What is the name of the sticky gelatinous precipitate that is formed in the primary treatment process and carries away suspended dirt particles and bacteria?

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The sticky gelatinous precipitate that carries away suspended dirt particles and bacteria in the primary treatment process is called aluminum hydroxide. Calcium sulfate and calcium hydroxide are commonly referred to as lime, which is sometimes used in the wastewater treatment process for pH adjustment and precipitation of certain contaminants. Aluminum sulfate is a coagulant that is commonly used in wastewater treatment to help remove suspended solids and phosphorus. However, it does not form a sticky gelatinous precipitate like aluminum hydroxide.

What Is the Name of the Sticky Gelatinous Precipitate That