Biogasification, also called biomethanization, is the process of converting biomass to biogas, which can then be used as a fuel. One way to do this is through anaerobic digestion; another is by using high temperatures in a gasifier.

In a gasifier, sand (at about 1,500°F) surrounds the biomass and creates a very hot, oxygen-starved environment. These conditions break apart wood or other biomass and create biogas. This can then be cofired with wood (or other fuel) in a steam boiler or used to operate a standard gas turbine.