A kitchen sink garbage disposal or called food waste disposer(FWD)is a device, usually electrically powered, installed under a kitchen sink between the kitchen sink's drain and trap. the kitchen food waste disposer grinds these soft food waste into small tiny pieces,generally in less than 2mm,to pass through the plumbing and flow out.
Garbage disposals unit were invented by American architect John H Hammes in Racine , Wisconsin in 1928. Hammes came up with the idea in his basement because he wanted to make kitchen cleanup work easier for his wife – he wanted to solve the one major inconvenience of a kitchen, disposing of food waste.
Eleven years of testing and development followed the creation of Hammes' initial garbage disposal unit. According to the Racine Sunday Bulletin: "As the years went on, he made different models and tried them out in his own kitchen sink. The house in which they were living at this time had a cesspool in the back yard, and John would put on his hip boots and wade in the ground waste to check the size of the particles after grinding in the hand-made disposer."
By 1935 Hammes had perfected and patented the appliance which operates on the principle of centrifugal force to pulverise food waste against a stationary grind ring so it would easily flush down the drain. In 1938, he established Insinkerator, a company which is now the largest manufacturer of food waste disposers. By the late 1950s, kitchen garbage disposal became an integral part of the modern American kitchen and are now used in 50% of homes and in some major cities their use is mandatory as part of an overall environmental programme.