Study on Water Purification Efficiency and Influencing Factors of a Constructed Wetland in Jiaxing

Constructed wetland plays an important role in the removal of micro-polluted water pollutants urban sources. However, purification capacity and influencing factors constructed wetlands still need to be explored. This study monitored turbidity, ammonia nitrogen (NH3-N), dissolved oxygen (DO), chemical demand (COD) at inlet outlet Shijiuyang Wetland Jiaxing City from 2019 2021. The results showed that turbidity rate stayed high. DO couldn’t meet national standard III for surface during high temperature time summer, NH3-N COD are stable within III. partial regression analysis shows addition chemicals is most factor affecting turbidity. Temperature had affect DO, higher temperature, lower value DO. flow COD, rate, COD. Moreover, this paper proposes operation maintenance improvement measures problem excessive Wetland. research conducive improving understanding security Yangtze River Delta region.