基于有效缓解基质堵塞的IVCW结构和工艺优化研究

Optimization of Configuration and Process for Effectively Mitigating Substrate Clogging in Integrated Vertical-flow Constructed Wetland

基质堵塞是潜流人工湿地在工程应用中面临的最严重的运行管理问题之一。围绕复合垂直流人工湿地(IVCW)基质堵塞问题,在系统分析导致基质堵塞的结构和工艺缺陷的基础上,研究了增加基质层深度以及增设配水管集水管和控制器的优化措施对缓解基质堵塞的效果。结果表明,结构和工艺的优化,克服了堵塞物质容易在下行池表层基质中较快累积的弊端,同时加快了堵塞物质的矿化分解。由初步的模型预测可见,结构和工艺的优化措施,使改进后的系统有效使用寿命延长至原有系统的2.77倍。

Substrate clogging is one of the most frequently encountered problems in operation of subsurface-flow constructed wetlands （SFCW）. Integrated vertical-flow constructed wetland （IVCW） is a typical SFCW consisted of two chambers, down-flow and up-flow in series. An anti-clogging solution was proposed from both configuration and process for an IVCW system by adjusting the substrate depth, introducing more distribution and catchment pipes and controllers. The results demonstrated that after the optimization of the configuration and process, the accumulation of clogging matters at the surface layer of the down-flow chamber became slow while the decomposition rate of clogging matters was accelerated. In addition, the results of the preliminarily modeling showed that the lifetime of the modified IVCW system could be prolonged to 2.77 times compared to the original IVCW system.