Laboratoire Traitement des Eaux Usées, Centre de Recherches et Technologies des Eaux (CERTE) BP. 273, 8020 Soliman, Tunisie E-mail:
Unité Assainissement et Environnement, Université de Liège, Campus d'Arlon, Av. de Longwy 185, 6700 Arlon, Belgique.
Water Sci Technol. 2014;69(4):755-9. doi: 10.2166/wst.2013.774.
During the last 15 years several authors studied the disinfection in waste stabilisation pond (WSP) and several empirical models were developed. There are huge differences between the models describing this process and there is really a need to improve the design of ponds for better disinfection. This paper addresses the Escherichia coli and enterococci disinfection in a laboratory pilot scale maturation pond (1.5 l) with light intensity (0, 12 and 25 W/m(2)) under controlled pH, temperature and dissolved oxygen (DO) conditions. The aim of this study is to improve modelling for a better design of disinfection in maturation ponds (MP) and to identify the key parameters influencing the process. It was found that kinetic coefficients K values for E. coli and enterococci are closely dependent on physicochemical parameters. K values increase with increasing pH, I, T and DO. E. coli disinfection depends closely on the pH and the DO and increases strongly when the pH is above 8.5. The enterococci disinfection depends essentially on DO. Two equations are suggested to calculate the kinetic coefficient K related to the environmental average state variables.
在过去的 15 年中，有几位作者研究了污水稳定塘（WSP）的消毒，并且开发了几个经验模型。描述这个过程的模型之间存在很大差异，因此确实需要改进池塘的设计以达到更好的消毒效果。本文研究了在实验室中采用小尺度（1.5 升）成熟塘，通过控制 pH 值、温度和溶解氧（DO）条件下，不同光照强度（0、12 和 25 W/m²）对大肠杆菌和肠球菌的消毒效果。本研究的目的是改进模型以更好地设计成熟塘的消毒，并确定影响该过程的关键参数。结果表明，大肠杆菌和肠球菌的动力学系数 K 值与物理化学参数密切相关。K 值随 pH 值、光照强度、温度和 DO 的增加而增加。大肠杆菌的消毒与 pH 值和 DO 密切相关，当 pH 值高于 8.5 时，消毒效果显著增强。肠球菌的消毒主要取决于 DO。提出了两个方程来计算与环境平均状态变量相关的动力学系数 K。
