ABSTRACT

The use of adequate decay models for simulating chlorine residuals can effectively aid in chlorine management in water supply systems. In this paper, wall decay in a full-scale water supply system is assessed and modelled using the traditional first-order (FO) model and the recent EXPBIO model. The EXPBIO model was successfully implemented in EPANET-MSX for the first time and predicted chlorine residuals with high accuracy. However, in the tested conditions (chlorine residuals ≥0.55 mg/L and small wall decay rates), the FO and the EXPBIO models described chlorine wall decay with similar accuracy. The results suggest that in systems of large diameter pipes and of high disinfectant concentrations, the simpler FO model can be used for the modelling of chlorine residuals without significant loss of accuracy. Further research is needed to identify in which conditions (chlorine levels, wall decay rates) the EXPBIO model performance may exceed that of the FO model.

摘要

使用适当的衰减模型来模拟氯残留物可以有效地帮助供水系统中的氯管理。在本文中，使用传统的一阶（FO）模型和最新的EXPBIO模型对全尺寸供水系统中的墙体衰减进行评估和建模。EXPBIO模型首次在EPANET-MSX中成功实现，并以高精度预测了氯残留量。但是，在测试条件下（氯残留物≥0.55mg / L且壁衰减率小），FO和EXPBIO模型描述的氯壁衰减具有相似的准确度。结果表明，在大直径管道和高消毒剂浓度的系统中，较简单的FO模型可用于对氯残留物进行建模，而不会显着降低精度。