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Journal AWWA - Enhanced Softening: Effects of Lime Dose and Chemical Additions AWWA期刊-增强软化:石灰剂量和化学添加剂的影响
发布日期: 2003-11-01
去除天然有机物(NOM)是一项重要的技术 饮用水行业最关心的问题, 但实践很少受到关注 增强软化、其好处和相关挑战。 此外,之前的报告中没有包括 软化对消毒液形成的影响 副产品。本文提供了使用软化的实用程序 有一个蓝图来研究他们自己是如何运作的 可能会被修改以实现更好的NOM清除 减少消毒副产物的形成 使用软化的公用事业公司将对 研究结果描述了NOM的去除 软化,以及二氧化硅对软化的影响 以及NOM的去除和溴化物对环境的影响 三卤甲烷的物种形成。作者也 讨论增强软化如何能够 实现美国环境保护署的 在未完成安装的情况下移除NOM的要求 氢氧化镁沉淀[Mg(OH)2]。 虽然Mg(OH)2是一种更有效的吸附剂 NOM,碳酸钙,在 pH值较低,因此需要较低的石灰用量 在软化过程中,也能产生大量的NOM 移动包括20个参考文献、表格和图表。
The removal of natural organic matter (NOM) is a primary concern for the drinking water industry, but little attention has been paid to the practice of enhanced softening, its benefits, and associated challenges. Additionally, no previous reports had included the effects of softening on the formation of disinfection byproducts. This article provides utilities that use softening with a blueprint for studying how their own operations might be altered to achieve better NOM removals and reduced disinfection byproduct formation Utilities that use softening will be interested in the study results describing removal of NOM in softening, as well as the effects of silica on softening and NOM removal and the effects of bromide on the speciation of trihalomethanes. The authors also discuss how enhanced softening may be able to achieve the US Environmental Protection Agency's requirements for removal of NOM without complete precipitation of magnesium hydroxide [Mg(OH)2]. Although Mg(OH)2 is a more efficient adsorbent of NOM, calcium carbonate, which precipitates at lower pH and therefore requires lower lime dosage in softening, is also capable of substantial NOM removal. Includes 20 references, tables, 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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