Centre for Water Sensitive Cities and Department of Civil Engineering, Monash University, Building 60, VIC 3800, Australia.
Water Sci Technol. 2012;66(5):1132-8. doi: 10.2166/wst.2012.283.
Biofilters are common, low energy technologies used for the treatment of urban stormwater. While they have shown promising results for the removal of stormwater microorganisms, certain factors affect their performance. Hence, this study investigated the effects of particle-microbial interaction, inflow concentration, antecedent microbial levels and plant species on microbial removal capacity. A biofilter column study was set up to evaluate removal performance and a sequential filtration procedure was used to estimate microbial partitioning. The columns were dosed with different concentrations of free phase Escherichia coli only and E. coli mixed with stormwater sediment. Results indicate that the microbial removal is significantly affected by inflow concentration and antecedent microbial levels. Leaching was only observed when a relatively low inflow concentration event occurred within a short period after a very high inflow concentration event. Finally, Lomandra longifolia showed better removal compared with Carex appressa.
生物滤池是一种常见的低能耗技术，用于处理城市雨水。虽然它们在去除雨水微生物方面表现出了良好的效果，但某些因素会影响它们的性能。因此，本研究调查了颗粒-微生物相互作用、进水浓度、前期微生物水平和植物种类对微生物去除能力的影响。建立了一个生物滤池柱研究来评估去除性能，并使用顺序过滤程序来估计微生物分配。这些柱子被注入不同浓度的游离相大肠杆菌和大肠杆菌混合雨水沉积物。结果表明，微生物的去除受到进水浓度和前期微生物水平的显著影响。仅当在非常高的进水浓度事件后很短的时间内发生相对较低的进水浓度事件时，才会观察到浸出。最后，与牛筋草相比，长叶水葱表现出更好的去除效果。
