pollutant substance 污染物质
organic pollutant substance 有机污染物
degradation of pollutant substance 污染物降解作用
The main pollutant of this kind of sewage is oils, polluter of the suspended substance and dissolving organic matter.
这类污水的主要污染物是油类、悬浮物污染物质及溶解性有机物。
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