oxygen demand index的意思|示意

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。

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。

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。