强化老旧水厂常规处理工艺优化提升出水水质

老旧水厂因场地限制,通过改造现状工艺池组提升水质存在困难。因此,通过强化常规处理工艺,增加应急投加系统,对提高老旧水厂出水水质以及应对突发性污染有重要作用。某水厂采用常规处理工艺,水源水为沧江河支流,原水水质为地表Ⅲ类水标准,受周边环境的影响以及存在突发性水质污染的情况,短时会达到Ⅴ类水质指标,常规工艺难以处理。通过将虹吸滤池改造成炭砂滤池,并增加粉末活性炭和高锰酸钾应急投加系统来应对微污染及进行应急处理,能有效提高供水安全保障能力。改造后出厂水TOC下降48.28%,耗氧量下降18.49%,三氯乙醛下降81.41%,应急处理NH₃-N能力提高56.79%。

Optimizing and Improving Effluent Quality by Strengthening Conventional Water Treatment Process in an Aging Waterworks

It is difficult to improve the water quality of aging waterworks by reforming the existing process tank due to site constraints.Therefore,it plays an important role in improving the effluent quality of aging waterworks and coping with sudden pollution by strengthening conventional water treatment process and increasing an emergency dosing system.For a certain waterworks,which takes raw water quality as levelⅢof Environmental Quality Standards for Surface Water(GB 3838-2002)from a tributary of the Cangjiang River,it is difficult to cope with sudden pollution by surrounding environment when the water quality deteriorated to levelⅤ.The water supply safety can be effectively improved by transformation of siphon filter into carbon-sand filter,as well as addition of powdered activated carbon and potassium emergency dosing system.The effluent TOC decreased by 48.28%,the effluent CODMn decreased by 18.49%,the effluent trichloroacetaldehyde decreased by 81.41%,and the emergency treatment capacity of NH3-N increased by 56.79%after transformation.