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Results and Assessment from Full-Scale Testing of Integrity Monitoring Methods for MF and UF Processes MF和UF工艺完整性监测方法的全面测试结果和评估
发布日期: 2003-03-05
当前和拟议的法规侧重于在微生物和微生物方面越来越严格的水质目标 浊度去除,同时也包括平衡微生物风险和最小化消毒副产品等挑战 (DBPs)。微滤(MF)和超滤(UF)都是低压膜处理过程 通过物理过滤病原体和其他颗粒物,不需要使用化学氧化剂对饲料进行消毒 水它们能够有效去除微生物和颗粒污染物。因此,它们已成为 非常有吸引力的技术,可以应对当前和拟议法规的挑战。 使用MF/UF工艺有效去除污染物的前提是膜的完整性保持不变。 需要进行完整性监测,以确保成品水的高质量和一致性。因此,目前 这些过程的实际应用和适当监管验收中的重要问题涉及 监控膜和工艺的完整性。然而,膜完整性对工艺性能的影响 对于不同类型的设备,可用于完整性监控的各种方法和工具尚未进行详细分析 膜系统,尤其是来自全尺寸测试和验证的结果。完整性的稀释效应 在中试规模的装置和全尺寸的膜架中,突破是不同的。因此,需要进行全尺寸测试,以确保正确和可靠 对这些方法的现实评估。 本文介绍的工作是作为AwwaRF正在进行的一个关于设备完整性测试的研究项目的一部分进行的 低压膜工艺。这项研究包括在选定地点对各种完整性监测方法进行全面测试 水处理厂。该测试正在代表不同膜的六家参与膜厂进行 系统。在撰写本手稿时,序列中第四个工厂的测试已经完成。这篇论文 介绍正在进行的研究项目的中期结果。包括4个参考文献、表格、图表。
Current and proposed regulations focus on increasingly stricter water quality goals with respect to microbial and turbidity removal, while also including challenges such as balancing microbial risk and minimization of disinfection byproducts (DBPs). Microfiltration (MF) and ultrafiltration (UF) are low-pressure membrane treatment processes that function by physically straining pathogens and other particulate matter, and do not require use of chemical oxidants to disinfect feed water. They are capable of providing effective removal of microbial and particulate contaminants. Thus, they have become extremely attractive technologies for meeting the challenges of current and proposed regulations. Effective contaminant removal using MF/UF processes assumes that the integrity of the membranes remains intact. Integrity monitoring is required to ensure high and consistent finished water quality. Thus, currently one of the most important issues in the practical application and proper regulatory acceptance of these processes involves the methods of monitoring the integrity of the membrane and the process. However, effects of membrane integrity on process performance and the various methods and tools available for integrity monitoring have not yet been analyzed in detail for different types of membrane systems, especially from results derived from full-scale testing and validation. Dilution effects of an integrity breach are different in pilot scale units versus full-scale membrane racks. Thus, full scale testing is required for proper and realistic evaluation of these methods. The work presented here is being performed as part of an ongoing AwwaRF research project on integrity testing of low-pressure membrane processes. The study includes testing of various integrity monitoring methods at full-scale at selected water treatment plants. The testing is being performed at six participant membrane plants representing different membrane systems. At the time of writing this manuscript, the testing at the fourth plant in the sequence has been completed. This paper presents interim results from the ongoing research project. Includes 4 references, 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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