Environmental Engineering Division, Department of Hydraulic, Maritime and Environmental Engineering, Technical University of Catalonia, c/Jordi Girona 1-3, Building D1, 08034 Barcelona, Spain.
Water Res. 2011 Jun;45(12):3579-89. doi: 10.1016/j.watres.2011.03.049. Epub 2011 Mar 31.
The effect of both the type of primary treatment (hydrolitic up-flow sludge blanket (HUSB) reactor and conventional settling) and the flow regime (batch and continuous) on clogging development in subsurface flow constructed wetlands (SSF CWs) was studied. Clogging indicators (such as accumulated solids, hydraulic conductivity and drainable porosity) were determined in an experimental plant with three treatment lines. Correlations were encountered between the solids accumulated and both saturated hydraulic conductivity and drainable porosity reduction over time (74.5% and 89.2% of correlation, respectively). SSF CW implemented with a HUSB reactor accumulated ca. 30% lower sludge (1.9 kg DM/m(2)) than a system with a settler (2.5-2.8 kg DM/m(2)). However, no significant differences were recorded among treatment lines concerning hydraulic parameters (such as hydraulic conductivity or porosity). Root system development contributed to clogging. Accordingly, planted wetlands showed between 30% and 40% and 10% lower hydraulic conductivity and porosity reduction, respectively, than non-planted wetlands.
研究了原处理类型（水解上向流污泥床（HUSB）反应器和常规沉淀）和流动状态（间歇和连续）对地下流人工湿地（SSF CW）堵塞发展的影响。在一个具有三个处理线的实验工厂中确定了堵塞指标（如累积固体、水力传导率和可排水孔隙率）。随着时间的推移，固体积累与饱和水力传导率和可排水孔隙率的降低之间存在相关性（分别为 74.5%和 89.2%的相关性）。采用 HUSB 反应器的 SSF CW 积累的污泥（1.9kg DM/m2）约比采用沉淀池的系统低 30%（2.5-2.8kg DM/m2）。然而，在水力参数（如水力传导率或孔隙率）方面，各处理线之间没有记录到显著差异。根系发育促成了堵塞。因此，与未种植湿地相比，种植湿地的水力传导率和孔隙率降低分别低 30%至 40%和 10%。
