Taste and Odor Evaluation of Polyurethane and Epoxy Lining Materials

机译：聚氨酯和环氧内衬材料的味道和气味评估

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The Southern Nevada Water Authority (SNWA) is considering the use ofrnpolyurethane and epoxy lining systems in lieu of traditional cement mortar lining for overrn200 miles of large diameter steel pipe to transport groundwater from east-central Nevada.rnThe materials being considered meet the criteria for NSF 61 certification, making themrnacceptable lining materials for potable water treatment and transmission. However,rnexperience of these alternative lining systems for the transport of potable or raw water isrnlimited in the water industry. For this reason, SNWA chose to perform a water qualityrnevaluation to investigate the potential for leaching. Leaching could result in the releasernof microcontaminants, taste and odor issues, or formation of disinfection byproducts.rnIn order to evaluate the suitability of these materials for use in the SNWArntransmission system, seven buckets were lined with either an epoxy or polyurethanernmaterial. Each bucket was given a letter designation to hide the supplier’s identity as thisrnwas not a “pre-qualification” effort for design of the pipeline. Water quality analysisrnincluded profile attribute analysis, chlorine demand, and VOC production. Resultsrnshowed that the epoxy materials appeared to exert more chlorine demand thanrnpolyurethane materials. Two lining products performed well based upon taste (totalrnintensity of flavor (TIF), odor (total intensity of aroma (TIA), VOC production, andrnchlorine demand. However, the results indicate that a flushing program will be requiredrnfor either lining system if chlorinated groundwater is to be stored in the pipeline for arnlong period of time.

机译：内华达州南部水务局（SNWA）正在考虑使用聚氨酯和环氧衬里系统代替200英里以上的大直径钢管的传统水泥砂浆衬里，以从内华达中东部输送地下水.rn所考虑的材料符合NSF的标准61认证，使它们成为用于饮用水处理和传输的可接受的衬里材料。然而，在水工业中，用于饮用水或原水的这些替代衬里系统的经验受到限制。出于这个原因，SNWA选择进行水质评估以调查潜在的浸出。浸出可能导致释放微污染物，味道和气味问题或形成消毒副产物。为了评估这些材料适用于SNWA传输系统的适用性，七个桶内衬有环氧树脂或聚氨酯材料。每个存储桶都被赋予了字母标记以隐藏供应商的身份，因为这并不是管道设计的“资格预审”工作。水质分析包括剖面属性分析，氯需求量和VOC产量。结果表明，环氧材料似乎比聚氨酯材料具有更多的氯需求。两种内衬产品根据味道（风味总强度（TIF），气味（总香气强度（TIA），VOC产生和氯需求）而表现良好。但是，结果表明，如果使用氯化地下水，则任一衬里系统都需要冲洗程序将在管道中存储一段时间。

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来源
《2011 water quality technology conference amp; exposition: An Oasis of Ideas for a Changing Environment.》|2011年|p.1-14|共14页
会议地点 Phoenix AZ(US);Phoenix AZ(US)
作者
Eric Wert; Gina Neilson; Dave Rexing;
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Southern Nevada Water Authority;

Southern Nevada Water Authority;

Southern Nevada Water Authority;

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原文格式 PDF
正文语种 eng
中图分类水质;水质;
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Taste and Odor Evaluation of Polyurethane and Epoxy Lining Materials

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