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Disinfection Alternatives for Water Distribution Systems Following Biological Contamination 生物污染后供水系统的消毒替代方案
发布日期: 2008-11-01
本powerpoint演示文稿首先简要概述了美国的病原体消毒研究 水网络生物膜,以及病原体替代物,是研究的独特方面 病原体粘附 生物膜和二氧化氯作为 替代消毒剂。本研究的目的是: 在氯和氯之间建立关联 球形双歧杆菌消毒过程中的二氧化氯; 测定不同浓度下的CT值 需要达到1、2和3原木减少量; 确定每种消毒剂的CT滞后值 需要克服传质限制 由于其在规定的消毒时间内的特性 pH值和孢子表面电荷 延迟奇克-沃森模型;和 确定暴露时间和时间的影响 集中在灭活率上。最初的实验包括以下内容: 模型分配系统为环形生物膜 带有铁试样的反应器(棒); 替代物被脉冲注射 (lebsiella pneumoniae(Burkholderia malley)和 球形芽孢杆菌(炭疽芽孢杆菌);还有 目的是确定这些设备的消毒效果 在生锈的铁上生长的生物膜中的微生物 使用氯。介绍的主题包括:初步的球形双歧杆菌消毒 氯的研究;批量消毒实验 后果延迟奇克-沃森模型;沃森图分析;沃森绘制了大量 实验;生物膜发育;生物膜消毒 情节;二氧化氯结果;水泥和水泥内衬管;结果相对于 铸铁管;以及具体的结论。包括数字。
This powerpoint presentation begins by providing a brief overview of pathogen disinfection research in water network biofilms, along with pathogen surrogates, unique research aspects of pathogen adhesion to biofilm, and chlorine dioxide as an alternative disinfectant. The objectives of this research were to: develop a correlation between chlorine and chlorine dioxide during disinfection of B. globigii; determine the CT values at different concentrations needed to reach 1, 2 and 3 log reductions; identify the CTlag value that each disinfectant requires to overcome mass transfer limitations due to its properties at the specified disinfection pH and spore surface charge by using the delayed Chick-Watson model; and, determine the effect of exposure time and concentration on the inactivation rate. Initial experiments consisted of the following: model distribution system was a Biofilm Annular Reactor (BAR) with iron coupons; surrogates were pulse injected (lebsiella pneumoniae (Burkholderia mallei) and Bacillus globigii (Bacillus anthracis)); and, the objective was to determine the disinfection of these organisms in biofilms growing on rusted iron using chlorine. Topics presented include: preliminary B. globigii disinfection research with chlorine; bulk disinfection experiment results; delayed Chick Watson Model; Watson Plot Analysis; Watson Plots for bulk experiments; biofilm development; biofilm disinfection Watson Plots; chlorine dioxide results; cement and cement-lined pipe; results relative to cast iron pipe; and, concrete pipe conclusions. Includes 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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