2013-2018年广州市穗北水厂水质监测结果分析

目的 了解广州市穗北水厂生活饮用水的水质卫生状况,为水源水的综合治理、水厂改进水处理工艺以及饮用水水质管理措施等提供科学依据。方法 参照《生活饮用水标准检验方法》(GB/T 5750-2006)检测广州市穗北水厂2013-2018年水源水、出厂水和管网末梢水中指标水平,检测样品数分别为24、24和21宗,检测指标数分别为672项、1264项和837项。结果 2013-2018年水源水、出厂水和管网末梢水的检测项目合格率分别为91.5%(615/672)、100.0%(1264/1264)和100.0%(837/837);水源水枯水期和丰水期的项目合格率为92.6%(311/336)和90.5%(304/336),差异无统计学意义(〖XC小五号.EPS;P〗=0.293,P=0.588);水源水主要不合格的项目为耐热大肠菌群、氨氮、铁、锰和汞;出厂水(1.36±0.39mg/L)和管网末梢水(1.22±0.36mg/L)中耗氧量水平低于水源水(2.24±0.73mg/L),出厂水中的氯化物(13.50mg/L vs 8.93mg/L)、硝酸盐(1.99±0.75mg/L vs 1.45±0.60mg/L)和硫酸盐(21.15±5.21mg/L vs 9.45±2.87mg/L)水平高于水源水,管网末梢水中游离余氯含量低于出厂水(0.25mg/L vs 0.61mg/L)。结论 广州市穗北水厂水质卫生状况较好,应加强对水源水的综合治理,水厂应根据水源水、出厂水的实时监测数据及时调整饮用水处理工艺,同时,需要加强输配管道建设以及养护管理。

Drinking water quality of Suibei water plant in Guangzhou,2013-2018

Objective To analyze the drinking water quality of Suibei water plant,and to provide scientific evidence for the comprehensive treatment of source water,so as to improve water treatment processes and measures for the management of water quality.Methods The indicators were tested according to the Standard Examination for Drinking Water(GB/T 5750-2006).The numbers of the tested samples were 24,24 and 21,respectively.And the detection index numbers were 672,1264 and 837,respectively.Results The qualified rates of source water,factory water and pipe network peripheral water were 91.52%(615/672),100%(1264/1264)and 100%(837/837),respectively.The qualified rates of source water in the dry season and wet season were 92.56%(311/336)and 90.48%(304/336)(P=0.588).The main indicators of disqualification were Thermotolerant Coliform Bacteria,Ammonia Nitrogen,Iron,Manganese,Mercury and so on.The levels of Chemical Oxygen Demand(COD)in factory water(1.36±0.39mg/L)and pipe network peripheral water(1.22±0.36mg/L)were lower than that of source water(2.24±0.73mg/L).The levels of chloride,nitrate and sulfate in factory water were higher than that of the source water.And the residual chlorine in pipe network peripheral water was lower than factory water.Conclusion The water quality of this water plant is good.The relevant departments should strengthen comprehensive treatment to the water source.The plant should timely adjust water treatment process according to the real-time monitoring data,and it is necessary to strengthen pipeline construction and maintenance management.