三峡库区污水处理厂的污泥膨胀及恢复运行

Research on Sludge Bulking and Recovering of Wastewater Treatment Plant in Three Gorges Reservoir Area

针对三峡库区污水处理厂冬季极易产生污泥膨胀的实际运行情况,以长寿污水处理厂为例,对其原因进行了分析,提出了投加生石灰/絮凝剂和厌氧/闷曝两种不同的系统恢复方法。实际运行结果表明,两种方法均能有效地控制污泥膨胀现象,但生石灰/絮凝剂法更为有效,可以在最短的时间内使系统得到恢复。

Taking Changshou WWTP for example, the reasons of sludge bulking occurred in WWTP in Three Gorges reservoir area in winter are analyzed, and two technologies to recover the activated sludge system are put forward, which are adding calcium oxide with flocculant and anaerobic treatment plus aeration. The operation result shows that these two technologies can control sludge bulking effectively, especially the first one can recover the system within the shortest time.