将溴酸盐作为一个规定参数，内华达州南部供水系统（SNWS）开展了一项试点测试计划，以验证隐孢子虫失活2对数时溴酸盐的形成，并调查可能的溴酸盐缓解技术及其对生物活化过滤的影响。试验的前三个月评估了三种溴酸盐缓解技术，即添加少量预氯、添加少量前氨，以及预氯和前氨的组合。结果表明，当添加臭氧以产生2%的溴酸盐时，溴酸盐的生成可能会超过提议的10 ppb的MCL- 日志加密失活，未使用缓解技术。无需缓解技术，可通过将失活降低至约0.75-log以达到5 ppb的项目目标，并将失活降低至约1.0-log以达到MCL，从而减少溴酸盐的形成。与无缓解技术相比，添加少量预氯并没有显著减少溴酸盐的形成。然而，在2对数加密失活时，添加预氨以及添加预氯和预氨的组合确实显著地将溴酸盐的生成减少到5 ppb。虽然剂量为0。 为了达到溴酸盐目标，仅需要5 mg/L的氨，然后添加0.5 mg/L的预氯胺，使氨的剂量降低到0.1 mg/L，并且仍然达到5 ppb的目标。包括2个参考文献、表格和图表。

With the inclusion of bromate as a regulated parameter, the Southern Nevada Water System (SNWS) has undertaken a pilot testing program to verify the bromate formation at 2-log Cryptosporidium inactivation and to investigate possible bromate mitigation techniques and its effect on biologically activated filtration. The first 3 months of the pilot evaluated three bromate mitigation techniques, the addition of a small amount of prechlorine, the addition of a small amount of preammonia, and the combination of prechlorine and preammonia. Results show bromate formation would likely exceed the proposed MCL of 10 ppb when ozone was added to produce a 2-log Crypto inactivation and no mitigation technique was used. Bromate formation could be reduced without a mitigation technique by lowering the inactivation to approximately 0.75-log to meet the project goal of 5 ppb and to approximately 1.0-log to meet the MCL. The addition of a small amount of prechlorine did not significantly reduce bromate formation when compared to no mitigation technique. However, preammonia addition and the combination of prechlorine and preammonia addition did significantly reduce bromate formation to 5 ppb at 2-log Crypto inactivation. Although a dose of 0.5 mg/L of ammonia alone was required to meet the bromate goal, adding 0.5 mg/L of prechlorine followed by ammonia allowed the ammonia dose to be reduced to 0.1 mg/L and still meet the 5 ppb goal. Includes 2 references, tables, figures.