Forest Fire Prevention Protocol Using Thermolysis and Biochar (French version - FR)
Technical and operational note — Éric Jacob, Engineer (Maths-Sup, DEA)
The Problem: A Destructive and Costly Cycle
Modern megafires are not accidents—they are the predictable result of an accumulation of unmanaged fuel. Dead wood, dense undergrowth, and dry brush: every year without clearing increases the fuel load and, consequently, the potential intensity of a fire.
Preventive brush clearing exists but faces three obstacles:
- High cost: removal and processing of forest waste are borne by local authorities or landowners
- No value recovery: clearing residues are burned on-site or sent to landfills, with no value recovered
- Lack of personnel and funding: at-risk areas are vast, while budgets are limited
Haffner technology reverses this equation: brush clearing becomes a productive activity, funding its own operations through the production of energy, biochar, and carbon credits.
Biochar as a Natural Firebreak: Physical Properties
Biochar is the solid residue resulting from the thermolysis of biomass. Its physical properties make it an ideal material for fire prevention:
- High ignition temperature: Biochar, stripped of volatile compounds through thermolysis, ignites at temperatures far higher than natural wood (>700°C compared to 250–300°C for dry wood).
- Low flame production: It smolders as embers without an open flame, preventing fire spread via radiant heat.
- Mechanical stability: When incorporated into the soil, it resists runoff and remains in place for decades.
- Porosity: Its porous structure retains soil moisture, maintaining a cooler, less flammable buffer zone.
The mobile Haffner module: a field-ready tool
A 2 MW Haffner C-iC module offers a decisive operational advantage for forestry work: it can be transported on standard roads without requiring an oversized load convoy. A standard truck can deliver it to forest areas accessible via logging tracks.
Mobile operational setup
The module requires a gradual warm-up period of several hours to reach steady-state operation. Consequently, it is not moved daily; instead, it remains on-site for several weeks, fed by the crew during the day and running continuously at night using the accumulated stockpile. Operational cycle:
Carrier truck transports the 2MW module along forest tracks
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On-site installation (temporary pad, stabilized ground, or potentially kept on the truck if mobile)
↓
Supply of local biomass (brush-clearing waste) by the day shift (7 hours/day)
↓
Continuous day-and-night production using the stockpile built up during the day:
├── Syngas → electricity and heat for the worksite
├── Hydrogen → fuel for forestry machinery
└── Biochar → redistributed across the area as a preventive measure
↓
Relocation to the next sector once the current area is exhausted
Operational protocol: comprehensive prevention cycle
Phase 1 — Mapping and risk analysis
Before any intervention, establish the following for each zone:
- Fuel load map: density of deadwood and brush per hectare (LiDAR or field data)
- Prevailing wind map: direction and intensity by season, primary fire spread corridors
- Topography: slopes, passes, ravines (natural fire accelerators)
- Water sources and access: existing tracks, vehicle-accessible areas
- Priority zoning: proximity to homes, critical infrastructure, and Natura 2000 sites
Phase 2 — Targeted brush clearing
Brush clearing is not uniform—it follows a strategy of breaking fuel continuity:
Guiding principles:
- Create breaks perpendicular to prevailing winds
- Prioritize natural spread corridors (thalwegs, passes, ridges)
- Retain mature trees with high water content (deciduous trees, green conifers)
- Remove dense undergrowth and deadwood on the ground
Recommended widths for cleared strips:
| Zone | Strip width | Frequency | :—– | :————- | :———- | |
| Forest-habitat interface | 50–100 m | Annual | ||||
| Prevailing wind corridor | 30–50 m | Every 2 years | ||||
| Slope break (ridge) | 20–30 m | Every 3 years | ||||
| General buffer zone | 10–20 m | Every 5 years |
Phase 3 — On-site thermolysis
Brush-clearing residues (branches, scrub, deadwood) are transported to the Haffner module positioned on the nearest forest track. The module processes the biomass continuously:
Typical processing balance (1 tonne of dry biomass):
| Product | Quantity | Utilization |
|---|---|---|
| Syngas | 900–1,200 Nm³ | Electricity + on-site heat |
| Biochar | 200–350 kg | Preventive redistribution |
| Hydrogen | 50–80 kg | Machinery fuel |
| Carbon credits | 0.7–1.2 tCO₂e | Voluntary market |
Phase 4 — Biochar redistribution
This is the least intuitive yet most effective step of the protocol.
