Final answer:
The term "supernatant" in water treatment refers to the clear liquid that remains above a sediment or precipitate after the sedimentation process.
Step-by-step explanation:
The term "supernatant" refers to the liquid located above a sediment or precipitate after the process of sedimentation in water treatment. During this process, solid particles known as floc settle to the bottom of the water supply due to their weight and are subsequently removed. The clear water that remains above the settled floc is referred to as the supernatant. This clear water then flows to a filtration unit where further purification takes place. The significance of the supernatant is that it is the cleaner water, separated from the solid particles, and it is a step closer to being safe and clean for consumption or use.