Large grease generators in the kitchen are the pre-rinse sinks and the pot-washing sinks. Grease comes from the food residue that is on used plates and cookware. The biggest generator of grease is the three-compartment sink, where a lot of the pots and pans are washed.Surprisingly, very little grease comes from the dishwasher. Plates and cookware have grease and food residue scraped/rinsed off at the pre-rinse station before they go into the dishwasher.
Any grease that does come out of a dishwasher is emulsified grease. Grease emulsifies due to the high concentration of detergents and high strength soaps that dishwashers utilise. Emulsified grease cannot be trapped.