_boars)*boars*365 | [kg feed/year] total feed supply |
| N2O_atm_dep | — | N2O_atm_dep_sows+N2O_atm_dep_boars+N2O_atm_dep_gilts+N2O_atm_dep_slaughter_pigs | [kg CH4/year] total dinitrogen monoxide emissions from atmospheric deposition associated with manure management of herd |
| total_gasoline | 43938130.41910622 | energy_conventional_consumed*energy_gasoline_FR*total_liveweight/1000 | [MJ/year] total energy consumed on site |
| energy_conventional_consumed | 775.9 | — | (2,2,1,1,1,na) [MJ/t LW] Total energy consumption on farm running outdoor production systems, Table S1 of Copley et al. (2024) |
| water_total | 35084.0 | — | (2,2,1,1,1,na) [litre / kg LW] As reported in Table S1 of Copley et al (2024) |
| feed_inputs | 458231893.3606671 | feed_sows+feed_boars+feed_gilts+feed_slaughter_pigs | [kg feed/year] total feed supply |
| All_SWITCH | — | — | 0: economic, 2: energy; all other value is 100% to pork liveweight |
| boars_CH4_animal_waste | 5.921240238014401 | VS_boars*B*methane_d*((MCF_covered_pond*VS_lost_covered_pond)+(MCF_uncovered_pond*(1-VS_lost_covered_pond)))*365 | [kg/head/year] Equation 3B.3_1 of Australian Government (2024) National Inventory Report 2022, Volume 1 |
| slaughter_pigs_N2O_atm_dep | — | E_slaughter_pigs*FracGASM*EF_ATM_DEP*NtoN2O | [kg/head/year] Equation 3B.5c_1 and 3B.5c_2 of Australian Government (2024) National Inventory Report 2022, Volume 1 |
| All_Eco_porkLW | 99.32027298392129 | total_liveweight*LW_value/total_value*100 | Economic allocation used as default in AusLCI |
| N2O_leaching | — | N2O_leaching_sows+N2O_leaching_boars+N2O_leaching_gilts+N2O_leaching_slaughter_pigs | [kg CH4/year] total dinitrogen monoxide emissions from leaching associated with manure management of herd |
| sows_CH4_enteric | 2.254803694313655 | I_sows*18.6*0.007/F*365 | [kg/head/year] Equation 3A.3_1 of Australian Government (2024) National Inventory Report 2022, Volume 1 |
| energy_sold_total | 120295509.44971693 | energy_sold*total_liveweight/1000 | [MJ/year] |
| B | 0.45 | — | (1,2,2,1,1,na) [m3 CH4/kg VS] Methane emission potential, Equation 3B.3_1, Australian Government (2024) National Inventory Report 2022, Volume 1. |
| methane_d | 0.6784 | — | [kg/m3] Density of methane, as reported in Equation 3B.3_1, Australian Government (2024) National Inventory Report 2022, Volume 1. |
| E_boars | 16.93 | — | (1,2,2,1,1,na) [kg/head/year] Nitrogen in waste, derived from PigBAL, Table A.5.5.5.4 of Australian Government (2024) National Inventory Report 2022, Volume 2. |
| total_C_respirated | 138943408.31876948 | total_C_inFeed-total_C_emitted | — |
| water_tap_FR | 0.05 | — | (2,3,4,1,1,na) [-] Fraction of water sourced from reticulated resources (tap water), Wiedemann et al (2016) |
| sows_N2O_leaching | — | E_sows*Frac_drylot*FracWET*FracLEACH_MS*EF_LEACH*NtoN2O | [kg/head/year] Equation 3B.5c_3 and 3B.5c_4 of Australian Government (2024) National Inventory Report 2022, Volume 1 |
| CH4_enteric_gilts | 16141.575946667876 | gilts_CH4_enteric*gilts | [kg CH4/year] total enteric emissions of gilts |
| covered_pond_FR | 0.1909 | — | (1,2,2,1,1,na) [-] Fraction of Australian herd which is managed through covered pond systems, estimated as a pro-rata of percentages reported for outdoor (dry lot), deep litter, effluent pond and anaerobic digester/covered pond, which are the four system being represented in this inventory, Table A.5.5.5.6 of Copley et al (2024) |
| boars_N2O_direct | — | E_boars*NOF*NtoN2O | [kg/head/year] Equation 3B.3_3 and 3B.3_4 of Australian Government (2024) National Inventory Report 2022, Volume 1 |
