Recently, "a biofilm denitrification carbon source screening method suitable for pond tail water treatment" invented by Li Zhifei and Xie Jun of the Pearl River Fisheries Research Institute of the Chinese Academy of Fishery Sciences was authorized by the Italian invention patent with the patent number of 10201900020198.

The phenomenon of insufficient supply of denitrifying electron donors in biofilm in aquaculture tail water treatment leads to low water treatment efficiency, which has become a restrictive link in the application of biofilm in tail water treatment. In order to effectively solve this problem, the team established a method to screen the enhanced carbon source of denitrification. Through a series of experiments such as separating anaerobic microorganisms on biofilm and determining the carbon source demand of anaerobic microorganisms, the team defined the carbon source type of anaerobic microbial denitrification electron donor in the treatment of aquaculture tail water, A biofilm denitrification carbon source screening method for pond tail water treatment was formed to effectively improve the denitrification and denitrification efficiency of biofilm.