In order to solve the problem of poor urban river water bodies in the northern regions,an amalgamated methodology involving the"Ecological gravel bed+broken stones wetland system"has been implemented.This process facilitates the purification of surface water within wetlands.The outcomes underscore the pronounced efficacy of this approach in ameliorating Class Ⅴ water bodies within northern urban contexts.Noteworthy attributes encompass a robust resistance to impact and mitigation of the influence of winter temperatures on wetland operations.Under conditions where the influent water exhibits COD ≤ 80 mg/L,NH3-N ≤ 3.0 mg/L,and TP ≤ 0.6 mg/L,the system yields average removal rates of 59.54％,60.62％,and 33.42％for COD,ammonia nitrogen,and total phosphorus(TP),respectively.Effluent quality conforms to the prescribed limits for Class Ⅴ water bodies as stipulated in the"Surface Water Environmental Quality Standards"(GB 3838-2002).Consequently,an annual reduction in COD emissions by 1 204.50 tons,ammonia nitrogen emissions by 40.15 tons,and TP emissions by 8.03 tons is achieved,manifesting a conspicuous enhancement of the ecological milieu of the river.
关键词
劣Ⅴ类水体/生态砾石床/植物碎石床
Key words
Class Ⅴ poor water bodies/Ecological gravel bed/Plants broken-stones bed
维普
万方数据