PROCESS FOR CONVERSION OF LIGNOCELLULOSE MATERIAL INTO ORGANIC ACID

• Main Authors: ROBERT REURD CHRISTOPHOR BAKKER, JOHAN PIETER MARINUS SANDERS
• Format: Patent
• Language: English; Japanese
• Published: 09.03.2017
• Subjects: BEER; BIOCHEMISTRY; CHEMISTRY; ENZYMOLOGY; FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIREDCHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERSFROM A RACEMIC MIXTURE; METALLURGY; MICROBIOLOGY; MUTATION OR GENETIC ENGINEERING; SPIRITS; VINEGAR; WINE

PROBLEM TO BE SOLVED: To provide a process for the conversion of lignocellulose into an organic acid for obtaining an organic acid in a high concentration, with a high yield and at a high purity.SOLUTION: A process comprise the steps of: a) pretreating a feed comprising a lignocellulose material with an alkaline agent comprising a divalent cation in the presence of water to obtain the aqueous slurry of the lignocellulose material; b) supplying at least part of the slurry of the lignocellulose material to a fermentation zone and subjecting it to enzymatic hydrolysis and fermentation in the presence of a microorganism to obtain a fermentation broth comprising an insoluble lignocellulose, the precipitated and dissolved salts of the organic acid by the divalent cation, and an enzyme; c) discharging fermentation broth obtained in step (b) from the fermentation zone; d) separating from the fermentation broth a liquid phase comprising the dissolved salt of the organic acid and a solid phase comprising insoluble lignocellulose and the precipitated salt of the organic acid; and e) recycling at least part of the liquid phase to alkaline pre-treatment step and/or to the fermentation zone.SELECTED DRAWING: Figure 1 【課題】有機酸を高い濃度でかつ高い収率及び高い純度で得る為の、リグノセルロースを有機酸に転化する方法の提供。【解決手段】ａ）リグノセルロース物質を含む供給物を水の存在下で、２価の陽イオンを含むアルカリ剤により前処理して、リグノセルロース物質の水性スラリーを得る、ｂ）上記リグノセルロース物質のスラリーの少なくとも一部を醗酵ゾーンに供給し、微生物の存在下で酵素による加水分解および醗酵に付して、不溶リグノセルロース、上記２価の陽イオンによる有機酸の析出した塩及び溶解した塩、及び、酵素を含む醗酵ブロスを得る、ｃ）工程（ｂ）で得られた醗酵ブロスを醗酵ゾーンから排出する、ｄ）上記醗酵ブロスから、上記有機酸の溶解した塩を含む液相と不溶リグノセルロースおよび上記有機酸の析出した塩を含む固相とを分離する、及び、ｅ）上記液相の少なくとも一部をアルカリ前処理工程及び／又は醗酵ゾーンに再循環する、ことを含む方法。【選択図】図１