Chemical Oxygen Demand (COD) is the representative index of sewage water.
化学需氧量(简称COD)是水质污染程度的代表性指标。
The result indicated that the main pollution target of this section is permanganate index, five days' biochemical oxygen demand and ammonia nitrogen.
评价结果表明：该段主要污染指标高锰酸盐指数、五日生化需氧量、氨氮。
Biochemical oxygen demand, BOD is necessary for water quality evaluation. It is an important index in measuring organic materials pollution.
生物化学需氧量bod是水质评价的必测项目，是衡量有机物对水质污染的重要质量指标。
The purpose of studying the correlation of total organic carbon (TOC) with permanganate index and chemical oxygen demand (COD) has been stated.
叙述了研究总有机碳与高锰酸盐指数及化学需氧量相关关系的目的。
Chemical oxygen demand is one of the important index in water monitoring. In this paper, the recent development for determination of chemical oxygen demand is briefly summarized.
化学需氧量是水质监测的一项重要指标。综述了化学需氧量的测定方法和研究进展。
Chemical oxygen demand is an integrative index for evaluating the degrees of organic pollution in water, and is also one of the important parameters in water monitoring.
化学需氧量是评价水体有机污染程度的综合指标，也是水质监测的一个重要参数。
BOD (biochemical oxygen demand) is an important index to evaluate the quality of water in environmental monitoring and sewage treatment.
即生化需氧量，是环境监测与污水处理中评价水质的一项重要指标。
BOD (biochemical oxygen demand) is an important index to evaluate the quality of water in environmental monitoring and sewage treatment.
即生化需氧量，是环境监测与污水处理中评价水质的一项重要指标。
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