The invention discloses a method for extracting
succinic acid from
succinic acid fermentation liquor by using an
electrodialysis method, and belongs to the technical field of biochemical industry. According to the method, the
succinic acid is extracted by using the steps: the ordinary
succinic acid fermentation liquor is taken as a
raw material, deproteinization and decoloration are carried out through
thallus separation and
electrodialysis, and then denatrium, concentration,
crystal separation,
filtration and
drying are carried out in a bipolar membrane
electrodialysis mode. The light
transmittance of the
fermentation liquor after passing through an electrodialysis device is improved to be 95% from 15%, the decoloration effect is equivalent to that of
active carbon, the extraction rate is about 97-98%, and the yield of decoloration in an absorption mode is only 80-85%. Due to adoption of the method, the decoloration by using the
active carbon is changed, the absorption of the
active carbon on the succinic acid is avoided, and the loss of the succinic acid after the decoloration is avoided, so that the yield is increased; molecular succinic acid is obtained, and no
hydrochloric acid or
sulfuric acid is required to be used for adjusting the pH value of a
system, so that the purification on the succinic acid can be easily carried out; no organic solvents are used, so that residue of the organic solvents is avoided.