人工河岸湿地对面源污染的处理效果研究

针对城市河道污染治理存在的主要问题,并考虑到华南地区河流水量、水质、水温季节性变化大的特点,构筑了人工河岸湿地试验系统,对该系统约13个月连续性运行进行了观测和研究。结果表明,平均水力负荷为15cm/d工况下,试验系统对高锰酸盐指数、SS、NH3-N、TN和TP的平均去除率分别为50%、60%、50%、35%和45%;系统对高锰酸盐指数、NH3-N和TN的去除效果随季节变化明显,夏季处理效果好于冬季;SS处理效果受季节影响不明显;TP初期处理效果好于末期。该人工河岸湿地既能较好地改善水质,又能改善生态环境、美化城市景观,是一项适合城市河道污染治理的技术。

The treatment efficiency of constructed riparian wetland on non-point source pollution

The seasonal variation of water quantity, quality and water temperature in river of South China lead to many problems in city riverway pollution control. A constructed riparian wetland experimentation system was es-tablished to deal with the problem of non-point source pollution. The performance of the system was observed and studied during 13 months of operating. The result indicated that the system was stable, and the removal rates of COD, SS, NH_3-N, TN and TP were 50%, 60%, 50%, 35% and 45%, respectively. The performance of system presented obvious seasonal variation. COD, NH_3-N and TN removal efficiency in summer was better than that in winter; the removal of SS was not significantly affected by season change; TP treatment efficiency was better in for-mer stage than in latter stage. The constructed riparian wetland could purify water quality, restore ecological environ-ment and embellish urban environment, so it was a feasible technology for urban riverway pollution treatment.