scavenger

Someone who scavenges, especially one who searches through rubbish for food or useful things.

garbage scavenger

A scavenger picked through the rubbish heap.

An animal that feeds on decaying matter such as carrion.

Vultures are natural scavengers.

A street sweeper.

A child employed to pick up loose cotton from the floor in a cotton mill.

A substance used to remove impurities from the air or from a solution.

To scavenge.

To clean the rubbish from a street, etc.