A.gravity separation
B.use of adsorbents
C.use of flocculents
D.use of chemical addition
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A.Raising temperature
B.less use of surfactant
C.more use of solvent
D.polishing device fouling prevention
A.more economic
B.larger capacity on oil treatment
C.less costive
D.more capable of separating emulsified oil
A.gravity separation
B.centrifuge
C.Cyclone
D.Cross-flow membrane filtration
A.The requirement for the oil content of bilge water discharged is 15 ppm
B.No discharge in sensitive waters
C.Any discharge in sensitive waters
D.International, national or local requirements have to be observed
A.The high temperature facilitates primary gravity separation
B.Most of the oil and organic solvents are raised to the top layer
C.The high the temperature is, the more the top oil will be collected
D.The high temperature has little use on the separation of emulsified oil
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