A suitable model of combined effects of temperature and initial condition on chlorine bulk decay in water distribution systems
A suitable model of combined effects of temperature and initial condition on chlorine bulk decay in water distribution systems
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DOI：
10.1016/j.watres.2012.03.017
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发表时间：
2012-06-15
期刊：
影响因子：
12.8
通讯作者：
Sathasivan, Arumugam
中科院分区：
文献类型：
--
作者：
Fisher, Ian;Kastl, George;Sathasivan, Arumugam
保持氯残留是许多配水系统的主要消毒目标。一个合适的氯在输送散装水中衰变的通用模型是有效模拟分配系统中氯浓度的重要组成部分。双反应物模型满足基本适用性标准，包括从氯浓度0-4 mg/L开始的数百小时氯残留量的准确预测。根据阿伦尼乌斯理论，用一个随温度增加衰变系数的方程扩充了这个模型。增强模型根据衰变测试数据集进行校准，以获得每种水的单一不变参数集。在通常的初始氯浓度（1-4毫克/升）和温度（3.5-28摄氏度）的操作范围内，随着时间的推移，模型估计的氯残留量与衰变试验数据非常吻合。当增强模型拟合到部分数据集时，它也能很好地预测待验证的数据，这表明该模型可以准确地预测初始氯浓度和温度对分配系统中氯体积衰变的综合影响，使用一组给定源水的不变参数。(c) 2012 Elsevier Ltd.版权所有。
Maintaining a chlorine residual is a major disinfection goal in many water distribution systems. A suitable general model of chlorine decay in the transported bulk water is an essential component for efficiently modelling chlorine concentration in distribution systems. The two-reactant model meets basic suitability criteria, including accurate prediction of chlorine residual over hundreds of hours, commencing with chlorine concentration 0-4 mg/L. This model was augmented with an equation that increases the decay coefficients with temperature according to Arrhenius theory. The augmented model was calibrated against decay-test data sets to obtain a single invariant set of parameters for each water. Model estimates of chlorine residuals over time closely matched decay-test data, over the usual operating ranges of initial chlorine concentration (1-4 mg/L) and temperature (3.5-28 degrees C). When the augmented model was fitted to partial data sets, it also predicted the data reserved for validation very well, suggesting that this model can accurately predict the combined effect of initial chlorine concentration and temperature on chlorine bulk decay in distribution systems, using a single set of invariant parameters for a given source water. (c) 2012 Elsevier Ltd. All rights reserved.