寒冷地区城市污水处理厂改进工艺的运行效能

 为了提高传统活性污泥法的处理水平,在大庆乘风庄污水厂,通过调整曝气池第一廊道曝气量,造成缺氧,形成无内回流A/O工艺,考察了曝气池经简易改造后的污染物,尤其是营养盐的去除效果,并对曝气池中的污泥特性,特别是冬季发生污泥膨胀的原因进行了分析.结果表明,该工艺可明显地提高其氮磷去除水平.冬季发生的污泥膨胀除与低氧低负荷有关外,低温也是原因之一.

Performance of a modified municipal wastewater treatment plant in cold region.

In order to improve the treatment level of conventional activated sludge process in the wastewater treatment plant(WWTP) of Chengfengzhuang in Daqing, the number of aerator in the first aeration basin was adjusted to form lack of oxygen resulting in an A/O process without internal recirculation so as to study the effectiveness of pollutants removal, especially nutrients removal, after the aeration basins of the plant were modified with a simple method. The characteristics of the activated sludge in the aeration basins and especially the reason for sludge bulking in winter were analyzed. The results show that nutrient removal can be improved. In addition to low oxygen and organic loading, the low temperature is also a reason for the sludge bulking occurred in winter.