由于水溶性有机态硒及有机质的存在，准确测定土壤水溶性硒宜经浓缩、消化处理后进行。

As soil water extract contains much water-soluble organic selenium and organic matter, the determination of soil water-soluble selenium should be concentrated and digested beforehand.

youdao

未经消化的二级生活污水处理厂脱水污泥含氮4.12%，其中有机态氮占93%。

Undigested dewatered domestic sewage sludge from secondary treatment plant contained N 4.12%, of which organic form of N accounted for 93%.

youdao

结果表明，厌氧消化工艺对重金属有很好的稳定效果，其中，锌的稳定态含量由40%上升到了50%；

The research results show that this process can efficiently increase the stabilities of heavy metals, for example: the stability of zinc increases from 40 % to 50 %;

youdao