在科林斯堡（科罗拉多州）水处理设施进行了中试规模实验，以优化混凝过程，以处理春季融雪径流，其特点是总有机碳（TOC）浓度升高、碱度低和浊度相对较低。该过程包括在快速混合之前调整碱度和pH值（使用石灰和二氧化碳），然后在两个位置添加明矾，间隔约30秒的停留时间（两阶段凝固）。为了优化石灰和二氧化碳的剂量，进行了中试实验，以优化凝固后的pH值和碱度目标。中试实验还旨在进一步评估两阶段混凝，包括与单阶段添加明矾的比较，其中总明矾剂量应用于一个返混式反应器或一个在线混合器。包括5个参考文献、表格和图。

Pilot-scale experiments were conducted at the Fort Collins (Colorado)Water Treatment Facility to optimize a coagulation process to treat spring snowmelt runoff water that is characterized by elevated total organic carbon (TOC) concentrations, low alkalinity, and relatively low turbidity. The process consists of alkalinity and pH adjustment (using lime and carbon dioxide) prior to rapid mix, followed by the addition of alum at two locations separated by approximately 30 seconds of detention time (two-stage coagulation). The pilot experiments were conducted to refine the post-coagulation pH and alkalinity targets in order to optimize the lime and carbon dioxide doses. The pilot experiments were also designed to further evaluate two-stage coagulation, including comparisons to single-stage alum addition where the total alum doseis applied to either one backmix-type reactor or one in-line mixer. Includes 5 references, tables, figures.