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研究Mn2+质量浓度对亚硝化的影响,确定在Mn2+条件下实现亚硝化的运行参数.采用实际生活污水,pH控制在7.0～8.0,温度维持在28℃,DO质量浓度为1.0 mg/L.通过静态实验在不同Mn2+质量浓度(5、10、15、20mg/L)条件下,研究NH4+-N的去除效果和NO2--N累积效果.Mn2+质量浓度在5～10 mg/L时,NH4+-N去除率和NO2-N累积率稳定在80％以上.当Mn2+质量浓度超过15 mg/L时,NH4+-N去除率只能维持在60％以上,NO2-N累积率最低时只有21.157％.低浓度的Mn2+通过微生物所需微量元素形式促进亚硝化细菌的活性,但是高浓度的Mn2+会发挥其重金属离子的毒性作用,抑制亚硝化细菌的活性.“,”This paper aims to study on the impact of M n2+ on nitrosification to determine the optimum operating parameters of nitrosification at different Mn2+ condition.The experiment uses real life wastewater,under the condition ofpH value in 7.0～8.0,controlling temperature at 28 ℃,DO concentration was 1.0 mg/L.Using static tests investigated NH4+-N removal case and NO2--N accumulation case under the condition of different Mn2+ concentration (5,10,15,20 mg/L)and different COD mass concentration (50,100,150,200 mg/L).The NH4+-N removal rate and NO2--N accumulation rate was stable at 80％ respectively when the Mn2+ concentration was 5～10 mg/L.The NH4+-N removal rate only stable at 60％ and NO2--N accumulation dropped at 21.157％ when the Mn2+ concentration above 15 mg/L.The Mn2+ could accelerate the activity ofnitrosated bacterial by the trace of Mn2+ when the Mn2+ concentration was low,but organic carbon concentration is too high will inhibit the activity of nitrosated bacterial by the Mn2+ as heavy metal.