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Bioregeneration of Perchlorate-selective Ion-Exchange Resins Containing Perchlorate and Nitrate 含高氯酸盐和硝酸盐的高氯酸盐选择性离子交换树脂的生物再生
发布日期: 2008-11-01
本powerpoint演示文稿首先简要概述了水源中的高氯酸盐检测和用于去除高氯酸盐的离子交换树脂。 这项研究的目的是 利用微生物还原 再生被污染的树脂 含有高氯酸盐和硝酸盐,是一种环保的 树脂的可持续替代品 “装载并燃烧”。提供了工艺描述和实验方法,以及高氯酸盐选择性的生物再生 树脂,硝酸盐选择性生物再生 树脂,然后清除污垢 生物再生。陈述结论表明: 负载硝酸盐选择性离子交换树脂 可使用硝酸盐和/或高氯酸盐 用微生物富集法再生 文化 类似于硝酸盐选择性树脂,用过 也可以使用高氯酸盐选择性树脂 再生,从而防止“负载和 “燃烧”树脂, 树脂污垢可以通过几种方法去除 除污剂。树脂生物再生有几个优点,包括: 将高氯酸盐和硝酸盐转化为无害物质 氯化物和氮气; 重复使用高氯酸盐/硝酸盐 离子交换树脂可能受到污染; 有可能降低离子交换的成本 供水设施; 技术是环境可持续的,而且 减少二氧化碳排放;和 碳信用可能会被授予 不焚烧树脂的供水设施。包括表格,数字。
This powerpoint presentation begins by providing a brief overview of perchlorate detection in water sources and ion exchange resins used for perchlorate removal. The objective of this research was to use microbial reduction to regenerate resins contaminated with perchlorate and nitrate, an environmentally sustainable alternative to resin "load and burn". Process description and experimental approach are provided, along with bioregeneration of perchlorate-selective resin, Bioregeneration of Nitrate-selective Resin, and Fouling Removal after Bioregeneration. Presentation conclusions indicate that: nitrate-selective ion exchange resin loaded with nitrate and/or perchlorate can be regenerated using a microbial enrichment culture; similar to nitrate-selective resin, spent perchlorate-selective resin can also be regenerated, thereby preventing "load and burn" of resins; and, resin fouling can be removed by several fouling removal agents. Resin bioregeneration has several advantages, including: converts perchlorate and nitrate to innocuous chloride and nitrogen gas; makes reuse of perchlorate/nitrate contaminated ion exchange resin possible; has the potential to reduce the cost of ion exchange for water utilities; technology is environmentally sustainable and minimizes carbon dioxide emissions; and, carbon credit can potentially be awarded to water utilities that do not incineratee resin. Includes table, figures.
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发布单位或类别: 美国-美国给水工程协会
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