【摘要】 渗流式生物床的成功启动是稳定发挥其净化污染河水功能的重要前提。研究表明,渗流式生物床的自然启动约需40 d,而减少进水负荷同时投加营养物则能够有效加快渗流式生物床的启动,启动时间仅约12 d。当启动完成并稳定运行时,在HRT为8 h的条件下系统对NH4+-N的平均去除率为94.4%,对COD的平均去除率为51.3%;当HRT为24 h时系统对NH4+-N的平均去除率为98.3%,对COD的平均去除率为53.5%。可见,当水力停留时间达到8 h后,增加水力停留时间对提高NH4+-N和COD去除率的效果不明显。更多还原

【Abstract】 Successful start-up is an important precondition for Seepage Biological Bed（SBB） to purify polluted river water steadily.The research shows that the natural start-up of SBB needs about 40 days and the rapid start-up only needs about 12 days.The rapid start-up method is to reduce the influent hydraulic load and at the same time to add nutrition which can effectively accelerate the start-up speed of SBB.When start-up is achieved,in the condition of 8-hour HRT,the average removal rate of NH⁺₄-N is 94.4%,COD is 51.3%,and in the condition of 24-hour HRT,the average removal rate of NH⁺₄-N is 98.3%,COD is 53.5%.The results of removal performance show that when HRT is more than 8 hours,increasing the HRT has little effect on increasing removal rate of NH⁺₄-N and COD.更多还原