Civil Engineering Research Group, School of Computing, Science and Engineering, The University of Salford, Newton Building, Salford, M5 4WT, England, UK.
Environ Sci Pollut Res Int. 2015 Sep;22(17):12779-803. doi: 10.1007/s11356-014-3732-8. Epub 2014 Oct 24.
Clogging often leads to a decrease of the treatment performance of wetlands. The aims of this study were to compare the impact of different design and operational variables on the treatment efficiency and clogging processes and to model suspended solid (SS) accumulation within the saturated wetland zone using the Wang-Scholz model. Different vertical-flow constructed wetlands were operated from June 2011 until April 2014. Four treatment periods were assessed: set-up, first year after set-up period, second year after set-up period and diesel spill (for selected filters only). The filter with the highest chemical oxygen demand (COD) loading but no diesel contamination performed the best in terms of COD and biochemical oxygen demand (BOD) removal for the fourth and final treatment period. Filters contaminated by diesel performed worse in terms of COD and BOD but considerably better regarding nitrate-nitrogen removal. Serious clogging phenomena impacting negatively on the treatment performance and the hydraulic conductivity were not observed. Modelling results were generally poor for the set-up period, adequate for the first 2 years after the set-up period and variable after the diesel spill. The Wang-Scholz model performed well for less complex operations.
堵塞通常会导致湿地处理性能下降。本研究旨在比较不同设计和操作变量对处理效率和堵塞过程的影响，并使用 Wang-Scholz 模型对饱和湿地带内的悬浮固体 (SS) 积累进行建模。不同的垂直流人工湿地从 2011 年 6 月运行到 2014 年 4 月。评估了四个处理期：安装期、安装后第一年、安装后第二年和柴油溢出（仅对选定的过滤器）。在第四个也是最后一个处理期，COD 负荷最高但没有柴油污染的过滤器在 COD 和生化需氧量 (BOD) 去除方面表现最好。受柴油污染的过滤器在 COD 和 BOD 方面表现较差，但在硝酸盐氮去除方面要好得多。没有观察到严重的堵塞现象，对处理性能和水力传导性产生负面影响。建模结果在安装期一般较差，在安装后 2 年内基本适当，在柴油溢出后则有所变化。Wang-Scholz 模型在较简单的操作中表现良好。
