Abstract: A plant processing system of the present invention includes: a plant cultivation facility (1) which cultivates plants including a sugar solution; a crushing facility (2) which crushes plants felled in the plant cultivation facility (1); a juicing facility (3) which harvests sap from plant chips obtained by the crushing facility (2); a methane fermentation facility (5) which performs a methane fermentation process on the sap; and a power generation facility (6) which generates electric power using a biogas obtained by the methane fermentation facility (5) as a fuel.

Abstract: A liquid fuel production method of the present invention includes: a saccharification step in which a biomass is saccharified; a methane fermentation step in which a saccharified liquid acquired in the saccharification step undergoes methane fermentation; and a biogas to liquid (BTL) step in which a liquid fuel is generated from a biogas acquired in the methane fermentation step.

Abstract: The present invention is a cellulose-based biomass juicing method in which a cellulose-based biomass is chipped, and the cellulose-based biomass is juiced after a predetermined pre-treatment is performed on the cellulose-based biomass, wherein the pre-treatment is a mechanical treatment in which parenchyma constituting the cellulose-based biomass is crushed.