| boars | 1966.2699999999998 | national_herd_boars*covered_pond_FR | [head] estimated number of heads |
| E_slaughter_pigs | 11.4 | — | (1,2,2,1,1,na) [kg/head/year] Nitrogen in waste, derived from PigBAL, Table A.5.5.5.4 of Australian Government (2024) National Inventory Report 2022, Volume 2. |
| total_value | 631013170.9487736 | total_liveweight*LW_value+energy_sold_total/3.6*elec_wholesale_value | — |
| All_Eco_elec | 0.6797270160787068 | energy_sold_total*elec_wholesale_value/3.6/total_value*100 | Economic allocation used as default in AusLCI |
| N2O_atm_dep_gilts | — | gilts_N2O_atm_dep*gilts | [kg CH4/year] total dinitrogen monoxide emissions from atmospheric deposition associated with manure management of gilts |
| feed_slaughter_pigs | 395641250.6412171 | I_slaughter_pigs*(1+feed_waste_slaughter_pigs)*slaughter_pigs*slaughter_pig_age | [kg feed/year] total feed supply |
| water_fresh_FR | 0.1 | — | (2,3,4,1,1,na) [-] Fraction of water sourced from surface water, Wiedemann et al (2016) |
| feed_waste_gilts | 0.1 | — | (1,2,2,1,1,na) [-] Feed wastage, Table A.5.5.5.2 of Australian Government (2024) National Inventory Report 2022, Volume 2. |
| I_boars | 2.3 | — | (1,2,2,1,1,na) [kg/head/day] Feed intake, Table A.5.5.5.2 of Australian Government (2024) National Inventory Report 2022, Volume 2 |
| CH4_animal_waste_gilts | 61082.08579614915 | gilts_CH4_animal_waste*gilts | [kg CH4/year] total methane emissions from manure management of gilts |
| gilts_N2O_atm_dep | — | E_gilts*FracGASM*EF_ATM_DEP*NtoN2O | [kg/head/year] Equation 3B.5c_1 and 3B.5c_2 of Australian Government (2024) National Inventory Report 2022, Volume 1 |
| water_bore_FR | 0.85 | — | (2,3,4,1,1,na) [-] Fraction of water sourced from bore, Wiedemann et al (2016) |
| I_slaughter_pigs | 1.71 | — | (1,2,2,1,1,na) [kg/head/day] Feed intake, Table A.5.5.5.2 of Australian Government (2024) National Inventory Report 2022, Volume 2 |
| total_LPG | 38533424.3507091 | energy_conventional_consumed*energy_LPG_FR*total_liveweight/1000 | [MJ/year] total energy consumed on site |
| BioC_Inputs | 13181633.5725 | CH4_recovered/16*12 | kg biogenic carbon imported in with input animals |
| energy_livePigs | 21.49111122 | — | [MJ/kg] Calculated as weighted average of each fraction output (retail cut, offal, pet food and rendering material) |
| sows_N2O_atm_dep | — | E_sows*FracGASM*EF_ATM_DEP*NtoN2O | [kg/head/year] Equation 3B.5c_1 and 3B.5c_2 of Australian Government (2024) National Inventory Report 2022, Volume 1 |
| slaughter_pigs_N2O_leaching | — | E_slaughter_pigs*Frac_drylot*FracWET*FracLEACH_MS*EF_LEACH*NtoN2O | [kg/head/year] Equation 3B.5c_3 and 3B.5c_4 of Australian Government (2024) National Inventory Report 2022, Volume 1 |
| N2O_direct_slaughter_pigs | — | slaughter_pigs_N2O_direct*slaughter_pigs*(slaughter_pig_age/365) | [kg CH4/year] total dinitrogen monoxide emissions from manure management of slaughter pigs |
| slaughter_pig_age | 147.0 | — | (1,2,2,1,1,na) [days] Average slaughter pig age at turn off, Table A.5.5.5.2 of Australian Government (2024) National Inventory Report 2022, Volume 2. |
| All_porkLW | 99.32027298392129 | iff(All_SWITCH=0;All_Eco_porkLW;iff(All_SWITCH=2;All_En_porkLW;100)) | Selected allocation based on allocation switch |
| pig_meat_from_sows_FR | 0.0478 | — | (1,1,1,1,1,na) [-] Fraction of pig meat produced from sows, as reported by Australia Pork for FY24 |
| VS_boars | 0.4 | — | (1,2,2,1,1,na) [kg/head/day] Volatile solids in manure, derived from PigBAL, Table A.5.5.5.4 of Australian Government (2024) National Inventory Report 2022, Volume 2. |
