Abstract:

Both COD and TOC can be used for characterizing the organic contaminant level of coking wastewater.In theory,there is a linear relation between these two indicators.The linear regression relation of them in coking biochemical effluent has been studied by mathematical statistics.And conversion equation between these two indicators is established.The results of t-test method show that the linear relation of COD and TOC is significant.When the confidence level is 95%,the simple regression equation obtained is superior to COD measured value with high precision and accuracy.And,under certain conditions,TOC can be used for converting into COD indirectly.

Key words: biochemical effluent, organic contaminants, chemical oxygen demand, total organic carbon

摘要：

COD及TOC均可用来表征焦化废水有机污染程度,理论上二者存在一定的关系。采用数理统计方法研究了焦化生化外排水中TOC和COD的线性回归关系,建立了TOC对COD的转换方程,t检验法检验结果表明,焦化生化外排水中COD和TOC线性关系显著。在置信度为95%的条件下得出的一元线性回归方程,在精密度和准确度上均优于COD实测值,在一定条件下,可使用TOC来间接换算COD。

关键词: 生化外排水, 有机污染物, 化学需氧量, 总有机碳

CLC Number: 

• O661

• X832