Biological treatment method of melatonin production wastewater

The invention provides a biological treatment method for melatonin production wastewater, which can solve the technical problems that the traditional adsorption and flocculation decolorization methods are high in decolorization agent cost and the decolorization effect needs to be further improved. The method comprises the steps that biological fermentation pretreatment is conducted on the melatonin production wastewater, bacteria adopted in the biological fermentation pretreatment comprise shewanella decoloring QCA2, the shewanella decoloring QCA2 is preserved in the China General Microbiological Culture Collection Center on November 17, 2020, and the preservation number of the shewanella decoloring QCA2 is CGMCC NO. The address of the preservation unit is No.3, Yard 1, Beichen West Road, Chaoyang District, Beijing, and the preservation number is CGMCC NO.21391. 本发明提供了一种褪黑素生产废水的生物处理方法，其能解决传统吸附、絮凝脱色，脱色药剂费用高，脱色效果也有待进一步提高的技术问题。本发明的该方法包括对褪黑素生产废水进行生物发酵预处理，所述生物发酵预处理采用的菌包括脱色希瓦氏菌（Shewanella decolorationis）QCA2，脱色希瓦氏菌