因为氟化物对人体非常有效 减少龋齿，我们中的许多人 水供应商添加了这种化学物质 在治疗过程中 结果大约62%的美国人 人口目前接受氟化处理 水但很少有公用事业公司意识到 添加氟化物的点会产生 对处理过程的有害影响， 尤其是在去除颗粒方面 以及天然有机物。 一般来说，氟化物是在反应后添加的 水源已经通过了工厂的排水系统 理化过程训练与训练 在水进入清水井或完工之前 水库。当以这种方式添加时，氟化物 很可能不会对市场产生影响 发生在上游的处理过程。 然而，一项对为 信息收集规则发现 许多公用事业公司在一开始就添加了氟化物 治疗过程的细节。 实验室和中试规模研究的结果 涉及常规水处理 发现在典型的 强化混凝的处理厂， 氟化物在原料中的应用 水显著降低了总氮的去除 有机碳，降低了澄清器的性能 增加过滤浊度 突破，缩短过滤器运行时间，led 使成品水铝含量增加了十倍 注意力不集中，导致了损失 高达应用氟剂量的40% 因为吸附在絮状物上。鉴于这些 研究结果、实施预氟化的公用事业公司 可能需要评估是否含有氟化物 加法正在对语言产生负面影响 处理性能和成品水 质量包括28篇参考文献、图表。

Because fluoride is so effective in reducing dental caries, many US water suppliers add the chemical during the treatment process, with the result that some 62% of the American population currently receives fluoridated water. But few utilities may be aware that the point at which fluoride is added can have a deleterious effect on the treatment process, particularly with respect to removal of particles and natural organic matter. Generally, fluoride is added after the source water has passed through a plant's physicochemical process train and shortly before the water enters a clearwell or finished water reservoir. When added this way, fluoride is likely to have no influence on the treatment processes occurring upstream. However, a review of data compiled for the Information Collection Rule found that many utilities add fluoride near the beginning of the treatment process. Results from bench- and pilot-scale studies involving conventional water treatment found that under conditions typical for treatment plants practicing enhanced coagulation, application of fluoride to the raw water significantly reduced removal of total organic carbon, decreased clarifier performance and increased filtered turbidity breakthrough, shortened filter run times, led to a tenfold increase in finished water aluminum concentration, and resulted in a loss of up to 40% of the applied fluoride dose because of sorption to flocs. Given these findings, utilities that practice prefluoridation may need to assess whether fluoride addition is exerting a negative influence on treatment performance and finished water quality. Includes 28 references, figures.