最近发现隐孢子虫失活发生在 经济上可行的紫外线（UV）剂量产生了 对饮用水的紫外线消毒感兴趣。许多公用事业公司正在考虑将紫外线消毒作为一种手段，以满足其现有设施未来的监管要求。大多数评估紫外线消毒的公用事业公司将改造现有的处理厂。在本文中，估算了在过滤器之后和clearwell之前对现有设施进行紫外线消毒改造的资本、运营和维护以及年化总成本。 对40 mJ的紫外线剂量进行了成本估算。根据目前的研究，这将确保隐孢子虫至少2对数失活，并适用于一系列流量和过滤水质。提出的成本估算表明，紫外线消毒是一种相对廉价的方法，可以实现高水平的消毒 隐孢子虫灭活。正如预期的那样，随着系统规模的减小，年化成本增加，尽管成本低于提供类似隐孢子虫去除/灭活水平的其他技术。 包括35个参考文献、表格和图表。

Recent findings that Cryptosporidium inactivation occurs at technically and economically feasible ultraviolet (UV) doses have generated a wellspring of interest in UV disinfection for drinking water. Many utilities are considering UV disinfection as a means to meet future regulatory requirements at their existing facilities. Most utilities evaluating UV disinfection will be retrofitting existing treatment plants. In this article, capital, operations and maintenance, and total annualized costs were estimated for retrofitting existing facilities with UV disinfection after the filters and before the clearwell. Cost estimates were developed for a UV dose of 40 mJ.cm2, which would ensure at least 2-log inactivation of Cryptosporidium, based on current research, and for a range of flows and filtered water qualities. The cost estimates presented indicate that UV disinfection is a relatively inexpensive method to achieve a high level of Cryptosporidium inactivation. As expected, annualized costs increased as system size decreased, although the costs were lower than those of other technologies providing similar levels of Cryptosporidium removal/inactivation. Includes 35 references, tables, figures.