Chongqing University, Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Chongqing 400045, China.
Institute of Sanitary Engineering and Water Pollution Control, University of Natural Resources and Life Sciences Vienna (BOKU), Muthgasse 18, Vienna A-1190, Austria.
Sci Total Environ. 2020 Mar 15;708:134793. doi: 10.1016/j.scitotenv.2019.134793. Epub 2019 Nov 2.
Simulation and performance results of a saturated vertical up-flow constructed wetland (SVU CW) operated under different operational conditions are presented. The SVU CW consists of two different systems planted with Cyperus alternifolius and Iris pseudacorus, and each system consists of three SVU beds operated in series. The SVU CW operates in continuous aeration (CA) mode using different air-water ratios from 0.5:1 to 4:1. The aerated SVU CW achieves a high (more than 85%) removal of chemical oxygen demand (COD), ammonium (NH-N), total nitrogen (TN) and total phosphorus (TP). Furthermore, we simulate the SVU CW using the HYDRUS Wetland Module using the CWM1 biokinetic model under CA mode. According to the simulation results, aeration intensity controls the substrate distribution and growth of bacteria with depth in the SVU CW. Organic matter (OM) and nitrogen are removed in the top region (0-30 cm) of the SVU CW. The root mean square error for COD and NH-N is >1.5, whereas R is >0.99. A good match between observed and simulated data suggests that the CWM1 model is a suitable tool for simulating various processes and bacterial dynamics in aerated SVU CWs.
呈现了在不同操作条件下运行的饱和垂直上流式人工湿地（SVU CW）的模拟和性能结果。SVU CW 由两种不同的系统组成，分别种植了香蒲和菖蒲，每个系统由三个串联运行的 SVU 床组成。SVU CW 采用连续曝气（CA）模式，空气-水比从 0.5:1 到 4:1 不等。充气 SVU CW 实现了对化学需氧量（COD）、铵（NH-N）、总氮（TN）和总磷（TP）的高效去除（超过 85%）。此外，我们使用 CA 模式下的 CWM1 生物动力学模型，通过 HYDRUS 湿地模块对 SVU CW 进行模拟。根据模拟结果，曝气强度控制着 SVU CW 中细菌随深度的基质分布和生长。有机物（OM）和氮在 SVU CW 的顶部区域（0-30cm）被去除。COD 和 NH-N 的均方根误差>1.5，而 R>0.99。观测数据和模拟数据之间的良好匹配表明，CWM1 模型是模拟充气 SVU CW 中各种过程和细菌动态的合适工具。
