净水厂在城市湖泊入湖河流水质保护工程中的应用

Application of Water Purification Plant in Water Quality Protection of Rivers into the Urban Lake

徐州市通过建造南望净水厂提升入湖河流的水质,进而保护云龙湖的水质。南望净水厂采用"高锰酸钾预氧化+管道混合+机械絮凝+气浮+生物陶粒石英砂过滤+紫外消毒"的工艺,从玉带河上游取水,处理后排入下游。相比于进水,净水厂对TP、COD_(Mn)和浊度分别削减了61.5%、32.9%和60%,TN含量基本没有变化,而氨氮的浓度有所升高。从近年来云龙湖的水质指标监测结果看,南望水厂的建设运行对云龙湖水质提升发挥了积极的作用。

In order to protect Yunlong lake water quality in Xuzhou city, a water purification plant named Nanwang was built to improve water quality of rivers into the lake. The treatment process of ＂potassium permanganate pre-oxidation ＋ pipeline mix ＋ mechanical flocculation ＋ air floatation ＋ biological ceramsite quartz sand filtration ＋ ultraviolet disinfection＂ was used in Nanwang water purification plant. Its inflow was pumped from the Yudai fiver upstream, and then discharge downstream after treatment. The removal of TP, potassium permanganate index and turbidity was 61.5% , 32.9% and 60% respectively. While the influent TN content was kept almost constant, and the concentration of ammonia nitrogen increased. In recent years, it is shown from the monitoring results of water quality in Yunlong lake that Nanwang water purification plant has played a positive role in water quality protection.