Our food scraps travel in a manner that is not all that unlike what happens to our trash. You have come to the correct spot if you want to know where the garbage disposal waste goes.

How is food churned in the disposal?

The solid food waste is collected in a grinding chamber by the trash disposal, fixed to the sink's underside.
  • When you turn on the disposal, an impeller plate or spinning disc spins quickly, pushing the food scraps against the grinding chamber's an outside wall.
  • As a result, the meal is reduced to minute fragments, which are subsequently cleansed by water passing through openings in the chamber wall.
  • Disposals, contrary to popular belief, do not feature sharp blades. Instead, they have two dull metal "teeth" on the impeller plate.

Where does the garbage disposal waste go?

It may almost be soothing to put food leftovers in your kitchen's garbage disposal. Instead of pulling out the apple cores or potato peels, simply crush them down the drain, turn on the device, and listen to your worries magically vanish.

Naturally, the meal doesn't truly disappear. More specifically, all the water that flows through your home's plumbing goes to a nearby wastewater treatment facility once the garbage disposal has crushed them up.

Any solid food scraps made to the treatment facility are filtered and transferred to an anaerobic digestion plant, landfill, or incineration.

These three procedures are used to dispose of garbage disposal waste.

Anaerobic digestion

Without oxygen, anaerobic digestion happens when bacteria break down organic molecules and generate biogas. The procedure decreases the amount of material while also creating biogas, which may be utilized as fuel.

In the United States, sewage sludge is frequently broken down using this process at facilities for treating wastewater. There has been a push to begin adding recent years' food waste to already-installed anaerobic digesters at wastewater treatment facilities.


Waste that is not recycled or burned ends up in landfills. Landfills are specifically constructed facilities to receive trash and safeguard the environment from pollutants.

Leach-ate leakage occurs when water flows through waste in a landfill and picks up contaminants; this water then escapes into the environment and may contaminate the soil and any surrounding water sources, one environmental risk associated with landfills.

In about equal amounts, landfills release methane and carbon dioxide, which have been linked to climate change.


Incineration is a waste management technique that involves burning organic waste components. Thermal treatments refer to incinerating waste and other high-temperature waste management techniques.

When comparing the overall environmental impact of incineration plants to landfills, incineration still seems to be the "second-best" solution.

A more practical solution to our ongoing rubbish disposal problem is provided by the "4 Rs"—reusing, recycling, re-purposing, and reducing. However, a pound of raw waste is more difficult to handle than an ounce of trash that has been burned.

5 Best Smallest Garbage Disposal With Their Advantages
Waste disposal would be useful in every kitchen. They reduce the need to wait until the trash can is full before disposing of leftovers, which helps to avoid rotting and unwanted odours.

Do waste disposals protect the environment?

Waste disposals aren't as ecologically beneficial as people would think.

Although shredding food helps speed up the breakdown process, these wastes aren't being disposed of in a compost pile where they can decompose properly.

The remnants are usually hidden behind piles of other trash in landfills. If these wastes lack oxygen, they will release methane, a greenhouse gas that greatly contributes to climate change.

Waste from garbage disposals can also endanger the environment by releasing methane. A lot of water is wasted to get these leftovers to the water treatment facility through the sewage system.

If your waste is disposed of at a landfill close to water, it may also damage marine life and contaminate the ocean.

The good news is that garbage disposal solutions are just as practical and far more environmentally friendly.

Food waste in trash or garbage disposal

Always composting food waste is the greatest solution. Composting food scraps improves soil, produces garden fertilizer, and boosts plants' tolerance to drought.

Nevertheless, not everyone has a yard, and some of us lack the time or motivation to compost our food leftovers. If this is the case, you can think about seeing if there is a nearby company that would provide you with a little compost container and pick it up once a week, twice a week, or once a month.

If neither convenient nor an alternative, the best way to dispose of food leftovers is to drop them in the garbage disposal under the sink. Why? Food scraps are thrown away and taken to a landfill to degrade and release methane gas.

Although there are techniques for capturing these gases in landfills, they are not nearly as effective as those employed in wastewater treatment facilities.

Food waste processing plants provide wastewater to treatment facilities, where anaerobic digesters use it to create electricity or bio-fuels by capturing the methane gas produced during decomposition.

Some ecologically acceptable alternatives to waste disposal

Keep and consume leftovers

Keep and consume leftovers

When you can save solid food waste to eat later, why would you put it in the garbage disposal?

One of the easiest and most environmentally friendly methods to dispose of food scraps is to use the leftovers from dinner for lunch the following day.

You should still package foods like rice and pasta even if this approach doesn't work for scraps like banana peels.

Compositing outside

Compositing outside

Comparing composting versus waste disposal, composting is unquestionably the more environmentally friendly choice.

Several alternatives are available if you prefer an outside approach and have backyard space. You may set up an outdoor bin, buy a tumbling composter, or buy a vermicomposting container.

Before food spoils, freeze it

Before food spoils, freeze it

Foods that can remain in the freezer should not be sent to a water treatment facility. Many individuals think they won't consume their leftovers before they spoil, so they put them in the trash, kitchen sink, or garbage disposal.

Fortunately, you may just freeze your food to keep it from spoiling. Check out this useful freezing guide if you're not too familiar with freezing food, how temperature affects germs, or what should or shouldn't be frozen.

Make smoothies out of leftovers

Make smoothies out of leftovers.

Turning your scraps into something fresh is a common approach to reducing food waste.

You might make something wholesome and delicious out of the garbage you send to the water treatment facility in your neighborhood. For instance, spinach might be included in a smoothie for nutrition a little over its sell-by date.

There are several methods to re-purpose waste besides making smoothies. Apple cores may be made into jam or fruit pits into syrup.


There you have it! Garbage disposal is an essential household item that a professional plumber should install.

We hope this blog was very helpful to you and improved your awareness of where garbage disposal waste goes and Eco-friendly alternatives to the garbage disposal.

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