Pilot study on the start-up and advanced nitrogen removal of AOA process under low temperature
A skid-mounted AOA pilot plant with a capacity of 50 m3/d was designed and con-structed at the Jiangbian WWTP Phase Ⅰ & Ⅱ project in Changzhou.The nitrogen removal effi-ciency of AOA process start-up and stable operation under low temperature conditions in winter were verified and studied.AOA process has been affected by low temperature and temperature plummets both in start-up stage and in stable operation stage,Compared to the current plant with AAO process of Jiangbian WWTP Phase Ⅰ & Ⅱ project,which met the effluent quality standard under low temperature of 11～18 ℃ by adding external carbon sources,the pilot plant still achieved 5.51 mg/L of average total nitrogen concentration in effluent,and 83.16％of average removal rate without external carbon sources,much better than the effluent quality standard of Jiangbian WWTP.It shows that AOA process has considerable superiority in nitrogen removal under low-temperature conditions.
Low temperatureTemperature plummetsAOA processAdvanced nitrogen re-movalPilot-scale study
万方数据
维普
