Brick dome kiln
A downdraft brick kiln with a tall chimney and a smoke burner that burns off tar and gas, so it runs clean enough for pollution consent.
- Wood per batch
- 12–15 m³
- Charcoal out
- about 2 t
- Cycle
- about 2 weeks
Kilns · Carbonisation · dMRV · Kolkata
We build the kilns that turn biomass into carbon.
Carbon Safe designs and builds charcoal and biochar kilns for producers, batch carbonisation plants for small units and research labs, and the digital measurement that turns biochar into carbon credits.
What we do
From the kiln to the carbon credit, one team.
We build the equipment, train the people who run it and measure every batch, so your charcoal or biochar business works from the first burn.
01Charcoal makers · FPOs · biochar developers
Kilns designed and built for you
Brick dome, jute-stick, flame-curtain, steel retort, bamboo and white-charcoal kilns. We supply drawings, build on your site and train your crew.
02Small units · universities · startupsBatch carbonisation plants
Compact, instrumented batch plants for small producers and for research and feedstock trials.
03Project developers · NGOsdMRV consultancy
Field data capture, evidence packs and registry readiness for biochar carbon credits.
04Feedstock owners · CSR teamsBiochar carbon projects
You run the kilns, we handle measurement and the registry, and the credit income is shared.
05Hospitals · municipalities · industryPellet-fired incinerators
Waste incinerators fired by biomass pellets instead of diesel or furnace oil. Design, supply and commissioning.
06Farms · exporters · listed companiesBiochar supply and carbon reporting
Biochar for soil from measured production, plus footprints for BRSR Core, CCTS and EU CBAM.
Kilns we build
The right kiln for your wood, your residue and your buyer.
Every design starts with your feedstock and what you want to sell. Figures are typical ranges; we size each kiln after a site visit.
Jute-stick kiln
A top-lit brick and earth chamber with a vaulted roof and flare stacks. Built as a pilot first, then at factory size.
- Pilot (3.0 × 1.8 m)
- 300–400 kg char
- Factory (8 × 3 m)
- 1.3–2 t char
- Cycle
- about 3 days
Flame-curtain kiln
A steel cone or lined pit where the flame burns its own smoke. Quick to set up in villages and suited to small-scale biochar credit methods.
- Batch time
- a few hours
- Feedstock
- twigs, stalks, husk
- Built in
- steel or earth
Steel retort
The wood is heated in a closed chamber and its own gases are burnt to fire it. Higher yield, a cleaner burn and tight temperature control.
- Yield
- 30–35%
- Cycle
- 1–2 days
- Best for
- consistent quality
Bamboo kiln
A dome kiln tuned for bamboo. Bamboo charcoal can be exported from India with legal-source papers, unlike wood charcoal.
- Feedstock
- bamboo poles, offcuts
- Products
- charcoal, briquettes
- Region
- Bengal, Northeast
White charcoal kiln
A thick-walled clay and stone kiln for binchotan-style charcoal, finished at around 1,000 °C and smothered in sand and ash.
- Wood
- very dense hardwood
- Cycle
- 10–14 days
- Market
- restaurants, lifestyle
Every kiln comes with
- Construction drawings
- Bill of materials
- On-site build supervision
- Thermocouples for every burn
- Operator training
- Permit guidance
Batch carbonisation plants
Small plants for small producers, and for research.
Not everyone needs a big kiln. Our batch plants carbonise one controlled load at a time, with every temperature logged. That suits a unit starting small, a lab testing feedstocks, or a startup proving its biochar before it scales.
Controlled heatingSet and repeat a temperature profile batch after batch.
Data loggingThermocouples at several points, recorded for every run.
Clean exhaustGases are burnt in an afterburner or flare, not released.
Sample accessTake char samples and collect wood vinegar for testing.
Universities and labsKVKs and research stationsBiochar startupsFPOs starting smallFeedstock trials
Size a plant with us →
Batch plant · Run 07Logging
Core548 °C
Wall412 °C
Afterburner860 °C
Illustration with sample readings
Batch 0142 · Kiln 03● Synced
Biochar batch record
Feedstock in1,200 kg rice straw
Peak temperature650 °C
Biochar out290 kg
Location22.57° N, 88.36° E
✓ Evidence ready for verifier
Net removal0.55 tCO₂e
dMRV consultancy
Measured properly, so your biochar earns its credits.
Carbon buyers pay for removals they can verify. We set up the digital measurement, reporting and verification that registries ask for, and train your team to keep it running.
Registry readiness review
We check your feedstock, kiln, records and sales against the methodology you plan to use, and list what is missing.
Field data, captured on a phone
Weights, temperatures, geotagged photos and where the biochar goes, recorded batch by batch, even offline.
Evidence packs for verifiers
Lab results, logs and calculations assembled the way auditors expect to see them.
Sample record for illustration.
How we work
From first call to first burn.
Talk
Tell us your feedstock, your site and what you want to sell.
Site and feedstock check
We look at volumes, moisture and space, and the permits you will need.
Design
You get drawings, a bill of materials and a clear quote.
Build and train
We supervise the build and run the first batches with your crew.
Measure and support
We log the burns, tune the yield and set up dMRV if you want credits.
Why Carbon Safe
Built by people who have run kilns, not just drawn them.
Our team has hands-on experience with charcoal machines, kiln charcoal, biochar carbon credits, carbon sequestration methods, dMRV and biomass-pellet-fired incinerators. We bring that field experience to every design.
Kilns and machinesBrick, earth and steel kilns, retorts and continuous charcoal machines.
Biochar creditsMethodologies, registries and the records they demand.
MeasurementThermocouples, data logging and digital MRV in the field.
Clean combustionSmoke burners, flares and pellet-fired incinerators.
Now taking our first partner projects
Carbon Safe is a new company. Our first partners get the founders' direct, hands-on attention on design, build and measurement.
Jan 2026100,000+ tof Indian biochar removals contracted by Microsoft, after a similar Google deal.
Mar 20258 methodsapproved under India's carbon offset mechanism.
CCTS 2025–27490 plantsnow have emission targets and may need credits.
Credit estimate
What could your biochar earn in carbon credits?
A first estimate of biochar output, carbon removal and credit income. Real figures depend on your kiln, your lab results and the registry's rules.
Indicative credit income per year
₹0
before registry, verification and sales costs
Net removal
0
Biochar
0 t
per year
Assumes 80% of the carbon stays stored for the long term and a 10% deduction for process emissions. Registries set these factors, so treat this as a first look before a feasibility study.
Plan a project with us →
Contact
Tell us what you want to build.
Do you build kilns outside West Bengal?
Yes. We design for any site and supervise the build in person or with a local mason team we train.
Which kiln is right for me?
It depends on your feedstock, its moisture and size, and who will buy the charcoal or biochar. We recommend a design after a short site and feedstock check.
Can a batch plant be used for research?
Yes. Batch plants log temperatures at several points and allow sampling, so they suit feedstock trials and biochar quality studies.
Can you add dMRV to a kiln we already run?
Yes. We set up data capture on existing kilns and build the evidence pack your verifier needs.