Advanced denitrification process for kitchen wastewater

The invention discloses a deep denitrification process for kitchen wastewater. The deep denitrification process comprises a water inlet system; the denitrification biofilter is used for carrying out denitrification treatment on the wastewater in the water inlet system and is connected with a sedimentation tank, and the output end of the sedimentation tank is connected with an output system; the automatic carbon source adding system is positioned on one side of the water inlet system and is used for providing enough carbon sources for denitrifying bacteria; the compressed air system is connected with the denitrification biofilter; and the flocculating agent adding system is used for adding a flocculating agent into the settling tank. By fully utilizing the characteristic of wall-attached growth of denitrifying bacteria, infectious microbes or aged biological membranes are continuously eliminated, and the consumption of a carbon source on the infectious microbes or aged biological membranes is reduced, so that