Make Biochar

produce YOUR OWN BIOCHAR

Whether you want to produce Biochar on your own land, rent a kiln, deliver wood to our facility, or purchase your own kiln, we offer flexible models to suit different needs. By joining our community, you gain access to expert guidance, training, and support to ensure safe and efficient Biochar production. Explore our models and find the best option for you — whether you’re a farmer, landowner, gardener, or ecological advocate. Together, we can build a more regenerative future.

How It Works

Members participate in the running of Sierra Preta through a €30 annual fee and by donating part of the Biochar they produce to a common pot. By being a member, you receive training from our team on how to operate the kiln, and we organise the transport of our kilns to you land.

Kiln Delivery & Setup

After agreeing on a delivery date, we’ll transport the kiln directly to your land. You can use the kiln to process your pruning residues, turning them into valuable Biochar.

Training & Support

You’ll receive comprehensive training materials and hands-on guidance during your first Biochar production run. Our team is available to provide ongoing support, ensuring you’re confident in using the kiln independently.

Independent Operation

After the initial training, if you’re ready, we’ll leave the kiln with you for as long as you need to process your wood residues. You’ll have the freedom to run the kiln as much as possible, maximizing the use of our equipment.

Contribution to the Common Pot

As part of the Sierra Preta community, we ask that you donate part of the Biochar you produce to our common pot. For the first production run, we request 2/3 of the Biochar be donated. After that, we ask for half of the Biochar produced in each subsequent run.

Minimum Material Requirement

To optimize efficiency, we require a minimum of six kiln runs' worth of material, approximately 3-4 tonnes of pruning residues, before we can agree to have one of our kilns on a land to produce Biochar.

Community Collaboration

We encourage neighboring landowners to collaborate by consolidating their wood waste at a single location to meet the required volume.

Members Benefits

By becoming a member of Sierra Preta, you’re not only gaining access to our kilns and expertise, but you’re also contributing to a larger mission of sustainable land management, renewable energy, and environmental conservation.

Democratic Participation

As a member, you can take part in the democratic decision-making process of Sierra Preta. Your voice matters in shaping the future of our association (participation is optional)

Training and Education

Learn the Biochar production process and become part of a community of like-minded producers.

Shared Resources

Access to our mobile kilns and equipment, maintained by our team for optimal performance

Research Projects

Participate in research initiatives exploring the role of Biochar in renewable energy production, water filtration, and other sustainability efforts

Download Application Form to Join Sierra Preta

Contact +34 624 204 166

Book a kiln now

How It Works

Choosing to rent one of our kilns allows you to keep all of the Biochar you produce and the choice to opt out of our membership yearly fee, providing flexibility for occasional users. You still receive training from our team on how to operate the kiln, and we organise the transport of our kilns to you land.

Kiln Delivery & Setup

We deliver and set up the kiln at your location for a fee of €90. This includes getting the kiln to your land and setting it up in the desired location and collecting the kiln once you have finished processing your feedstock.

Training & Support

Sierra Preta has a mandatory training fee of €110 for first-time users to guarantee safe and efficient kiln operation. A team member will assist you on your first kiln run to ensure correct operation.

Independent Operation

After the initial training, we’ll leave the kiln with you for as long as you need to process your wood residues. Our daily rate is €15. You’ll have the freedom to run the kiln as much as possible, operating it independently.

Keep all of your Biochar

This option to rent lets you keep all the Biochar produced during your rental period is yours to keep and utilize on your land.

No minimum Material Requirement

There is no minimum feedstock requirement, making it suitable for varying quantities of material.

What to Expect on Average:

Produce Around 500kg (2000L) of Biochar: On average, users can produce approximately 500kg of Biochar.

Cost for Processing a Year of Residues - €300: The estimated cost for processing a year's worth of residues is around €300.

Rent a kiln

How It Works

For those unable to transport their wood, we offer a collection service for a fee, depending how much material you have and your location. This service is perfect for busy individuals or those without access to suitable transport.

Cost

The service is priced at €25 per truckload (approximately 200kg of wood).

Receive Biochar

As a thank you, we provide a 50L bag of biochar per truckload for you to apply to your land.

No minimum Material Requirement

There is no minimum feedstock requirement, making it suitable for varying quantities of material.

Organise Pick-up Service

How It Works

If you have pruning residues or unwanted wood, you can deliver them to our permanent kiln location at no cost. There’s no minimum volume needed — perfect for those with smaller quantities of wood.

Where to Deliver

Our facility is located in the Río Seco area of Órgiva.

Process Costs Are on Us

Once your feedstock has been drop off, Sierra Preta will handle all processing costs associated with converting your wood into Biochar.

Receive Biochar

As a token of appreciation for choosing Biochar over open fires, you receive 20% of the produced Biochar, which can be picked up at the time of drop-off.

Important

Our facility is on private land and is not always open for drop-off. Please contact us to arrange a time.

No minimum Material Requirement

There is no minimum feedstock requirement, making it suitable for varying quantities of material.

Organise Drop-off time

Own Your Biochar Production System

Investing in your own kiln gives you complete control over Biochar production, allowing you to process organic residues at your convenience while enhancing soil health and carbon sequestration. Our kilns are designed for efficiency, durability, and ease of use, making them an excellent choice for individuals, farmers, and ecological projects.

Comprehensive Training Included

When you purchase a kiln from Sierra Preta, we ensure you know how to operate it safely and effectively. Our team provides hands-on training as part of the service, covering best practices for feedstock selection, firing techniques, and Biochar application.

Kiln Options & Pricing

We offer two kiln sizes to suit different needs and production capacities:

Standard Kiln (2.5m x 1m) – €1,500

Ideal for medium to large-scale Biochar production. Allowing you to process a substantial volume of feedstock in each batch. Suitable for farms, communities, and ecological initiatives.