本文总结了伊利市水质总体规划的结果 管理局（ECWA）栗子街和索默海姆水处理厂。讨论的具体问题 其中包括消毒、液流处理和残留物处理替代方案。明确地 本文讨论了消毒的替代方案，包括紫外线（UV）光，这是每一个考虑 处理厂以及为每个厂选择的最终替代方案，以符合 宾夕法尼亚州环境保护部（PADEP）消毒设计要求。 这两个工厂目前都生产高质量的水，并满足所有主要的饮用水法规（即。 D/DBP、ICR、IESWTR等）；然而，由于净井体积有限，几乎没有或几乎没有阻碍 工厂无法满足PADEP消毒设计要求。 目前，PADEP需要新的或 改造后的水处理厂应设计为通过 过滤后贾第虫至少1对数失活的处理厂。两个处理厂 根据这项规定，他们目前是“祖父母”，这意味着他们不需要满足 上述消毒要求。然而，由于这两个处理厂的使用年限，ECWA是 计划升级液体和固体流工艺。经过这些修改，工厂 将不再按照规定继承；因此，他们将需要考虑消毒。 使其符合PADEP标准和预期目标的替代方案 LT2ESWTR中的隐孢子虫灭活要求，PADEP也可能采用。 根据工艺和现场条件，确定紫外光和氯气是最好的 满足LTESWTR和PADEP消毒要求的选项。 包括表格、数字。

This paper summarizes the results of a water quality master plan that was completed for Erie City Water Authority's (ECWA) Chestnut Street and Sommerheim water treatment plants. Specific issues that were addressed included disinfection, liquid stream processes, and residual disposal alternatives. Specifically, this paper discusses the disinfection alternatives, including ultraviolet (UV) light, that were considered for each treatment plant and the final alternatives that were selected for each plant to comply with the Pennsylvania Department of Environmental Protection (PADEP) disinfection design requirements. Both plants currently produce high quality water and meet all of the major drinking water regulations (i.e. D/DBP's, ICR, IESWTR, etc.); however, due to the limited clear well volumes with little or no baffling, both plants cannot meet the PADEP disinfection design requirements. Currently PADEP requires that new or modified water treatment plants be designed to achieve 3-log inactivation of Giardia through the treatment plant with at least 1-log inactivation of Giardia occurring after filtration. Both treatment plants are currently "grandfathered" under this regulation, which means they are not required to meet the disinfection requirements outlined above. However, due to the age of both treatment plants, ECWA is planning on upgrading their liquid as well as solids stream processes. With these modifications, the plant will no longer be grandfathered under the regulations; therefore, they will need to consider disinfection alternatives which will allow them to comply with the PADEP standards as well as the anticipated inactivation requirements for Cryptosporidium in the LT2ESWTR which may also be adopted by PADEP. Based on the process and site conditions, it was determined that UV light followed by chlorine is the best option to meet the LTESWTR and the PADEP disinfection requirements. Includes tables, figures.