The third compartment in a 3-compartment dishwashing sink should be filled with:

The third sink is the compartment to disinfect. It is an additional step to ensure that no microorganism survives the dishes or kitchen utensils.

Explanation:

There are several ways to disinfect:

- Chlorine solution: at a temperature between 75 and 100°F, between 7-10 seconds and the concentration of the solution should be between 30 and 100 ppm.

- Iodine solution: at a temperature of 75°F, for 30 seconds at a concentration between 13 and 25 ppm

Quaternary ammonium solution: temperature of 75°F, for 30 seconds, concentration between 150 and 400 ppm.