MBR工艺水质净化效果的季节变化特性调研

Seasonal Change Characteristics of Water Purification Effect of MBR Process System

以太湖流域某城市4座污水处理厂的MBR工艺为研究对象,研究了季节性变化对MBR工艺净化城市污水的影响。结果表明:季节变化影响城镇污水处理厂进水水质、水温等,但MBR工艺运行相对稳定,主要出水水质指标均达到《城镇污水处理厂污染物排放标准》(GB18918—2002)的一级A标准;季节变化对COD和TP等水质指标无明显影响,对TN去除效果的影响无明显规律,但对硝化过程的影响较为明显。因此,各污水处理厂应在冬季采取相应的应对低温的强化措施。

The influence of seasonal changes on the MBR process for purification of municipal sewage was investigated in four WWTPs located in a city in Taihu Basin. The results showed that seasonal changes affected the influent quality and temperature of the WWTPs. However, MBR process operation was relatively stable, and the main effluent quality indicators reached the first level A criteria specified in the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant （ GB 18918 - 2002）. Seasonal changes had no obvious effect on the water quality indexes such as COD and TP, and the effect on the total nitrogen purification had no obvious law. However, the effect on the nitrification was obvious. Therefore, the WWTPs should take corresponding measures in response to low temperature in winter.