New mobile biochar retort south africa

BKI have been investigating and building Portable Kilns since 2011. We are happy to announce that BKI has finally located a bona fide Mobile Pyrolysis Unit that checks all our boxes of what a Mobile Retort should represent in reality.

This unit is completely mobile – in contrast with our low-tech RING17, RING20 and BKI MINI MASON models.  Many clients have asked for a more high-tech option/solution that can produce wood vinegar and this model certainly does that and more. 

Capacity/Yield: The unit holds 1.5 M3 of biomass and converts it into valuable products such as biochar, bio-oil and wood vinegar. No need for quenching, so it’s very light and easy to work with. Expressed differently, the unit produces 200 kg biochar per run/day depending on type of feedstock, moisture content and particle size.

Wood Pellet Conversion: Special wire cages are being developed to accommodate “difficult” feedstock types such as wood pellets, shavings, sludge, bagasse, agri-waste such as Macadamia nut shells etc.

Wood Vinegar: Recent trials have produced 5 Litres of wood vinegar per burn cycle, depending on feedstock type and moisture content. The wetter the feedstock, the more wood vinegar is lost trough the stack.

Note: The weight of biomass can vary from softwood, hardwood logs to bamboo, and moisture content also varies. Depending on size of limbs and air gaps between branches it is better to talk in terms of volume only, and biochar can weigh more on a humid day. Often times clients prefer biochar to be mixed with water in order to inoculate it and protect the microorganisms so weight will vary. Due to the presence of water, and evaporation that occurs naturally and for the sake of consistency, biochar should never be sold on a weight basis.

Co-firing: It comes equipped with an LPG connection to start the fire in the firebox but LPG is just an optional extra ‘nice to have’.

Mobility: The unit is fitted with castors. A custom-built trailer is an optional add-on.

-4m x 1.8M (2.5 Ton) 225/15 wheels +1 spare wheel
-Fixed sides and front 300mm with 300mm rear drop sides
-4 x fixed footings
-60mm double jockey wheel
-Manual Winch with stainless steel cable
-2 x Loading Ramps

License: The design is under international copyright

Support: The unit comes with an Operating Manual, Assembly instructions, Maintenance tips and a Run procedure.

International delivery / Export: We export all over the world – see for more pictures.

CAD plans are available from the Australian inventor for those interested in licensed out production and country specific copyright protection.

Delivery time: 5 weeks

Cost: If anyone would like a quotation (local or international) please get in touch. OR fill in the order form here or scroll to the bottom of this page.

Introductory video: 

Contact: Kobus WhatsApp


Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s