机械搅拌对CANON污泥快速颗粒化的影响

采用单纯依靠曝气的SBR反应器(R1)与曝气和机械搅拌联合的SBR反应器(R2),研究了不同控制方式对CANON污泥颗粒化的影响.结果表明,R2仅用40d即成功实现颗粒化,比R1用时减少三分之一;颗粒化期平均总氮去除率为83.07%,平均总氮容积负荷为0.26kg N/(m3·d),比R1脱氮效果更加稳定高效,证实了机械搅拌有利于提高粒径增长速率及脱氮能力.采用曝气和机械搅拌联合方式可有效缩短CANON污泥颗粒化的时间,并能实现稳定高效的总氮去除,是CANON污泥颗粒化的有效手段.

Influence of mechanical stirring on the rapid granulation of CANON sludge

Effect of different control modes on the granulation of the CANON sludge were studied with the aeration SBR reactor (R1) and aeration combined with mechanical stirring SBR reactor (R2). R2 granulation used 40 days, a third shorter than R1; the mean TN removal efficiency and volume loading of R2 was higher and more stable than R1, which was 83.07% and 0.26kgN/(m3·d), which confirmed the mechanical stirring will improve the particle growth rate and nitrogen removal performance. This research demonstrated that aeration combined with mechanical stirring was an efficient method to shorten the granulation time of the CANON sludge and achieve stable and high removal of TN.