Which component is not treated by a grease trap?

The function of a grease trap is to capture and separate fats, oils, and grease (collectively referred to as FOG) from wastewater before it enters the main sewage system. Grease traps work by allowing water to flow through while trapping the less dense materials like oils and grease that float to the top, and the denser solids that settle to the bottom.

A primary role of the grease trap is therefore to manage oil and grease, as well as some solid particles. However, the term "organic waste materials" encompasses a broad range of substances, including biodegradable materials like food scraps and certain organic matter, which the grease trap does not specifically target for treatment. Instead, these organic wastes are typically processed subsequently within the broader wastewater treatment system.

Consequently, while a grease trap can deal with certain solid particles, it is not designed to treat all organic waste materials, making it the correct choice in this context.