Method and device for treatment of municipal sewage by whole-process anaerobic ammonia oxidation enhanced nitrogen removal AOA technology

• Main Authors: XU ZAIZHOU, ZHANG QIONG, LI XIYAO, GAO XINJIE, PENG YONGZHEN
• Format: Patent
• Language: Chinese; English
• Published: 09.08.2019
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

Belonging to the field of sewage treatment and reclamation, the invention provides a method and device for treatment of municipal sewage by whole-process anaerobic ammonia oxidation enhanced nitrogenremoval AOA technology. The device mainly consists of a sewage raw water tank, an AOA reactor and a sedimentation tank. Sludge flows back from the bottom of a secondary sedimentation tank to an anoxiczone and an anaerobic zone respectively, and biofilm filler is added into the AOA reactor. Sewage enters the AOA reactor, and an internal carbon source is accumulated in the anaerobic zone sludge toremove organic matters from the raw water. Then the sewage enters an aerobic zone for nitration reaction, the generated nitrate nitrogen enters the anoxic zone for endogenous denitrification, the anaerobic ammonia oxidation filler in the AOA reactor utilizes the nitrite nitrogen produced in the nitration-denitrification process and the residual ammonia nitrogen in raw water for anaerobic ammonia oxidation reaction, thus rea