WANG Xiang,ZHU Zhao-jun,ZHANG Jin-ju,et al.Application of Ex-situ Composite Constructed Wetlands in River Purification[J].China Water & Wastewater,2021,37(14 14):137-141.
Application of Ex-situ Composite Constructed Wetlands in River Purification
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
14 14
Page:
137-141
Column:
Date of publication:
2021-07-17
- Abstract:
- Constructed wetlands are often suffering from poor operation effect, easy blockage and low impact load resistance in the northern cold regions. In terms of these problems, a combined process of biological aeration pond, surface flow constructed wetland, composite vertical flow constructed wetland and stable pond are utilized in a river channel of Henan Province for advanced treatment of its water body, and the designed treatment capacity could reach to 12×104 m3/d. The operation results in 2019 showed that the effluent quality could still reach or surpass the level Ⅳ criteria in Environmental Quality Standards for Surface Water (GB 3838-2002) even under the condition of unstable influent quality, and the average removal percentage of COD, NH3-N and TP were 39.52%, 55.53% and 35.97%, respectively. This technology could provide reference for managing micro-polluted river, especially in the areas short of in-situ ecological restoration lands, with high raising water quality standard and great fluctuation of water quantity.
Last Update:
2021-07-19