这项研究的重点是提高慢砂滤池（SSF）的性能，尤其是， 使用砾石粗滤器（GRF）并添加臭氧或 凝固剂一系列SSF和GRF试验柱在一个高度有色的水域组装 在选定的配置中选择源以比较性能。有机前体的全面去除 对所选预处理方案的材料和过滤器运行时间进行了评估和比较。 此外，为了进行比较，采用嵌入式过滤器的慢砂过滤器的性能 还对颗粒活性炭层（含活性炭的SSF）进行了评估。包括3个参考文献、表格和图表。

This research study focused on enhancing slow sand filter (SSF) performance and, in particular, organic precursor removals using gravel roughing filters (GRF) with the addition of ozone or a coagulant. A series of pilot SSF and GRF columns were assembled at a highly colored water source in selected configurations to compare performance. Overall removal of organic precursor material and filter run times for the selected pretreatment options were evaluated and compared. In addition, for comparison purposes, the performance of a slow sand filter with an embedded layer of granular activated carbon (SSF with GAC) was also evaluated. Includes 3 references, tables, figures.