垂直流人工湿地水力学特点对污水净化效果的影响

通过在污水中加入示踪剂,研究了人工湿地的水力学特点及其对污水净化效果的影响规律.结果表明,影响水力学各特点的主要原因是湿地植物根系所造成的物理学和生物学上的效应.水力学各特点与污水净化效果之间存在着密切关系:出水快、出水量大的系统具有较好的净化效果;除无植物系统外,停留时间较长的系统有较好的净化效果;容水体积大的系统净化效果也较好;水力负荷则主要通过影响其他各水力学特点而影响净化效果.结果表明,对水力学特点的优化将极大地促进污水净化效果的提高.

The Influence of Hydraulic Characteristics on Wastewater Purifying Efficiency in Vertical Flow Constructed Wetlands

The hydraulic characteristics of vertical flow constructed wetlands was investigated, and the influence of these characteristics on wastewater purifying efficiency was studied as an emphasis. The results of the experiments in small scale plots and medium scale plots showed the plant roots, with the physical and biological effects, play a significant role in hydraulics and the wastewater purifying efficiency. The other characteristics such as retention time, effluent velocity and influent load also directly affect the wastewater purifying efficiency of constructed wetland. To get a better understanding of the hydraulics will be crucial to the improvement of purifying efficiency and facilitate the practical use of constructed wetland.