组合式A^2/O工艺处理城市污水的实验研究

Experimental Study on the Reuse for Scenic Water in Urban Sewage Treatment Plant by the Combinated Process of A_2/O Treatment

随着城市化进程的加快,城市综合治理与城市水环境保护已逐渐为人们重视。通过试验,对A2/O工艺进行改进,在传统型A2/O工艺的好氧池中充填填料,形成推流式的生物接触氧化曝气池,即组合式A2/O工艺,用该工艺处理城市污水,其出水水质(平均值)为:COD 36.9 mg/L、NH3-N 3.3 mg/L、TP 0.39 mg/L,符合《城镇污水处理厂污染物排放标准》(GB18918-2002)一级A标准,可排入稀释能力较小的河湖,用作景观用水和一般回用水。出水水质与《城市污水再生利用景观环境用水水质》标准(GB/Tl892 l-2002)相比,有一定差距,还需进一步的处理。

With the accelerated process of urbanization, the city＇s comprehensive urban water treatment and environmental protection has gradually been attention. Through experiments, the A2/O technology improvements, in the traditional A2/O process of filling fill aerobic pool, a push - flow of contact with the biological aeration tanks. That is modular A2/O technology, with this treatment of urban sewage with combinated process of A2/O were reused for scenic water. The experiment results indicate that：the average concentration of chemical oxygen demand and ammonia nitrogen and total phosphorous and turbidity of flow water is 36. 9 mg/L and 3.3 mg/L and 0. 39 mg/L. The quality of outlet water of the experiment meets the 《（Standard for Discharge of Wastewater GB18918 -2002》＇s A standard of stair, and can be drained into the river or the lake, whose dilutedness ability is lesser, and be used for scenic water and common reuse water. Comparede with the 《（Reuse of Urban Recycling Water - Water Quality Standard for Scenic Environment Use GB/18921 -2002》, the quality of outlet water of the experiment is difference, and need the further disposal.