Which of the following methods can not remove the non-separable emulsified oil in bilge water?（）<br>A:gravity separation<br>B:use of adsorbents<br>C:use of flocculents<br>D:use of chemical addition

Which of the following methods can not remove the non-separable emulsified oil in bilge water?（）
A:gravity separation
B:use of adsorbents
C:use of flocculents
D:use of chemical addition

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