例句 /

After several days' impact of the urban life organic rubbish detest oxygen ferment natural pond liquid, COD removal rate is rising obviously and over 80% with the trained detest sludge.

After several days' impact of the urban life organic rubbish detest oxygen ferment natural pond liquid, COD removal rate is rising obviously and over 80% with the trained detest sludge.

使用原水后,培养好的厌氧污泥经几天的冲击,去除效果明显回升,COD去除率可达80%以上。