Modified AAO+Deep Bed Denitrification Filter Process Used in Upgrading Reconstruction of Wastewater Treatment Plant
A town in Chengdu is located in the key water quality control area of Mingjiang River.According to Discharge Standard of Water Pollutants in Minjiang River and Tuojiang River Basin in Sichuan Province(DB 51/2311-2016),it is necessary to upgrade and reconstruct two existing wastewater treatment plants in this area.The main process of technological reconstruction is to modify the former CASS tank into AAO+deep bed denitrification filter+high density sedimentation tank.After 2-year operation of completed project,it is found that the process is safe and reliable,and the effluent of the whole process reaches the standard stably.The cost of treating water per ton is 1.56 yuan/m3,which is better than that of the most WWTPs.
modified AAOdeep bed denitrification filterwastewater treatment plant(WWTP)upgrading reconstruction
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