What is the jelly-like substance formed during the coagulation process?

The jelly-like substance formed during the coagulation process is referred to as "floe." Coagulation in water treatment involves the addition of certain chemicals, known as coagulants, which help to aggregate suspended particles into larger clumps. As these particles combine, they form a gel-like substance that can float or settle in the treatment system, which is typically called floe. This process allows for more efficient removal of impurities from the water, as the floe can be removed or filtered out more easily than individual particles.

In contrast, scum generally refers to the floating debris or films that can appear on the surface of water, often composed of oils, fats, or organic matter. Sledge, on the other hand, typically refers to the settled solids at the bottom of a treatment tank, often consisting of the waste products of the treatment process. Alum is a common coagulant used in water treatment, but it is not the jelly-like substance itself; rather, it is a chemical that facilitates the coagulation process, leading to the formation of floe.