Design of Changxing Constructed Wetland for Advanced Purification of Reclaimed Water In Beijing
To solve the problem of total nitrogen in reclaimed water not meeting the water quality requirements for high-function river or lake ecological water supply,the Changxing wetland was taken as an example for deeply purify the reclaimed water of Xiaohongmen which replenishes the Yongding river in Beijing.This process applied the combined process of"near-natural wetland+submerged bio-filter"that uses oligotrophic bacteria-carrying biofilm filler and sulfur autotrophic denitrification filler to enhance the denitrification performance of the main processs,solving the problem of insufficient total nitrogen(TN)removal in traditional wetlands.After operation,the removal rat of total nitrogen(TN)was expected to exceed 25％,and the removal rat of other main pollutants(chemical oxygen demand(COD),ammonia nitrogen(NH3-N)and total phosphorus(TP))was expected to exceed 33％.The water quality will meet the water supply requirements,the regional water ecological system can be restored as well.The project can provide practical reference for the purification of reclaimed water ecological recharge water sources in rivers and lakes with high functional requirements.
万方数据
维普
