再生水景观水体水质保障的GFH+BF处理系统

Reclaimed Water Quality Control for Landscape with GFH + BF Treatment System

采用GFH+BF处理系统开展再生水景观水体水质保障研究,以GFH(granular ferric hydroxide)出水为人工湖源水,以BF为湖水净化补给枢纽.结果表明,GFH对TP、DOM(dissolved organic matter)和N等污染物都有很好的去除效率,TP、NH 4+-N、NO 2--N、DOC、UV254和色度的去除率分别为89.8%、23.3%、58.7%、17.6%、26.1%和41.2%;GFH出水进入人工湖后,TP和NH 4+-N浓度有所升高,NO 2--N和NO 3--N则作为氮源被蓝藻吸收,去除率分别为68.3%和84.9%;BF系统作为人工湖水体的净化系统,能够去除33.0%TP、39.5%NH 4+-N、42.2%NO 3--N、26.0%TN;BF含水层多孔介质内部微生物降解作用还可以去除24.5%DOC、12.1%UV254和33.0%色度.GFH+BF处理系统大大降低了再生水和湖水中各类污染物浓度,实现了湖水的水力循环,可有效控制湖体富营养化的发生.

In order to control reclaimed water quality for landscape,GFH ＋ BF treatment system was studied.In the experiment,GFH effluent was the inlet water of artificial lake,and BF was used as core process for contaminants removal and lake water supplying.The results showed that GFH could reduce TP,DOM and N very effectively,the removal rates of TP,NH 4＋-N,NO 2--N,DOC,UV254 and color were 89.8%,23.3%,58.7%,17.6%,26.1% and 41.2%,respectively.After GFH effluent flowing into artificial lake,the concentrations of TP and NH 4＋-N increased slightly.NO 2--N and NO 3--N were nitrogen source for the growth of cyanobacteria and the removal rates were 68.3% and 84.9%,respectively.Bank filtration removed 33.0% TP,39.5% NH 4＋-N,42.2% NO 3--N,26.0% TN,24.5% DOC,12.1% UV254 and 33.0% color for landscape water.In conclusion,＂GFH ＋ BF＂treatment system reduced contaminants greatly from reclaimed water and landscape water,and lake water cycle was achieved,which could avoid eutrophication of landscape effectively.