东阳市江滨景观带湿地公园人工湿地填料的设计与施工

填料是人工湿地系统组成中不可取代的部分,对人工湿地去污效果起到关键作用。填料的设计与施工直接关系到工程的质量与运行效果。东阳市江滨景观带湿地公园在设计环节采用了8种规格的砾石,通过试验确定在工程中掺加了11%左右的粒径为4～6 mm的沸石填料,强化尾水脱氮效果,并在设计中通过设置交替运行的湿地单元实现沸石的生物再生。在施工环节,针对常规料场生产工序,优先选择振动筛,并优化了设备运行参数,同时,加强清洗环节,确保提供洁净度更高的不同级配要求的填料。在铺设环节,优化了设备选择和工序组合,提高了摊铺效率。该项目在填料设计与施工方面的经验,为大型潜流人工湿地工程提供了重要的案例参考。

Design and Construction of Filler in Constructed Wetland Park in Jiangbin Landscape Belt of Dongyang

Filler is one of the important parts in constructed wetlands, which plays a significant role in wastewater treatment. The design and construction processes have a direct bearing on the quality and operation effect of the overall project. In the design of Jiangbin Wetland Park in Dongyang City, 8 kinds of gravel were used in the design process. The test results showed that about 11% zeolite filler with diameter of 4 - 6 mm was added to the project to enhance the effect of denitrification in tail water. In the design, the biological regeneration of zeolite was realized by setting alternate wetland units. In the construction process, the vibrating screen was selected first for the production process of the conventional material yard, and the operation parameters of the equipment were optimized. At the same time, the cleaning procedure was strengthened to ensure that the fillers with higher cleanliness and different grade requirements were provided. In the laying process, the equipment selection and working procedure combination were optimized, and the spreading efficiency was improved. The experience in filler design and construction provided an important case reference for large subsurface flow constructed wetland project.