Comparison of Manual and Instrumental Methods for Measuring Chemical Oxygen Demand(COD)in Water Quality Testing of Sewage Treatment Plants
Chemical oxygen demand is one of the important routine parameters in the water quality testing of sewage treatment plants,mainly reflecting the degree of organic pollution in water bodies and the treatment effect of sewage treatment plants.With the increasingly serious pollution of water bodies by organic matter,the determination of chemical oxygen demand in sewage is receiving more and more attention,and the requirements for the determination results are also increasing.This article compares the accuracy and precision of manual and instrumental methods for determining chemical oxygen demand in water quality using four certified standard substances in two concentration ranges,in accordance with the requirements of the standard HJ 828-2017 Determination of Chemical Oxygen Demand in Water Quality-Dichromate Method.The relative deviation of the two measurement methods is also compared by measuring the chemical oxygen demand of inlet and outlet water samples from sewage treatment plants.
chemical oxygen demandwater quality testinghandmade methodinstrument method
NETL
NSTL
万方数据
