The Biochar Value Chain: Sourcing, Production and Application

A VM0044 project does not happen in a single place. It spans multiple locations and activities. To account for all greenhouse gas flows accurately, the methodology defines a clear project boundary that covers the entire journey of biomass from its original source to its final application.

The Three Stages of the Biochar Value Chain

Every VM0044 project moves through three distinct stages. All three must remain completely inside the project boundary.

• Stage 1: Sourcing. Waste biomass is identified, collected, and transported to the production facility. Some feedstocks require pre-treatment such as drying, shredding, or pelletizing before they can be processed.
• Stage 2: Production. The prepared biomass safely feeds into a thermochemical conversion unit (using pyrolysis or gasification) at a new greenfield facility. The output is biochar, which operators then sample and test.
• Stage 3: Application. The biochar is transported to its final destination. It is then applied directly to soil (like cropland or forest) or incorporated into non-soil products (such as concrete or asphalt).

The Greenfield Requirement

VM0044 requires that all biochar production takes place at a brand new greenfield facility. A greenfield facility is defined as one built specifically for this primary project, rather than an existing facility that is just repurposed.

The project start date is the exact first instance of biochar production at this greenfield facility. This specific moment is when the crediting period officially begins.

The Spatial Project Boundary

The project boundary features three spatial components reflecting the three stages of the value chain:

1. Sourcing location: The farm, forest, processing plant, or other site where the waste biomass initially originates.
2. Production facility: The site where biomass is actively converted into biochar. This must be a greenfield facility.
3. Application location: The field, urban green space, concrete plant, or asphalt facility where the final biochar is ultimately used.

These locations may be in entirely different regions and sometimes quite far apart. The methodology requires that greenhouse gas flows at each specific location are fully included in the accounting.

GHG Sources: What is Included and Excluded

Not every possible source of greenhouse gas emissions is included in the rigorous VM0044 accounting. The methodology applies very specific rules about which sources are included and which are excluded. This depends largely on their relevance and overall size.

The table below summarizes the key sources for both the baseline scenario and the project scenario.

Why Baseline Emissions at the Sourcing Stage are Set to Zero

This is one of the more counterintuitive aspects of VM0044. You might naturally expect that the baseline scenario would readily include all emissions from burning or decaying feedstock. After all, preventing those emissions is a core part of the project's climate benefit.

While the methodology does include some baseline emissions from feedstock decay or combustion in very specific cases, the conservative default for the sourcing stage overall is always strictly zero.

The primary reason is incredibly practical: waste biomass feedstocks are highly diverse. Rice straw decays altogether differently from sawmill offcuts. Furthermore, decay rates vary wildly by region, moisture content, and climate. Rather than rely upon highly uncertain or variable emission factors that could wrongly inflate the credit calculation, VM0044 takes the most conservative approach possible. It simply sets baseline sourcing emissions straight to zero.

This remains highly conservative because it absolutely ensures the project does not claim any credit for emissions it seemingly avoids at the sourcing stage unless there is overwhelmingly strong evidence to support a non-zero value. In practice, the true carbon credit calculation predictably focuses primarily on the stable carbon stored in the actual biochar, not on any theoretical baseline decay emissions.

The 200 km Transportation Threshold

Transportation emissions are deliberately only included in the carbon accounting when the direct distance firmly exceeds 200 kilometers. This threshold applies completely to both initial feedstock transport (sourcing to production) and final biochar transport (production to application site).

For any measurable distances up to 200 km, transportation emissions are simply considered too small to be worth meticulously measuring and are thereby automatically excluded. For strict distances well over 200 km, only direct road transport is officially allowed, and resulting emissions are carefully calculated using the standard CDM TOOL12 methodology.

This practical rule significantly simplifies fundamental accounting for the many local projects where all stages comfortably occur within a truly reasonable geographic radius.

Chain of Custody

The methodology firmly requires tight documentation that perfectly tracks biochar right from the exact point of waste biomass origin entirely through active production directly to the final application site. This specific procedure is highly known as the chain of custody.

Comprehensive chain of custody records fundamentally provide genuine assurance to all third party auditors and buyers that the biochar safely credited was actually successfully produced from thoroughly eligible feedstocks and immediately applied in an actively eligible end use. Without this specific documentation trail firmly in place, zero credits can be successfully issued.