The invention discloses a method for producing
liquid fuel by using
biomass, and relates to the technical field of
clean energy production, the method for producing
liquid fuel by using
biomass comprises the following steps: step 1,
biomass raw material pretreatment, step 2, microbial
fermentation, step 3, separation and purification, and step 4, purification.
Biomass raw material residues, a microbial
fermentation agent,
liquid fuel, water, other incombustible micromolecular
organic matter liquid and the like are fully fermented in a reaction kettle, and
solid impurities and the liquid are separated through simple physical filtering operation; liquid fuel, water and non-combustible organic liquid are still contained in liquid obtained after
solid-liquid separation, and then the liquid fuel, the water and the non-combustible organic liquid are separated through comprehensive utilization of physical and
chemical separation and
purification methods, so that the purity of the liquid fuel is improved, and the problem that the
combustion process is insufficient due to the fact that the liquid fuel contains many impurities is solved.