曝气生物滤池处理玄武湖原水的实验研究

Experimental Study on Biological Treatment of Eutrophic Raw Water of Xuanwu Lake Using Aerated Biological Filter

南京玄武湖水体属富营养化水体，为此，采用曝气生物滤池对玄武湖原水进行生物处理的实验研究。结果表明，经过生物处理后，出水的氨氮、CODMn可达到《地面水环境质量标准》中Ⅲ类水体水质标准。在环境温度条件下，供氧充足时，调节HRT为60min进行原水自然挂膜，运行13d挂膜成功。在生物膜成熟后，调节HRT改变工况运行，在HRT为25min时，运行效果最佳，氨氮和CODMn去除率的平均值分别达94．9％和26．0％。因此，在作为饮用水源情况下，应用曝气生物滤池处理玄武湖原水是改善其水质的可行方法。

The water of Nanjing Xuanwu Lake is eutrophic. The aerated biological filter （ABF） was used to treat the raw water of Xuanwu Lake. The results showed that the concentrations of ammonium-nitrogen and CODMn cowd meet the water quality standards （class three） of＂Environmental Quality Standards of Surface Water＂ after the treatment. Under the condition of ambient temperature and sufficient supply of oxygen, the biofilm colonization using raw water as inoculation was studied. The startup needed 13 days with HRT of 60 min. Different HRT cases were performed in the stage of steady operation. The optimal HRT was 25 min, and the average removal rates of ammonium-nitrogen and CODMn were 26.0% and 94,9% respectively. When the raw water of XuanWu Lake is regarded as drinking water source, its quality can be improved by ABF.