水质化学需氧量、高锰酸盐指数和生化需氧量之间的关系探究

Study on the Relationship between Chemical Oxygen Demand,Permanganate Index and Biochemical Oxygen Demand

本文通过对2019~2020年某市环境监测站监测、分析的地表水水质资料的采集、整理,分析了BOD_(5),COD_(Cr),COD_(Mn)三个指标,并对三个指标的线性、内因以及指标之间的关系进行了研究。研究发现,全年化学需氧量(COD)/高锰酸盐指数(COD_(Mn))平均值为3.91、COD/五日生化需氧量(BOD_(5))平均值为4.41,以及COD_(Mn)/BOD_(5)平均值为1.14。从季节上来看,春季、夏季三个指数具有极强的相关关系,秋季和冬季仅有COD与COD_(Mn)间具有相关性,而这两者与BOD_(5)的相关性不大。

Based on the collection and arrangement of surface water quality data monitored and analyzed by a city environmental monitoring station from 2019 to 2020,this paper analyzes BOD_(5),COD_(Cr),COD_(Mn),and studies the linearity,internal causes and the relationship among the three indicators.It is found that the annual average value of chemical oxygen demand(COD)/permananate index(COD_(Mn))is 3.91,COD/5-day biochemical oxygen demand(BOD_(5))is 4.41,and the average value of COD_(Mn)/BOD_(5) is 1.14.From the seasonal point of view,there is a strong correlation between the three indexes of spring and summer,and only the correlation between COD and COD_(Mn) is found in autumn and winter,which has little correlation with BOD_(5).