南水北调水厂原水藻类应急处理模式研究

Study on Emergency Treatment Mode of Algae in Water Plant Raw Water of the South-to-North Water Diversion Project

近两年南水北调中线水源藻类大幅增加,导致沿线供水厂进水系统堵塞,处理水量急剧减少,严重影响供水厂正常运营。南水北调水厂原水藻类应急处理措施大多均采用物理法过滤拦截和化学法氧化处理相结合的应急组合处理措施有效去除了藻类污染。不同地区、不同类别的项目针对原水突发藻类所采取的应急处理模式有所差异,其中运营类水厂大多数是通过加装人工格栅网并辅助化学药剂预氧化处理藻类污染,运营维护简单且费用相对较低。而建设类水厂则通过工艺改造,专门建设拦藻除藻工艺设施和设备,较多地采用机械格栅与人工格栅互相切换的模式,通过物理法过滤拦截和化学法氧化处理相结合的应急组合处理措施,一次性工程投入永久性解决藻类等水质污染隐患。

In the past two years,the algae in the water source of the mid-route of the South-to-North Water Diversion Project has increased significantly,which has led to the blockage of the intake of the water supply plant,and the sharp reduction of the treated water volume,and seriously affected the normal operation of the water supply plant.Most of the emergency treatment measures of algae in water plant raw water of South-to-North Water Diversion Project are the combination of physical filtration and interception and chemical oxidation treatment to effectively remove algae pollution.Different areas and different types of projects adopt different emergency treatment modes for raw water algae outbreaks.Many of the water plants in operation install artificial grid and auxiliary chemical agents to pre-oxidize algae pollution,which is simple in operation and maintenance with relatively low cost.The water plants under construction install special facilities for interception and removal of algae,such as mechanical grid and artificial grid switch mode.By taking the physical method of filtration interception and chemical oxidation treatment combined emergency combination treatment measures,the algae and other water pollution hazards could be solved permanently.