Garbage Disposals – What are they?

Garbage disposals are machines that grind food wastes into pulp. They are mostly used in the United States of America and are rarely seen anywhere else in the world (maybe Canada). It basically consists of a motor, an impeller, a grinding ring and cutters (usually swivel type) attached to the impeller. It doesn’t use any kinds of blades, instead, when the impeller rotates the particles grind against the grinding ring which is fixed to the wall of the grinding chamber. The swivel cutters also help the grinding process. Given below is a video which you can refer to see how a garbage disposal work;

Refer the below picture to get an idea of what a garbage disposal consists of;


Garbage disposals are attached to kitchen sinks. The food that is ground goes along with the water from the sink to the waste disposal area, which is a septic tank in these cases. Water has to be run continuously during the operation of most of the disposal for its smooth working.

There are two types of garbage disposals; continuous feed and batch feed. For the continuous type you can continuously add food wastes into the grinding chamber (the food wastes are added through the sink hole). For batch feed type disposals the food wastes are added to the grinding chamber batch by batch. The continuous feed types are more popular type owing to their ease of use.

Garbage disposals vary in power. The power of a usual household garbage disposals ranges from 1/3HP to 1HP. Anything more powerful is totally unnecessary.  They also vary in grinding chamber capacity and the quality and number of grinding components also vary with price. Some top end garbage disposals have a multi-grind system where the food wastes are ground through different stages whereas cheaper ones have only a single cutting stage.

How does this post help mechanical engineering students?

Garbage disposals are widely used in the USA. But it is a machine that has immense scope in cities of India and other countries. In most Indian cities, both small and large, waste disposal is a large problem. Often food wastes rot near public roads, and there is no place to dispose of them properly. Using garbage disposals one can easily grind all the food wastes into pulp and send it to the drainage. This not only reduces the amount of wastes sent to landfills but also reduces the production of Methane gas which is harmful to the ozone layer of Earth.

The working and construction of this machine is very simple and is suitable for a project. You can read more on garbage disposals here;

DisposalXT – Garbage disposal guide


11 thoughts on “Garbage Disposals – What are they?”

  1. Ansa Raymond Reply
    December 28, 2017

    Hello, I would like to get more information on this topic. Please send to me

  2. abdul Reply
    December 16, 2017

    i want this project details

  3. Subas Raj Regmi Reply
    November 20, 2017

    i am a final year student .it’s a good project i would like to know more about this please send me more information .

  4. Deep singh Reply
    November 4, 2017

    I am a final year student. It’s a good project and I like it. and I want to work on this project please send me more details.
    Thank you

    November 2, 2017

    Greetings to you.! I’m a 3rd year mechanical student and I would like to make this garbage disposer as my mini project and I’m also interested to work on would you be able to send the complete details of this project to my mail..thanking you.

  6. Mahabir Singh Reply
    August 22, 2017

    I’m final year student. I like this gerbage disposal concept . So i want to make project in this concept so plz send me all details in my email….thanksss

  7. Anand Vinayak Reply
    August 16, 2017

    All information can give my

  8. Kasim Reply
    August 5, 2017

    I m degree engineering student ..I like your concept based on garbage.. I m working on your concept…sp pls give me some detail about your concept…

  9. Shalaka nalawade Reply
    July 26, 2017

    How can i know more about garbage disposal?? Plss help

  10. Dhaval Ponda Reply
    July 9, 2017

    I want to work on this garbage disposal. Can you please send me whole details. Thank you.

  11. Elias Henry Reply
    June 19, 2017

    I think it is the best for African mechanical students to do.

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