探析无锡某水厂取水头部水源各水质指标间的关系

Discussion on the Relationship between Water Quality Indices of Water Intake of a WTP in Wuxi

原水水质直接关系到饮用水的安全,对原水水质的监测、预判和预警,可及时进行后续工艺调整,保障安全优质供水。文章统计分析了无锡某水厂取水头部原水各项水质指标的变化趋势,发现季节交替与望虞河引水会影响原水水质指标的数值,其中,pH与藻密度和水温有一定的正相关关系;溶解氧与水温呈显著的负相关关系;藻类的生长繁殖(水体中藻类数量的变化)与水温、总氮、总磷密切相关,藻类数量与叶绿素之间总体上呈现线性正相关关系,且具有季节性特征;嗅味指标如2-甲基异莰醇(2-MIB)等与藻种类以及其密度关系较大,而浑浊度、高锰酸盐指数与氨之间无显著相关性。望虞河引水期间氯化物随着引水下降较显著;水中浑浊度、高锰酸盐指数、氨、亚硝酸盐等水质指标受引水略有波动,关联性暂不显著。

The quality of raw water is directly related to the safety of drinking water.Timely adjustment of water treatment process parameters based on the monitoring,pre-judgment and early warning of raw water quality can ensure safe and high-quality water supply.In this paper,the change trend of various water quality indices of raw water was analyzed.It was found that the raw water quality index was affected by seasonal alternation and water diversion from Wangyu River.There was a positive corelation between pH and algae density and water temperature.Dissolved oxygen was negatively correlated with water temperature.The growth and reproduction of algae density(changes in algae abundance)were closely related to water temperature,total nitrogen and total phosphorus which could lead to an increase in chlorophyll.Odor indicators such as 2-MIB were closely related to algae species and their density.Chloride decreased significantly with water diversion from Wangyu River;other water quality indices such as permanganate index,ammonia and nitrite in water fluctuated slightly,and there was no significant correlation between these water quality indices.