Method for recovering sugar solution prepared by saccharification of biomass

A method for recovering a sugar solution prepared by saccharification of biomass, comprising:

• a biomass saccharification products production step of carrying out saccharification of pretreated biomass with an addition of acids or saccharification enzymes;
• an aggregation of fine particles step of adding a protein additive for aggregation of saccharification residues to the saccharification products of biomass and mixing to prepare a slurry containing aggregated fine particles;
• and
• a sugar solution recovery step of separating a sugar solution by centrifugation or filtration of the slurry containing aggregated fine particles;
• wherein the protein additive for aggregation of saccharification residues in a form of a suspension includes at least one additive selected from a group consisting of soy protein isolated, soy protein concentrate, and soy flour.