两种运行方式下的间歇曝气生物滤池除磷特性

厌氧间歇曝气生物膜系统用于生活污水的生物除磷。研究了运行方式对间歇曝气生物滤池除磷性能的影响。结果表明,与序批运行方式相比,ACF(aerobic continuous feeding)运行方式可以有效提高生物膜除磷系统的净吸磷能力,采用不同于传统反冲洗方法去除生物膜中富集的磷,可以使间歇曝气滤池在长周期条件下保持良好的运行性能,减少滤池的反冲洗频率。ACF方式下,有机物与磷酸盐的分布及变化特征表明间歇曝气池内可能存在着微生物不同种群的空间分布。

Characteristics of phosphorus removal in an intermittent aerated biofilter under two operating regimes

A fixed-film system composed of an anaerobic biofilter and an intermittently aerated biofilter(IABF) was developed for enhanced biological phosphorus removal(EBPR) in the treatment of domestic wastewater.We investigated the influence of the operating regime on the performance of EBPR in IABF.Compared to the sequencing batch regime,net phosphorus-uptake capacity in IABF was improved under the aerobic continuous feeding(ACF) regime.An innovative method that can be used instead of traditional backwashing was applied to IABF for removal of phosphorus from the reactor under the ACF regime.Using this method,a stable performance of EBPR was achieved during long-term operation,with a low frequency of backwashing in IABF.Distribution and variation of organic and phosphorus in IABF may imply spatial distribution of microorganisms in the column of the reactor under the ACF regime.