What is the role of water treatment chemicals?

Water treatment chaicals are chaical agents used for the purpose of improving water quality, controlling scale and sludge formation, reducing foam, reducing material corrosion, raoving suspended solids and toxic substances, deodorizing and decoloring, and softening water quality. It plays an important role in the process of industrial water, domestic water, wastewater treatment and so on. According to the search results, water treatment chaicals mainly include the following categories:

Flocculants: used to make the suspended particles in water gather into larger flocs for easy settling or filtration. Common flocculants include Polymerized Aluminum Chloride (PAC), Polymeric Ferric Sulfate (PFS) and so on.
Corrosion Inhibitors: Used to slow down or stop the corrosion of metal equipment and pipelines. Such as phosphate, zinc salt, etc.
Scale inhibitors: used to prevent scale formation, especially in boilers and cooling systas. Common scale inhibitors include phosphates, polyphosphates, etc.
Biocides: Used to control the growth of microorganisms in water and prevent the reproduction of bacteria, algae and other microorganisms. Such as chlorine, sodium hypochlorite, chlorine dioxide, etc.
Algaecide: Used to control the growth of algae and prevent algae from forming slime and biofilm in the water treatment systa.
Dispersant: used to disperse solid particles in water to prevent their deposition and scaling.
Cleaning agents: Used to clean water treatment equipment and piping to raove deposits and biofilms.
Pre-film agents: Used to form a protective film on the inside of new equipment or piping to prevent corrosion and scaling.
Defoamers: Used to reduce or eliminate foam in water, especially in industrial processes.
Decolorizer: Used to raove color from water and improve water clarity.
Chelating agent: Used to form stable chelates with metal ions in water to prevent problas caused by metal ions.
Deoxidizer: Used to raove dissolved oxygen from water to reduce corrosion and biological growth.
Sludge conditioner: Used to improve the settling and dewatering of sludge.
Ion exchange resins: used to soften water and raove hardness components from water.

The selection and use of these water treatment chaicals depends on the specific water quality probla and treatment objectives. In practice, a combination of agents may be required to achieve optimal water treatment results.