How Do Disposal Work

How a Garbage Disposal Works. … When you turn on the disposal, a spinning disc, or impeller plate, turns rapidly, forcing the food waste against the outer wall of the grinding chamber. This pulverizes the food into tiny bits, which then get washed by water through holes in the chamber wall.

Where does the food from the garbage disposal go?

Food scraps that are processed through the disposal travel with the wastewater to the treatment plants where anaerobic digesters capture the methane gas produced during decomposition and convert it to electricity or biofuels.

Does a garbage disposal need its own P trap?

The plumbing code has a lot of regulations, but none is as important as this one: Every drain must have a P-trap. Shower and tub drains have to have them, toilets have built-in traps and sink drains must have them, even those with garbage disposals.