Version history

Description of the change	Justification	Date	Version changed to
Remove biogas torching parameter	Below impact threshold	May 2023	V1.1
Define gas self consumption rate of 4%	GHG results not sensitive, simplify data collection	May 2023	V1.1
Set digestate produced to 85% of the sum of feedstock input fresh mass	Precise values rarely available	May 2023	V1.1
Add possibility to have digestate separated during storage, and during spreading	Improved accuracy	June 2023	V1.1
Specify amounts and nutrient content of different phases of digestate (raw, liquid, solid)	Improved accuracy	June 2023	V1.1
Remove transport of manure and slurry in baseline and project scenario	Assumed to be the same in both scenarios, no effect in a comparative LCA	June 2023	V1.1
Add options for digestate transport via irrigation pipes or truck transport	Improved accuracy, more relevant options for Project Developers	June 2023	V1.1
Calculate digestate storage methane emission rate based on residence time in digester, rather than fixed rate of 2% of biogas produced	Improved accuracy	July 2023	V2.1
Updated parameter on amount of methane leaked during purification	Error in units conversion	September 2023	V2.2
Add possibility for projects to provide their own data on methane leakage rates during purification, instead of standard leakage rate of 0.7% of biogas leaked	Improved accuracy, increased use of project specific data	October 2023	V2.2
New section Monitoring Plan	Alignment with Standard Rules V6	March 2024	V2.3
Add share of biogas in the grid to the baseline scenario	Alignment with Riverse Standard Rules V6 and increase conservativeness.	March 2024	V2.3
Added equations for calculation GHG reductions	Increased transparency.	May 2024	V3.0
Aligned terminology with ISO 14064-2:2019	Improved consistency with the voluntary carbon market. LCA principles still apply.	May 2024	V3.0
Added risk assessment template for environmental and social do no harm	Provide more detailed and prescriptive assessment framework, clearer instructions for project developers.	May 2024	V3.0
Removed text for sections that are the same for all methodologies: Measurability Real Additionality Technology readiness level Minimum impact Independently verified	Repeated text from the Standard Rules.	May 2024	V3.0
Added Monitoring Plan section	Alignment with Riverse Standard Rules V6.	May 2024	V3.0
Remove Rebound Effect and Independently Validated criteria	Alignment with Riverse Standard Rules V6.	May 2024	V3.0
Added uncertainty assessment section	Alignment with Riverse Standard Rules V6.	May 2024	V3.0
Model infrastructure instead of full data collection, move under “Digestion and biomethane management” section	Simplification, results not sensitive to impacts	May 2024	V3.0
Model activated carbon based on energy production, instead of direct data collection	Simplification, results not sensitive to impacts	May 2024	V3.0
Change biomethane combustion methane emissions from fossil to biogenic	Error	May 2024	V3.0
Reintroduce transport of manure and slurry in baseline scenario	Completeness, often collected project transport distance anyway	May 2024	V3.0
Add five different energy cover crop options, instead of a single proxy	Improved accuracy, increased use of project specific data	May 2024	V3.0
New Leakage requirements	More rigorous eligibility criteria, and clear requirements and instructions for Project Developers (after public consultation)	July 2024	V3.0
Include methane emissions from manure and slurry storage in project and baseline scenarios	Public consultation feedback, erroneously assumed previously that they are the same in project and baseline scenarios	July 2024	V3.0
Create project scope requirements	Specify the project scope as one anaerobic digestion site	October 2024	V3.1
Add minimum list of ESDNH risks	Align with Standard Rules V6.2	October 2024	V3.1