间歇曝气生物滤池长运行周期下的除磷性能研究

Study on Phosphorus Removal Performance by Intermittent Aerated Biofilter during Long Operation Period

采用厌氧预酸化—间歇曝气生物滤池处理生活污水,考察了长运行周期下间歇曝气生物滤池的除磷性能。结果表明,采用周期性排除厌氧富磷液的方法,可有效减缓生物膜中磷的积累,从而延长了反应器的运行周期,降低了反冲洗频率。在长运行周期下,间歇曝气生物滤池的除磷性能良好,但长期在低进水碳源浓度下运行时,会对系统的生物除磷性能产生不利影响。

The anaerobic preacidification/intermittent aerated biofilter （IABF） was used for domestic wastewater treatment. The phosphorus removal performance by IABF during the long operation period was investigated. The results show that periodic removal of anaerobic phosphorus enrichment liquid can reduce phosphorus accumulation in biofilm effectively. Thereby, the operation duration is prolonged, and the backwashing frequency decreases. During the long operation period, the phosphorus removal is effective except when continuously operated with low carbon concentration in the influent.