在实验室规模的实验中，对未经处理的地表水施加1.5和3.0 mg/L的二氧化氯剂量。随时间取样，测量二氧化氯残留物，以绘制所有实验条件下的衰减曲线。研究了TOC浓度、pH值和温度三个自变量对衰变率的影响。从文献中获得了0.5、1和2对数隐孢子虫灭活的二氧化氯CT要求。利用衰变数据，计算了达到每种灭活水平的CT要求所需的二氧化氯剂量。假设停留时间为60分钟，如果使用亚氯酸盐离子去除方法，二氧化氯似乎是0.5和1对数隐孢子虫灭活的可行替代方法。 由于所需的剂量和/或滞留时间非常高，因此对2对数隐孢子虫灭活似乎不实用。温度、pH值和TOC浓度都显著影响二氧化氯的衰变。TOC浓度似乎对初始氧化剂需求和衰变率有最显著的影响。亚铁离子的应用被证明是比添加亚硫酸盐离子更有效的亚氯酸盐离子去除工艺。

Bench-scale experiments were performed in which chlorine dioxide doses of 1.5 and 3.0 mg/L were applied to a raw surface water. Samples were taken over time and chlorine dioxide residuals were measured to develop decay curves for all the experimental conditions. The effect of three independent variables - TOC concentration, pH, and temperature - on decay rates was examined. Chlorine dioxide CT requirements for 0.5, 1, and 2-log Cryptosporidium inactivation were obtained from the literature. Using the decay data, chlorine dioxide doses needed to achieve the CT requirements for each level of inactivation were calculated. For an assumed detention time of 60 minutes, chlorine dioxide appears to be a feasible alternative for 0.5 and 1-log Cryptosporidium inactivation if a chlorite ion removal method is used. It does not appear to be practical for 2-log Cryptosporidium inactivation because of the very high doses and/or detention time required. Temperature, pH, and TOC concentration all significantly influenced chlorine dioxide decay. TOC concentration appeared to have the most significant impact on initial oxidant demand and decay rates. The application of ferrous ion proved to be a more efficient chlorite ion removal process than the addition of sulfite ion.