Ganzi G C, Parise P L
Ionpure Technologies Corporation, Bedford, Massachusetts.
J Parenter Sci Technol. 1990 Jul-Aug;44(4):231-41.
Continuous deionization (CDI) devices to purify water have recently become available. CDI and reverse osmosis (RO) equipment can form the key elements of water treatment trains that produce ultrapure water, without the need for the chemical regenerants associated with batch ion-exchange processes. CDI systems used as downstream polishers of RO product water have been found to be effective for the removal of trace ionic contaminants. Recently, CDI technology was extended, and devices are now capable of removing dissolved carbon dioxide without the requirement of pH adjustment. Examples from a number of installations are provided. CDI systems have been found to reduce the levels of total oxidizable carbon as well. Field experiences are provided and discussed. RO/CDI systems can be maintained to provide product water with low levels of bacteria and pyrogens. The results of a nine-month study of a system designed to produce pharmaceutical grade water are provided.
用于净化水的连续去离子化（CDI）设备最近已面市。CDI和反渗透（RO）设备可构成生产超纯水的水处理流程的关键要素，无需与间歇离子交换工艺相关的化学再生剂。已发现用作RO产水下游精处理装置的CDI系统对于去除痕量离子污染物有效。最近，CDI技术得到了扩展，现在的设备能够在无需调节pH值的情况下去除溶解的二氧化碳。提供了多个装置的实例。还发现CDI系统能降低总可氧化碳的水平。提供并讨论了现场经验。RO/CDI系统可进行维护，以提供细菌和热原含量低的产水。提供了一个旨在生产医药级水的系统为期九个月的研究结果。
