经过3个阶段的选择和富集，反硝化聚磷菌在聚磷菌中的比例从15 %上升到73% 。

The proportion of DNPAOs increased from 15.5% to 73% of total phosphate accumulating organisms after three phase selection.

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通过多次反萃取可以提高锡的回收率，达到了微量锡与微量锗分离富集的目的。

As stripping trace tin time after time, the rate recovery of tin can be increased, and achieved the aim of the separation and enrichment of trace tin and trace germanium.

youdao

通过多次反萃取可以提高锡的回收率，达到了微量锡与微量锗分离富集的目的。

As stripping trace tin time after time, the rate recovery of tin can be increased, and achieved the aim of the separation and enrichment of trace tin and trace germanium.

youdao