Wastewater Treatment Laboratory, Centre of Water Research and Technologies, Borj Cedria BP. 273, 8020 Soliman, Tunisia.
Water Sci Technol. 2012;65(4):589-95. doi: 10.2166/wst.2012.896.
Korba wastewater treatment plant is a conventional activated sludge followed by three maturation ponds (MP1, MP2, MP3) in series acting as a tertiary treatment. The first study of wastewater treatment plants showed that the effluent concentration of Escherichia coli and enterococci at the outlet of the (MP3) varies between 10(3) and 10(4)CFU/100 ml. After the hydrodynamic study conducted by Rhodamine WT which showed short-circuiting in the MP1, two baffles were introduced in the first maturation pond (MP1) to improve the hydrodynamic and the sanitary performances. The second hydraulic study showed that the dispersion number 'd' was reduced from 1.45 to 0.43 by this engineering intervention and the Peclet number was raised from 0.69 to 2.32. The hydraulic retention time was increased by 14 h. Because of well-designed baffles, the removal efficiency of E. coli and enterococci was raised between 0.2 and 0.7 log units for the first maturation pond.
科尔巴污水处理厂采用传统的活性污泥法，随后是三个串联的成熟池（MP1、MP2、MP3），作为三级处理。对污水处理厂的首次研究表明，（MP3）出口处大肠杆菌和肠球菌的出水浓度在 10（3）到 10（4）CFU/100ml 之间变化。在 Rhodamine WT 进行水动力研究后，该研究表明 MP1 中存在短路，在第一个成熟池（MP1）中引入了两个挡板，以改善水动力和卫生性能。第二次水力研究表明，通过这种工程干预，分散数 'd' 从 1.45 降低到 0.43，而佩克莱数从 0.69 提高到 2.32。水力停留时间增加了 14 小时。由于挡板设计良好，第一个成熟池的大肠杆菌和肠球菌去除效率提高了 0.2 到 0.7 个对数单位。
