单项选择题
Which of the following methods might favor oil emulsion in bilge water?（）
A.Raising temperature B.less use of surfactant C.more use of solvent D.polishing device fouling prevention
单项选择题 What’s the advantage of oily water separator that meets the requirement of MEPC 60(33) over MEPC 107(49)?（）
单项选择题 Which of the following methods might be used as the treatment on emulsified oil?（）
单项选择题 When discharging bilge water, which criteria must be observed?（）
