BOLD Carbon (CH₄) Overview

Overview

The BOLD (Breakthrough in Organics Landfill Diversion) Carbon (CH₄) Credit is a dMRV methodology for verifying and certifying prevented methane emissions from aerobic composting of organic waste. BOLD Carbon (CH₄) builds on the BOLD Recycling methodology by adding greenhouse gas emissions quantification — calculating how much CO₂-equivalent was avoided by composting waste instead of sending it to a landfill.

BOLD Carbon (CH₄) generates Tokenized Carbon Credits (TCC), represented on-chain as C-CARB.CH4 tokens (methane avoidance). Each credit represents 1 metric ton of CO₂-equivalent emissions avoided. (Other carbon methodologies may issue TCCs with different on-chain symbols.)

Scientific basis

BOLD Carbon (CH₄) uses established environmental science from the UNFCCC Clean Development Mechanism:

• Baseline emissions: Calculated using UNFCCC CDM Tool 04 — emissions from solid waste disposal sites (landfills and dumps)
• Real emissions from composting: Calculated using UNFCCC CDM Tool 13 — project and leakage emissions from composting
• Avoidance methodology: UNFCCC AMS-III.F v12.0 — avoidance of methane emissions through composting

The core calculation: Avoided Emissions = Baseline Emissions − Real Emissions

Composting 1 ton of food waste mixed with 1 ton of green waste avoids over 2 tons of CO₂e compared to landfill disposal without methane capture. See the BOLD Carbon (CH₄) Framework for the detailed calculations.

Scope

• Facility type: Small-scale, off-site professional aerobic composting facilities (SSC)
• Waste types: Food waste and green waste (garden/yard trimmings)
• Baseline scenarios: Landfill without methane capture, landfill with methane flaring, dump site
• Verification: dMRV with MassID chain of custody tracking
• Credit issuance: GasID certificates → C-CARB.CH4 credit tokens

How it works

1. Organic waste is verified as composted through BOLD Recycling, generating RecycledID certificates.
2. The composting facility's mix ratio (food waste to green waste) is verified.
3. Baseline emissions are calculated based on the local waste disposal scenario.
4. Real emissions from composting are calculated using verified facility data.
5. The difference (avoided emissions) generates GasID certificates.
6. GasID certificates are created and corresponding C-CARB.CH4 credits are minted.
7. Revenue from credit purchases is distributed per the Rewards Distribution Policy.

Resources

• View on Carrot Explorer
• BOLD Carbon (CH₄) Methodology Framework (PDF)

Feedback: method@carrot.eco

Learn about BOLD Recycling · View rules catalog · View framework · View application