Patent ID: 11884569
Assignee: BEIJING JIAOTONG UNIVERSITY
Field: Environmental technology (Chemistry)
Classification: CPC C  Y | IPC C

Claim 5:
6. The system for biological nitrogen removal and negative carbon discharge from wastewater with low carbon-to-nitrogen ratio according to claim 1, wherein a bottom outlet of the denitrification sedimentation tank is communicated with the autotrophic denitrification apparatus via a second sludge return pipe of the pipes, and a second sludge return pump is disposed on the second sludge return pipe; a fifth water outlet pipe of the pipes is disposed at an overflow opening of a top of the denitrification sedimentation tank; a wastewater outlet of the top of the denitrification sedimentation tank is communicated with a feed inlet of the integrated anaerobic ammonium oxidation apparatus via a wastewater return pipe of the pipes, and a wastewater return pump is disposed on the wastewater return pipe.