Abstract: A filtration system is provided for removing oil and/or hydrocarbons from blige water that collects in the blige of a marine vessel to ensure discharge of oil-free water into the surrounding waters of the vessel. The filtering medium of the system is composed of a mixture of peat, anthracite and bentonite resulting in a composition that is hydrophobic and olephilic. Due to the chemical composition of the medium, it burns efficiently and can be disposed of in the onboard incinerators of the vessel producing over 17,000 BTU's per pound. Also, the filtration system employs full backwash capability for filtering liquids combined with particulates.