Simple Kiln Technology
Mobile pyrolysis is a novel approach to fuels reduction. The intermountain west has experienced a significant accumulation of forest fuels over time, creating hazardous conditions and extreme fire danger in some places. Removing excess fuels can reduce fire danger, however there are substantial costs associated with this practice of fuel removal and disposal. In response to this problem, the Utah Biomass Resource Group has spearheaded the use of multiple small, metal kilns as a way of removing forest fuels and making biochar - in a relatively low-cost way. These portable kilns have been used throughout Utah by a variety of people. To make biochar using these kilns, dry branches are stacked in the box, the pile is lit from the top, and as the material burns down, more wood is added until the kiln is nearly full of black carbon, or biochar. The volume of material leftover is eight times less than the originally woody feedstock. Eliminating the need to chip the wood before burning is one advantage this DIY technique has over the higher tech kilns which require the material to be chipped into a size less than a half inch; a costly step in the process.
The objectives of this project are to introduce a new method for making biochar that is portable, low-cost, and widely accessible. By introducing this technique to the Utah wildland fire community, arborists, Extension agents, loggers and landowners as a means of hazardous fuels reduction, the UBRG hopes to encourage the use of kilns for making biochar and as a result, reduce hazardous fuels in Utah.
Utah Forest Fact sheets
Kiln Related Research
Utah Prescribed Fire Smoke Study 2019-2020 Paul Corrigan, USDA Forest Service