长期2强化地表水处理规则（LT2ESWTR）规定，对于饮用水处理厂 （DWTP）获得紫外线（UV）灭活耐氯病原体（如 隐孢子虫和贾第鞭毛虫，必须进行验证测试，以证明 紫外线反应器设备提供所需剂量。本文总结了广泛的研究成果 在德国DVGW测试中心与 目的评价两种密闭式紫外线反应器的消毒效果 饮用水。横流直列式反应器和轴流底部穿过顶部反应器 使用4-kWatt中压灯运行时，使用紫外线强度设定点进行测试 方法和枯草芽孢杆菌孢子作为病原体指示剂。本文回顾了 生物测定期间测量的消毒性能的关键设计参数 验证测试。评估的关键设计参数包括传感器到套管的距离， 接近水力学、反应器入口和出口配置以及掺杂与非掺杂 袖子。确定了传感器到套管距离的优化对屈服至关重要 最大反应堆性能。增加传感器到套管的初始距离 有益的结果。在入口管道直径小于 横流反应器的直径，由此产生的方法水力产生了一个高入口 速度，被描述为核心喷射，以及随后的性能下降。这个 消力板的实施在一定程度上恢复了性能，尤其是在低成本的情况下 流动条件。使用掺杂聚合物对反应器性能没有显著影响 与未掺杂的袖子相比。仔细考虑和优化设计参数 本文概述的是任何反应堆验证计划的重要组成部分，确保紫外线 反应器可以在广泛的水质和流量范围内提供适当的紫外线剂量 水处理设施的条件。包括4个参考文献、表格和图表。

The Long Term 2 Enhanced Surface Water Treatment Rule (LT2ESWTR) dictates that for a drinking water treatment plant (DWTP) to receive credit for ultraviolet (UV) inactivation of chlorine resistant pathogens such as Cryptosporidium and Giardia, validation testing must be performed to demonstrate that the UV reactor equipment delivers the required dose. This paper summarizes an extensive bioassay validation program undertaken at the DVGW testing center in Germany with the objective to evaluate the performance of two closed-vessel UV reactors for the disinfection of drinking water. A cross-flow in-line reactor and an axial-flow bottom-through-top reactor operating with 4-kWatt medium pressure lamps were tested using the UV intensity set-point method and Bacillus subtilis spores as a pathogen indicator. The paper reviews the impact of key design parameters on the disinfection performance as measured during bioassay validation testing. Key design parameters evaluated include sensor to sleeve distance, approach hydraulics, reactor inlet and outlet configuration and doped versus non-doped sleeves. It was determined that optimization of sensor to sleeve distance is vital to yielding maximum reactor performance. Increasing the initial sensor to sleeve distance produced beneficial results. Under conditions where the inlet pipe diameter was smaller than the diameter of the cross-flow reactor, the resulting approach hydraulics yielded a high inlet velocity, described as a core jet, and subsequent degradation of performance. The implementation of a stilling plate restored performance to some extent particularly with low flow conditions. No significant impact on reactor performance was observed by using doped versus non-doped sleeves. Careful consideration and optimization of the design parameters outlined herein is a vital component of any reactor validation program, ensuring that UV reactors can deliver the proper UV dose over a wide range of water quality and flow conditions experienced at water treatment facilities. Includes 4 references, tables, figures.