What factor does NOT affect grease trap performance?

The correct answer indicates that the type of grease used does not affect grease trap performance significantly. A grease trap's primary function is to separate grease and solids from wastewater, which is accomplished through physical processes such as gravity and buoyancy. While different types of grease may have varying densities or melting points, the removal process primarily relies on the trap's design and operation rather than the specific type of grease.

In contrast, factors like the distance from the source to the grease trap can influence how much grease and solids reach the trap and how effectively it can function. Hydraulic loading refers to the volume of wastewater entering the grease trap, which directly impacts its ability to separate grease. Detention time, or how long the wastewater remains in the trap, is crucial because it allows sufficient time for grease to rise to the surface and solids to settle to the bottom. These factors all play a significant role in the overall efficiency and effectiveness of the grease trap, unlike the specific grease type, which is less influential in this context.