进行了几项小型研究，以评估强化混凝在控制氯化副产物方面的有效性，并评估混凝pH值预调整对TOC去除和工厂运营成本的影响。这些测试是在多种地表水源上进行的，包括德克萨斯州的三一河和休斯顿湖的混合水、加利福尼亚州的萨克拉门托河、明尼苏达州明尼阿波利斯市的密西西比河、大苏河、南达科他州、威瑟河、爱达荷州和堪萨斯州堪萨斯市的密苏里河。水源的TOC范围为2.0至11.0 mg/l。研究结果表明，铁基混凝剂（如三氯化铁）在去除天然有机物（NOM）方面始终比明矾更有效。当三氯化铁用作主混凝剂时，混凝pH值似乎是最大NOM去除率的决定因素。 通常，预先调整pH值为6.0±0.2时，NOM的总去除率将提高到65%，并将混凝剂剂量降低到60%。强化混凝导致整体运营成本上升；然而，通过减少混凝剂用量和污泥产量，用硫酸预调整pH值降低了成本。在所有情况下，pH值调整的强化混凝均实现了拟定D/DBP规则中概述的TOC降低百分比，作为原水初始TOC和碱度的函数。在大多数情况下，强化混凝也是一种可行的技术，可以将DBP形成的可能性降低到D/DBP规则中提出的MCL以下。

Several bench scale studies were undertaken to evaluate the effectiveness of enhanced coagulation in controlling chlorination byproducts and to assess the impact of coagulation pH preadjustment on TOC removal and plant operations cost. The tests were conducted on a variety of surface water sources, including a blend of the Trinity River water and Lake Houston water, Texas, the Sacramento River, California, the Mississippi River in Minneapolis, Minnesota, the Big Sioux River, South Dakota, the Weiser River, Idaho and the Missouri River in Kansas City, Kansas. The TOC of the water sources ranged from 2.0 to 11.0 mg/l. The results of the studies showed that an iron based coagulant such as ferric chloride, was consistently more effective than alum in removing natural organic matter (NOM). Coagulation pH appeared to be a determining factor for maximum NOM removal, when ferric chloride was used as a primary coagulant. Typically, preadjustment of pH at a value of 6.0 plus or minus 0.2 increased NOM overall removal to as much as 65 percent, and reduced the coagulant dose by up to 60 percent. Enhanced coagulation led to higher overall operating costs; however, preadjustment of pH with sulfuric acid reduced costs by reducing coagulant dose as well as sludge production. In all cases, enhanced coagulation with pH adjustments achieved the percent TOC reductions outlined in the proposed D/DBP Rule as a function of the raw water initial TOC and alkalinity. In most cases, enhanced coagulation was also a viable technique to reduce DBP formation potential below the MCLs proposed in the D/DBP Rule.