Patent ID: 11905194
Assignee: ZHEJIANG HAIHE ENVIRONMENTAL TECHNOLOGY CO., LTD.
Field: Environmental technology (Chemistry)
Classification: CPC C  Y | IPC C

Claim 4:
5. The denitrification treatment system for the wastewater by the A2O based on the high-oxygen three-phase contact according to claim 4, wherein the sludge sedimentation reflux clean water discharge device comprises a sedimentation cylinder, a first communication pipe with a communication pipe first end fixedly connected with a water exit of the nitrification liquid shunting tank and a communication pipe second end fixedly connected with a central cylinder is arranged in a middle of the sedimentation cylinder, a bottom of the sedimentation cylinder is provided with a sludge discharge pipe with a sludge pipe first end fixedly connected with a sludge discharge port of a sludge hopper and a sludge pipe second end passing through the sludge sedimentation reflux clean water discharge device, the annular nitrification liquid anoxic nitrification device, and the annular anaerobic treatment device and then connecting with a sludge discharge control valve; the central cylinder, a conical water baffle and an annular peripheral overflow tank are arranged in the middle of the sedimentation cylinder, a bottom of the annular peripheral overflow tank is provided with a clean water discharge pipe port; and the clean water discharge pipe port passes through the sludge sedimentation reflux clean water discharge device, the annular nitrification liquid anoxic nitrification device, and the annular anaerobic treatment device and then is connected with a standard discharge port.