The sources of contamination of fresh and seawater are most often spills of oil and oil products by accidents with tankers or underwater pipes, as well as offshore oil platforms and oil refineries. Moreover the ships produce a large amount of oily wastewater such as bilge water which needs to be treated prior to being discharged. The bilge water is a difficult wastewater to treat as it contains seawater, particulates, used oils and detergents. Micro- and ultrafiltration are often the methods of choice to treat this water. The pretreatment of this oily wastewater prior to ultrafiltration is desirable, as the used oils and particulates can block the feed channels of the ultrafilters spiral and hollow fiber modules. In this reason, at the last time different hybrid adsorbents with high adsorption capacity and appropriate porous structure are used.