Biological decolorizing method of melanoidin pigment

The invention discloses a biological decolorizing method of melanoidin pigment. According to the technical scheme, aspergillus tubingensis is used for decolorizing the melanoidin pigment. The biological decolorizing method comprises the following steps of: culturing a strain with preservation number of CGMCC No. 7174 for 3 to 5 days at the temperature of 29-31 DEG C so as to prepare the aspergillus tubingensis, then inoculating aspergillus tubingensis spore suspension into a melanoidin pigment liquid medium, and carrying out shake cultivation for 4 to 10 days under the condition of controlling the temperature at 30-50 DEG C, the pH at 3.0-8.0 and the rotating speed at 50-350rpm for decolorizing reaction. The biological decolorizing method can be used for directly decolorizing the melanoidin pigment and has the advantages of safety, effectiveness, mild conditions, little secondary pollution, environmental protection, economy and the like; the decolorizing rate of the melanoidin pigment can reach up to 75%; a good strain and biological treatment method is provided for practical industrial wastewater treatment.