本powerpoint演示文稿首先简要概述Edwards DWF。问题包括: 需要去除的总有机碳（TOC）； 配送系统中的高消毒副产物（DBPs）；和 春季径流治疗的挑战。介绍了THMs和HAA5的监管要求，以及粗滤的原因。试点研究目标包括: 春季径流期间的测试； 关注粗滤性能和 水质； 试验铁和明矾作为替代混凝剂；和 测试“高速率”HLR。提供了Jar测试结果，以及混凝剂、中试装置示意图、中试过滤介质设计、中试过滤器中的颜色去除和中试过滤器浊度总结。调查结果摘要包括: 三价铁对溶解性有机碳（DOC）去除效果好，出水浊度好，能满足THM和HAA MCLs的要求； 过滤出水浊度高于预期；而且，明矾的表现也不好。包括表格、数字。

This powerpoint presentation begins by providing a brief overview of the Edwards DWF. Issues include: total organic carbon (TOC) removal required; high disinfection byproducts (DBPs) in the distribution system; and, spring run-off treatment challenges. Regulatory requirements for THMs and HAA5 are presented, along with reasons for roughing filtration. Pilot study objectives included: testing during spring run-off; focus on roughing filtration performance and water quality; test ferric and alum as alternative coagulants; and, test "high rate" HLRs. Jar testing results are provided, along with coagulants, pilot plant schematic, pilot filter media design, color removal in pilot filters, and pilot filter turbidity summary. Summary of findings includes: Ferric - worked well for dissolved organic carbon (DOC) removal, good settled water turbidity, could meet the THM and HAA MCLs; higher filter effluent turbidities than expected; and, alum didn't perform well. Includes tables, figures.