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 22):47-53.
Process Design of Multi-stage Water Purification System in Yuxi Chushuikou Ecological Park
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
22 22
Page:
47-53
Column:
Date of publication:
2021-11-17
- Keywords:
- sponge city; plateau with stepped slope; integrated vertical-flow constructed wetland(IVCW); water ecosystem
- 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.
Last Update:
2021-11-17