Drinking water treatment with UV/H2O2: interactions with upstream and downstream processes

多伦多市正在考虑在其几个饮用水处理厂安装UV/H2 O2高级氧化，以控制季节性味道和气味物质。AECOM是其中一个系统的设计顾问。对UV/H2 O2饮用水处理技术现状的初步审查揭示了该过程基础科学中的几个重要知识空白。迄今为止，大部分UV/H2 O2研究都集中在孤立的UV/H2 O2过程，忽略了可能涉及UV/H2 O2过程和上游或下游应用的其他化学品之间的相互作用的潜在复杂因素。实际上，这些相互作用确实存在，并且有能力自信地设计和操作UV/H2 O2处理过程需要我们了解与这些潜在相互作用相关的所有含义。这里提出的研究是针对这些知识差距。了解到的信息将立即有利于多伦多新设施的设计和运营，以及AECOM作为领先处理技术设计的世界领导者的声誉。 需要探讨的具体现象包括： 1.来自上游工艺的余氯对UV/H2 O2性能的影响 2.在存在来自上游AOP的残余H2 O2或H2 O2淬灭剂的情况下，影响下游氯胺形成的因素; 3.与不同的残余H2 O2猝灭方法相关的反应动力学和操作问题，包括不同pH值和温度下的氯、亚硫酸盐和硫代硫酸盐;以及 4.由于H2 O2+氯反应而形成的单线态氧的量，及其对消毒副产物形成潜力的影响，以及有机物特性。 这项工作将资助一名研究生和（部分）一名博士后研究员，为期2年。

The City of Toronto is considering installation of UV/H2O2 advanced oxidation to control seasonal taste and odour-causing substances at several of its drinking water treatment plants. AECOM is a consultant on the design of one of those systems. A preliminary review of the state of the art of UV/H2O2 for drinking water treatment has revealed several important knowledge gaps in the fundamental science of this process. To date, much of the UV/H2O2 research has focused on the UV/H2O2 process in isolation, ignoring the potential complicating factors that might be involved with interactions between the UV/H2O2 process and other chemicals applied upstream or downstream. In reality, these interactions do exist, and the ability to confidently design and operate a UV/H2O2 treatment process requires that we understand all of the implications related to these potential interactions. The research proposed here is aimed at these knowledge gaps. The information learned will be of immediate benefit for the design and operation of Toronto's new facilities, as well as to AECOM's reputation as a world leader in the design of leading-edge treatment technologies. The specific phenomena to be explored include: 1.The effects of residual chlorine from upstream processes on UV/H2O2 performance; 2.Factors that affect downstream chloramine formation in the presence of residual H2O2 from the upstream AOP, or by H2O2 quenching agents; 3.The reaction kinetics and operational issues associated with different residual H2O2 quenching methods, including chlorine, sulfite, and thiosulphate at different pH and temperatures; and 4.The amount of singlet oxygen formation due to H2O2 + chlorine reaction, and its impact on disinfection by-product formation potential, and organic matter characteristics. The work will fund one graduate student and (partially) one postdoctoral fellow for a period of 2 years.