建立了长期2强化地表水处理规则（LT2ESWTR） 臭氧灭活隐孢子虫的指南。为了满足 根据这些要求，饮用水公用事业公司可能必须采用溴酸盐缓解措施 符合第1阶段消毒剂/消毒副产品规则的技术， 确定溴酸盐的最大污染水平（MCL）为10µg/L。在里面 2000年，内华达州南部水务局（SNWA）和Black&Veatch启动了试点工厂 不同预处理策略对溴酸盐控制效果的研究 组成 结果表明，先使用预氯，再使用预氨 与无缓解技术相比，减少了65-95%的溴酸盐生成。这个 该工艺通过将溴化物预氧化为次溴酸来控制溴酸盐的形成， 然后与氨反应生成溴胺。溴胺能隔离空气 溴化物通过臭氧接触器减少溴酸盐的形成。在 接下来的几年里，设计和建造了氨加料设施，以实现 这是一个全面的过程。2006年，SNWA开始使用预处理技术 在300 MGD的River Mountains水处理设施。 90天的评估 证明了氯氨（Cl2-NH3）工艺可以将溴酸盐浓度维持在MCL以下。此外，Cl2-NH3工艺允许三重 CT增加，同时仍符合MCL。这种预处理技术提供了 公用设施是控制溴酸盐形成的另一种预处理替代方案。包括6个参考文献、表格、图表。

The Long Term 2 Enhanced Surface Water Treatment Rule (LT2ESWTR) established guidelines for Cryptosporidium inactivation credit with ozonation. In order to meet these requirements, drinking water utilities may have to employ a bromate mitigation technique to comply with the Stage 1 Disinfectant/Disinfection Byproducts Rule, which established a maximum contaminant level (MCL) of 10 µg/L for bromate. In 2000, the Southern Nevada Water Authority (SNWA) and Black & Veatch initiated pilot plant studies investigating the effect of various pretreatment strategies to control bromate formation. Results showed that the use of prechlorine followed by preammonia reduced bromate formation by 65-95% compared to no mitigation technique. The process controls bromate formation by preoxidizing bromide to hypobromous acid, which then reacts with ammonia to form bromamine. Bromamines sequester the bromide through the ozone contactor reducing the formation of bromate. In the following years, ammonia feed facilities were designed and constructed to implement this process at full-scale. In 2006, the SNWA began using the pretreatment technique at the 300 MGD River Mountains Water Treatment Facility. A 90-day evaluation demonstrated that the chlorine-ammonia (Cl2-NH3) process could maintain bromate concentrations below the MCL. In addition, the Cl2-NH3 process allowed a threefold increase in CT while still meeting the MCL. This pretreatment technique offers utilities another pretreatment alternative to control the formation of bromate. Includes 6 references, table, figures.