What facility is designed to allow grit to settle out of wastewater due to reduced flow velocities?

The facility designed specifically for allowing grit to settle out of wastewater due to reduced flow velocities is known as grit removal facilities. These facilities play a crucial role in wastewater treatment by using gravity to separate heavier particles such as sand, gravel, and other gritty materials from the flow.

The process typically involves a sedimentation tank where the velocity of the wastewater is intentionally reduced, allowing the heavier grit particles to settle at the bottom of the tank. This process not only helps protect downstream equipment from wear and tear caused by abrasive materials but also enhances the overall efficiency of the treatment process by ensuring that finer materials can be processed more effectively in subsequent stages.

The other options serve different functions in the wastewater treatment process: a grating facility is not a standard term used in this context; a Barminutor is utilized for the maceration of waste to break it down before treatment; and a comminutor handles the cutting and grinding of solids. None of these directly facilitate the settling of grit like grit removal facilities do.