LI Liang,LIU Long-zhi,WU Hao,et al.Process Design of Multi-stage Water Purification System in Yuxi Chushuikou Ecological Park[J].China Water & Wastewater,2021,37(22):47-53.
玉溪市出水口生态公园多级水系净化系统工艺设计
- Title:
- Process Design of Multi-stage Water Purification System in Yuxi Chushuikou Ecological Park
- Keywords:
- sponge city; plateau with stepped slope; integrated vertical-flow constructed wetland(IVCW); water ecosystem
- 摘要:
- 出水口生态公园是玉溪市海绵城市建设的重点项目，具有典型的高原阶梯型坡地特征。改造前公园作为天然的海绵体，未能发挥绿地水域的调蓄净化功能，且水体水质为劣Ⅴ类。改造过程中利用阶梯地形，遵循水文特性，分层级构建了“多效澄清预处理—复合潜流人工湿地—水生态系统”重力流水质净化系统，形成顺畅通达水体海绵，年径流总量控制率达93%。该净化系统具有良好的脱氮除磷效果，公园水体主要指标稳定优于地表水Ⅳ类标准，NH3-N低于0.1 mg/L，TP低于0.05 mg/L。
- Abstract:
- Chushuikou Ecological Park is a key project of sponge city construction in Yuxi City, which has the characteristics of a typical plateau with stepped slope. Before reconstruction, the park, as a natural spongy body, failed to perform the regulation, storage and purification function of green space, and the water quality could not meet surface water level V standard. In the process of reconstruction, stepped topography was used and hydrological characteristics were followed, and a gravity flow water purification system of “multi-effect clarification pretreatment, integrated subsurface flow constructed wetland and water ecosystem” was constructed in different levels. The water sponge with smooth access was formed, and the total annual runoff control rate reached 93%. The whole purification system had a good nitrogen and phosphorus removal performance. The main indicators of the park water body were stable and better than the surface water level Ⅳ standard. NH3-N was less than 0.1 mg/L, and TP was less than 0.05 mg/L.
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