| EF_LEACH | 0.011 | — | [Gg N2O-N/Gg N] Emission factor, Equation 3.B.5c_4 of Australian Government (2024) National Inventory Report 2022, Volume 1. |
| energy_net | -56.9 | — | (2,2,1,1,1,na) [MJ/t LW] Total energy consumption on farm running outdoor production systems, Table S1 of Copley et al. (2024) |
| E_gilts | 16.7 | — | (1,2,2,1,1,na) [kg/head/year] Nitrogen in waste, derived from PigBAL, Table A.5.5.5.4 of Australian Government (2024) National Inventory Report 2022, Volume 2. |
| slaughter_pigs_CH4_animal_waste | 2.3251007044203122 | VS_slaughter_pigs*B*methane_d*((MCF_covered_pond*VS_lost_covered_pond)+(MCF_uncovered_pond*(1-VS_lost_covered_pond)))*slaughter_pig_age | [kg/head/year] Equation 3B.3_1 of Australian Government (2024) National Inventory Report 2022, Volume 1 |
| VS_sows | 0.46 | — | (1,2,2,1,1,na) [kg/head/day] Volatile solids in manure, derived from PigBAL, Table A.5.5.5.4 of Australian Government (2024) National Inventory Report 2022, Volume 2. |
| total_liveweight | 144447057.45643243 | national_meat_production/retail_rate/(1-moisture_loss)/dressing_rate*covered_pond_FR | [kg] calculated mass of liveweight pigs processed |
| NOF | — | — | [-] Nitrous oxide emission factor for swine, Table A.5.5.5.8 of Australian Government (2024) National Inventory Report 2022, Volume 2. |
| F | 55.22 | — | [MJ/kg CH4] Conversion factor, equation 3.A.3_1 of Australian Government (2024) National Inventory Report 2022, Volume 1 |
| LW_value | 4.33878 | — | [AUD/kg LW] As reproted in Table 6, ABARES (2025) Agricultural commodities and trade data. |
| dressing_rate | 0.78 | — | (1,2,2,1,1,na) [-] Dressing rate, Table A.5.5.5.2 of Australian Government (2024) National Inventory Report 2022, Volume 2. |
| energy_total_consumed | 1337.1 | — | (2,2,1,1,1,na) [MJ/t LW] Total energy consumption on farm running outdoor production systems, Table S1 of Copley et al. (2024) |
| FracGASM | — | — | [-] Fraction of N volatilised, Table A.5.5.5.9 of Australian Government (2024) National Inventory Report 2022, Volume 2. |
| feed_gilts | 7530503.887499999 | I_gilts*(1+feed_waste_gilts)*gilts*365 | [kg feed/year] total feed supply |
| MCF_covered_pond | 0.1 | — | (1,2,2,1,1,na) [-] Methane conversion factor, calculated as an average of the MCF factor report of covered pond systems in each State in Table A.5.5.5.7 of Australian Government (2024) National Inventory Report 2022, Volume 2, weighted based on pig meat produced in each State from ABS 7215.0 Livestock Products, Australia, Table 13. |
| N2O_direct | — | N2O_direct_sows+N2O_direct_boars+N2O_direct_gilts+N2O_direct_slaughter_pigs | [kg CH4/year] total dinitrogen monoxide emissions from manure management of herd |
| All_En_elec | 3.730529080647365 | energy_sold_total/total_energy*100 | Energy based allocation |
| CH4_recovered | 17575511.43 | — | [kg CH4/year] Calculated as the difference between methane emission from manure per head in system using uncovered ponds vs systems using covered ponds. It assumes the same methane emissions. Used to balance biogenic carbon flows. |
| CH4_animal_waste_sows | 361637.59812652314 | sows_CH4_animal_waste*sows | [kg CH4/year] total methane emissions from manure management of sows |
| All_elec | 0.6797270160787068 | iff(All_SWITCH=0;All_Eco_elec;iff(All_SWITCH=2;All_En_porkLW;0)) | Selected allocation based on allocation switch |
| I_gilts | 2.5 | — | (1,2,2,1,1,na) [kg/head/day] Feed intake, Table A.5.5.5.2 of Australian Government (2024) National Inventory Report 2022, Volume 2 |
| N2O_atm_dep_sows | — | sows_N2O_atm_dep*sows | [kg CH4/year] total dinitrogen monoxide emissions from atmospheric deposition associated with manure management of sows |