Biochar is a fine-grained charcoal left behind after pyrolysis of crop residues, livestock manures, or other organic materials. Pyrolysis is the high-temperature processing of organic materials in the absence of oxygen.
Biochar is used in multiple applications, including as a soil amendment and in sewage and wastewater treatment. Researchers have found that biochar applied to wet soils can decrease the production of methane and nitrous oxide. Other research has shown that biochar can be useful for restoring degraded soils because of its ability to bind to heavy metals.
State agencies and local governments must consider whether biochar products can be used when planning government-funded projects or soliciting and reviewing bids for such projects. Biochar means a carbon-rich material produced during the pyrolysis process. If biochar products can be used in the project, a state agency or local government must use biochar products unless:
A state agency is not required to use biochar products if:
PRO: The state should encourage the uses of biochar to see if it can be a successful approach to enhance plant growth and suppress methane. By encouraging the cultivation of biochar in government contracts, it may help develop this approach. Biochar can sequester carbon back in soil, and is renewable. The state can help build the market and encourage the use of biochar. A project to recycle timber products in the Olympic Peninsula to create biochar could create many jobs. The definition of biochar should be modified to match the international definition, to include gasification.