The multi-stage AO+MBR process was used to upgrade the problems of effluent TN fluctuation and low discharge capacity of tailwater in a wastewater treatment plant in cold area of north China.Multi-stage AO can achieve efficient removal of TN,and MBR+ozone catalytic oxidation can achieve effective control of COD and NH3-N,so as to achieve the purpose of stable effluent.After the upgrading reconstruction the actual operating data show that:The mean values of NH3-N,TN,COD,TP and SS in effluent were 0.29 mg/L,7.59 mg/L,26.60 mg/L,0.38 mg/L and 5.32 mg/L,respectively.All of them meet the Class A standard of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant(GB 18918-2002),among which NH3-N meets the Class Ⅲ water standard in the Environmental Quality Standard for Surface Water(GB3838-2002)(ρ(NH3-N)≤1.0 mg/L).TN stability is better than the Class A standard of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant(GB 18918-2002)(ρ(TN)≤15 mg/L).
关键词
提标改造/多段AO+MBR工艺/寒冷地区/城市污水厂
Key words
upgrading and reconstruction/multi-stage AO+MBR process/cold areas/urban wastewater treatment plants
维普
万方数据