Some examples of feedstock alternatives include
Further analysis and projections provided by PHG Energy will assist customers in determining likely uses for the small amount of biochar residue resulting from the downdraft gasification process. While such high-carbon content char is relatively small in volume, it has been shown to have economic value for soil conditioning and other applications where activated charcoal is required.
Dimensions: Between 3" and 1/8" (any direction).
Moisture Content: 30% by weight or less (wet basis)
Minimum Density: 14 lbs per ft3 (wet basis)
Heat Value: 6,520 btu/lb minimum, wet basis.
Minimum Biomass Content: 60% of the weight of the feedstock (dry basis)
Maximum non-volatile concentration (solids): 5% by weight (dry basis)