曝气生物滤池快速启动和活性保持性能研究

Quick Start-up Process and Activity-keeping in Biological Aerated Filter

研究了两级曝气生物滤池处理生活污水时各级的快速启动和在低负荷下活性保持的能力,考察了出水中主要污染物和生物滤池内生物量随时间的变化情况。结果表明,碳氧化生物滤池从低负荷恢复时,所需要的时间与活性保持时的负荷大小有关,负荷越小,所需要的时间越长。在极端情况下,恢复时间接近一次完全启动的时间,因此碳氧化生物滤池的低负荷维持并没有太大的实际意义。而硝化生物滤池在低负荷下活性保持良好,重新启动仅需要完全启动1/10的时间,这就有可能以低成本实现硝化生物滤池的活性保持。

The quick start-up process and sustain of activity in biological aerated filte(BAF) are studied. Results showed that it has a cause and effect relationship between the loading and activity when BAF recovers at low loading status. The lower the loading is, the more time it costs for recovering. At the extreme situation, the time of recovering nearly equals to the time for a whole start-up, which indicated that it is useless to keep activity in a BAF whose function is removing organic contaminants. In a BAF whose function is removing ammonium nitrogen, the activity is kept well on a low loading, and it costs only one-tenth of the time to restart, which means it would be an economical way to sustain the activity of the BAF.