强化混凝只能去除水中有限部分的天然有机物（NOM）。用粉末活性炭（PAC）补充强化混凝可提高NOM和消毒副产物（DBP）前体的去除率。在采用四种三氯化铁剂量和四种PAC剂量的jar试验矩阵中，对科罗拉多河水中总有机碳（TOC）和DBP前体的去除进行了评估。根据使用的化学药剂剂量，估算了每种混凝剂和PAC添加组合的成本。进一步的结果进行了讨论。包括16个参考文献、表格和图表。

Enhanced coagulation can remove only a finite fraction of the natural organic matter (NOM) in water. Supplementing enhanced coagulation with powdered activated carbon (PAC) increases the removal of NOM and disinfection by-product (DBP) precursors. The removal of total organic carbon (TOC) and DBP precursors from Colorado River water was evaluated in an experimental matrix of jar tests using four ferric chloride dosages and four PAC dosages. On the basis of the chemical dosages used, the cost of each combination of coagulant and PAC addition was estimated. Further results are discussed. Includes 16 references, tables, figures.