采用完全混合活性污泥法研究了大生活用海水进入城市污水系统后,海水盐度对曝气池中NH₃—N去除率的影响,同时研究了不同海水盐度下,温度、pH值的变化对NH₃—N去除率的影响。实验结果表明,污水中海水占 1 2 %时,对曝气池中NH₃—N的去除率无太大影响;但是当提高到 2 4 %时,NH₃—N去除率有所降低;海水盐度达 36%时,NH₃—N去除率明显降低。温度的升高,有利于去除NH₃—N,尤其是高海水盐度下,温度的影响更为明显。海水存在时,脱除氨态氮的最适宜pH值为 8 0～ 8 5。

The effects of salinity variations, temperature and pH value on the removal efficiency of NH₃—N have been investigated in the complete-mixing activated sludge system after the domestic seawater flowed into the urban sewage system.With the salinity increasing the removal efficiency of NH₃—N drops.With the temperature increasing the removal efficiency of NH₃—N is improved.The suitable pH value of nitrification is 8.0 ～ 8.5 when the seawater salinity is high in the wastewater.