高盐有机化工废水中COD与TOC的相关性

以COD为指标评价废水的有机物污染程度存在诸多不足，而TOC能更好地反映废水中有机物的含量。以高盐有机化工废水为研究对象，利用多级活性炭吸附工艺对其进行预处理，对原水、吸附出水、再生液中COD与TOC的相关性进行了分析。分析结果表明：在一定范围内，原水COD与TOC满足关系式COD = 56.537 7+ 0.967 04TOC；废水在吸附处理过程中，COD与TOC仍呈线性相关关系，但不同工段需各自建立独立的回归方程；TOC测定结果的精密度较好，且远优于COD直接测定的精密度，回收率范围98.59%~110.69%；利用线性回归方程根据TOC测定结果预测COD，预测结果准确、可靠、精密度好。

Correlation between COD and TOC in high-salinity organic chemical industrial wastewater

There are many deficiencies of COD index in evaluation of organic pollution wastewater，while TOC can better reflect the content of organic compounds in wastewater. The high-salinity organic chemical wastewater was pretreated by the process of multi-stage adsorption with activated carbon，and the correlation between COD and TOC in wastewater，adsorption effluent and regeneration fluid was analyzed. The results showed that：COD and TOC met the relationship COD=56.537 7+0.967 04TOC；During the process of adsorption，COD and TOC were still linearly related，but independent regression equations should be established for different stages；The precision of TOC determination was better than that of COD，and the recoveries ranges from 98.59% to 110.69%；According to the linear regression equations，TOC determination data could be used for COD prediction with accurate，reliable and good-precision results.