Refuse/oil removing device and refuse/oil recovery bag

A refuse/oil recovery system comprising:

• a grease trap including a engaging unit disposed thereon or a device provided with said grease trap;
• and
• a bag for the recovery of refuse and oil contained in drainage introduced to said grease trap, said refuse/oil recovery bag comprising
• a base portion having rigidity so as to form a plate, and including a drainage introducing hole, said base portion being engaged with said engaging unit disposed on said grease trap or said device provided with the grease trap, and
• a bag portion having a plurality of water passing holes and a plurality of layers, said bag portion fixed to said base portion such that a circumference of said hole of said base portion is covered with an opening of said bag portion, and
• wherein said plurality of layers includes a first outer layer, a second outer layer and an inner layer, and a first space is disposed between said first outer layer and said inner layer and a second space is disposed between said second outer layer and said inner layer,
• wherein a grasping hole is disposed in said base portion, and
• wherein said refuse/oil recovery bag is configured to be replaced after use thereof.