Redistribution methods based on terrain:
1. Surface spreading (flat areas)
- Mechanical spreading at 2–5 t/ha on cleared strips
- Light surface incorporation using a rake or forestry harrow
- Promotes moisture retention and soil fire resistance
2. Biochar trenches (sloped areas)
- Digging trenches 20–30 cm deep, perpendicular to the slope, spaced 5–10 m apart
- Filling with compacted biochar
- Dual effect: slows runoff (erosion control) and creates underground thermal barriers
- Prevents washout during torrential rains
3. Reinforced buffer zones (wildland-urban interfaces)
- Application of 5–10 t/ha in a 5–10 cm layer
- Biochar + compost mix for stabilization (revitalized biochar)
- Seeding with high-moisture ground cover plants (ferns, mosses, hardy grasses) to keep biochar in place
4. Aerial dispersal (inaccessible areas)
- Biochar + natural binder (clay, water) mixture
- Aerial application via drone or helicopter on ridge lines or ravines inaccessible to vehicles
Phase 5 — Monitoring and replenishment
Maintenance frequency by zone:
| Zone type | Biochar replenishment | Brush clearing |
|---|---|---|
| Habitat interface | 3–5 years | Annual |
| Wind corridor | 5–7 years | Every 2 years |
| General buffer zone | 7–10 years | Every 3–5 years |
Since biochar remains stable in the soil for centuries, replenishment is only required to compensate for losses due to runoff and to maintain the effective thickness.
Optimal layout based on wind and topography
Staggered layout principle
To maximize the effectiveness of firebreaks, fuel breaks must be arranged in a staggered pattern relative to prevailing winds:
Prevailing wind →→→→→→→→→→→→→→
[Forest][ Strip A ][Forest][ Strip B ][Forest][ Strip C ][Forest][ Strip D ]
A fire crossing Strip A encounters the offset Strip C— it cannot advance in a straight line.
Adaptation to forest types
Homogeneous forest (pine, eucalyptus): Strips perpendicular to prevailing wind; spacing 200–500 m, width 30–50 m. Top priority, as these species are highly flammable.
Mixed forest (deciduous + coniferous): Preserve and reinforce deciduous trees (natural firebreaks). Focus brush clearing on coniferous areas. Mediterranean scrubland (maquis): Rapid rotation (every 2–3 years) using narrow strips (10–15 m). Scrub regrows quickly—frequency is more important than strip width.
Mountain forest (slope corridors): Priority given to biochar trenches running perpendicular to the slope. Horizontal strips slow the spread of fire (upslope fires spread 8 times faster).
The business model: a self-financing cycle
The protocol is designed to be economically self-sustaining without subsidies:
| Revenue source | Calculation basis | Order of magnitude |
|---|---|---|
| Hydrogen sales | 60 kg/t biomass × €6/kg | €360/t biomass |
| Brush-clearing service fee | Contracts with local authorities/ONF | Variable supplement |
A single unit operating 200 days/year processes 24 tonnes of biomass per day (day-shift feeding, continuous day-and-night consumption). This totals 4,800 t/year, producing 288,000 kg of hydrogen and generating €1.73M/year (at €6/kg)—an amount sufficient to fund the crew, the truck, maintenance, and biochar deployment without public aid. —
National rollout: a mobile prevention brigade
At the national level, this protocol proposes the creation of mobile preventive thermolysis brigades:
- Standard unit: 1 carrier truck + 1 Haffner 2MW module + 4 operators
- Coverage area: 500–1,000 hectares/year per brigade
- Funding: carbon credits + contracts with local authorities + insurance
- Status: local businesses, forestry cooperatives, or municipal operations
France has approximately 17 million hectares of forest. High-risk areas (PACA, Occitanie, Corsica, Aquitaine) account for 3–4 million hectares. Around one hundred mobile brigades would suffice to cover the prevention cycle in these critical zones.
Conclusion: turning risk into a resource
Today, wildfires represent a pure cost—in terms of lives, property, biodiversity, and CO₂ emissions. This protocol transforms that cost into a productive cycle:
Deadwood + brush → energy + hydrogen + biochar → firebreaks → fewer fires → less CO₂ → regenerated soil → more resilient forests
Haffner Energy provides the mobile technology that makes this cycle possible, profitable, and immediately deployable—without waiting for hypothetical centralized infrastructure.
Linkedin: Eric Jacob
Basic private research @ | Multiple Degrees in Physical Measurements | Energy transition advisor