Big Box Biochar Kiln Operation and Best Practices
October 27th, 2023
The Utah Biomass Resources Group (UBRG) has scaled-up simple biochar kilns in an innovative approach to hazardous fuel reduction and biochar production using metal boxes, called Big Box kilns, that allow for in-woods biochar production. This article outlines Big Box biochar kiln operation and best practices.
Begin by loading the BB12 onto a trailer for transport, using either a mini excavator and chains or a four by four forklift using the fork pockets. Next, with the help of ratchet straps, with a breaking strength of over 1, 361 kilograms each, secure the kiln to the trailer. Proceed to unload the kiln, either by using the mini excavator or forklift, or by tying it to a tree or vehicle and driving away, allowing the kiln to fall to the ground.
At the site, use a pickup truck and straps to drag the kiln on skids. Next, place the BB12 on a flat surface near the wood pile, and ensure the dog door draining panel faces downhill if placed on a slope. Select feedstocks of any woody species, and use small, dry material to start the kiln, particularly when working with wet feedstock.
Gather an adequate amount of feedstock and cut it to lengths shorter than the maximum kiln dimensions for easy fitting. Then, construct a fire line around the kiln, ensuring the fire cannot escape. Make sure to have a charged hose with sufficient water supply on hand for fire control before starting the kiln, considering the current fire hazard.
Overview
The Utah Biomass Resources Group (UBRG) has developed an innovative method for hazardous fuel reduction and biochar production using Big Box kilns. This article details the operation and best practices for using these kilns in the field.
Key Study Components
Area of Science
- Biochar production
- Hazardous fuel reduction
- Innovative kiln technology
Background
- Biochar is produced from biomass through pyrolysis.
- Big Box kilns facilitate in-woods biochar production.
- Effective management of hazardous fuels is critical for forest health.
- Innovative approaches can enhance sustainability in biomass utilization.
Purpose of Study
- To outline the operation of Big Box kilns.
- To provide best practices for biochar production.
- To promote safe and efficient hazardous fuel reduction methods.
Methods Used
- Transporting the kiln using a mini excavator or forklift.
- Securing the kiln with ratchet straps for safety.
- Setting up the kiln on a flat surface near feedstock.
- Constructing a fire line and preparing for fire control.
Main Results
- Successful transport and setup of the Big Box kiln.
- Effective methods for selecting and preparing feedstock.
- Safety measures for fire control during operation.
- Guidelines for optimal kiln operation in various conditions.
Conclusions
- Big Box kilns are a viable solution for biochar production.
- Proper setup and safety measures are essential for success.
- Innovative approaches can improve biomass management practices.
