Method for extracting active ingredients in threonine fermentation concentrate

The invention provides a method for extracting active ingredients in threonine fermentation concentrate. Waste can be turned into treasure through the method. The method comprises the key points of: adding an extractant ethanol at a mass ratio of 10-150% into the threonine fermentation concentrate, wherein the purity of the extractant ethanol is analytical pure; performing stirring at a medium speed for 5-30 min so as to achieve thorough mixing of the concentrate with the extractant, and putting the mixture in a thermostatic water bath at 20-50 DEG C, wherein the placing extraction time is 0.5-8 h; performing laboratory suction filtration with 200 mesh polyester filter cloth as a filter medium, retaining a filter cake, and drying the filter cake. The method has the advantages that: the waste can be turned into treasure, produced inorganic salts are subjected to a recrystallization process so as to obtain ammonium sulfate of a certain mass, and the obtained ammonium sulfate can be soldon the market; after extr