Extraction method for removing peculiar smell of feed-grade threonine product

The invention is applicable to the technical field of threonine extraction, and provides an extraction method for removing peculiar smell of a feed-grade threonine product, which comprises the following steps: sterilizing threonine fermentation liquor to obtain sterilized fermentation liquor; filtering the sterilized fermentation liquor by using a ceramic membrane to obtain a ceramic membrane dialysate; feeding the ceramic membrane dialysate into adsorption resin, and then deaminating to obtain deaminated liquid; feeding the deamination liquid into a decoloration and deodorization resin column for decoloration and impurity removal, wherein the decoloration and deodorization resin is Zhengguang SD333 resin; feeding is stopped when the feeding speed is controlled to be 2-3 BV/h and the light transmittance is 80%, the feeding volume multiple is 11-13 times, and effluent is obtained; and concentrating, cooling, crystallizing and drying the effluent to obtain a threonine finished product. In conclusion, the adsorb