改良AAO+深床反硝化滤池工艺用于污水处理厂提标改造

Modified AAO+Deep Bed Denitrification Filter Process Used in Upgrading Reconstruction of Wastewater Treatment Plant

摘要:

成都平原某镇地处岷江流域水质重点控制区域，按照《四川省岷江、沱江流域水污染物排放标准》（DB 51/2311—2016），需对该地现状2座污水处理厂进行提标技术改造。技改主体工艺是将原CASS池改良为AAO+深床反硝化滤池+高密度沉淀池，建成运行2 a后发现，该工艺安全可靠，全流程出水稳定达标，处理吨水成本1.56元/m3，优于大部分污水处理厂。

Abstract:

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.