The bilge waste water is treated by a cloth made of the non-woven fabric of a chemical fiber such as polyester and activated carbon produced when a disposal tire is burned, thereby efficiently separating a polluted substance such as an oil content, a suspended n-hexane extract, COD and SS in the bilge waste water to remove them efficiently and economically. ビルジ廃水をポリエステル等の化学繊維の不織布から成るろ布と、廃棄タイヤを燃焼させる際に産生される活性炭で処理することにより、効率的、かつ経済的にビルジ廃水中の油分や懸濁しているn−ヘキサン抽出物、COD、SSなどの汚濁物質を効率的に分離除去するように構成される。 - 特許庁