What are the chemicals used in Effluent treatment plants?
Effluent treatment is crucial for all industries, both personally and environmentally. These treatment facilities employ sophisticated procedures that entail the use of various chemicals, to treat spent water in order to remove pollutants, toxins, and other organic components from the water, and safely return it to the environment.
Effluent treatment plants employ a variety of procedures, including biological and chemical processing, which necessitate the use of various chemicals to clean the water and balance the pH level.
Method of Coagulation and Flocculation
If the microscopic sediment particles are too small to be captured even with the appropriate size filter, we may need to coagulate and flocculate them first, using coagulation and flocculation chemicals. As a result, inorganic coagulants are commonly used.
Inorganic coagulants include iron and aluminium salts. Alum, ferric chloride, ferric sulfate, and other compounds of a similar kind can be used.
However, when organic and inorganic coagulants are combined, both forms of coagulant can be more beneficial at times, and people will occasionally use both inorganic and organic coagulants together.
Dissolved metal ion chemical co-precipitation
To eliminate dissolved metal ions, chemical precipitation processes are performed.
When the pH is raised to the alkaline range, the solubility of these metal ions reduces considerably. When the pH is raised to approximately 10, the solubility of nickel, which is more than 100 milligrams per litre at neutral pH or around 7 or 8, drops to less than 0.001 milligrams per litre, or 1 microgram per litre.
These metals precipitate as metal hydroxides when their solubility declines. That is why, copper has a solubility of fewer than 0.1 micrograms per litre at pH-9. As a result, lowering the pH enhances solubility for most metals. When the pH is raised by adding lime or other similar substances, these metals precipitate in the form of their hydroxides.
Therefore, we can eliminate these compounds by simple chemical precipitation. The process can reduce the concentrations of copper, nickel, iron, and many other metals.
Process of advanced oxidation
There are additional advanced oxidation procedures that target the removal of specific chemicals, with stronger chemical stability or poor biodegradability.
Adsorption is a method of removing or phasing them out, but advanced oxidation procedures allow them to be decomposed and degraded to harmless components; nevertheless, these advanced oxidation processes (AOP) are energy expensive. As a result, these molecules with limited biodegradability and a complicated structure, are attempting to be totally mineralized.
If we need to eliminate pathogens from secondary treated effluent, without presumably going for different other things, we may employ some of the traditional disinfection procedures for treating water, and disinfecting the water by chlorination, ozonation, and UV radiation, among other things.
Disinfectants that are commonly used include-
- Cl2 gas
- Irradiation using ultraviolet light
How can we assist?
Netsol Water is a global leader in the delivery of different ETP chemicals required, for the smooth operation and maintenance of ETP facilities, based on pollution control parameters. We provide a diverse variety of chemicals for sectors such as food, beverage, metal treatment, oil field, construction, mining, textile, pulp and paper, sugar, manufacturing, dyeing unit, hotels and resort waste, automobile, pharmaceutical, processing, agriculture, and so on.
We back up our chemicals and systems with extensive field expertise, and a thorough understanding of how each treatment will affect your operation. Our experts will implement the best system and chemical solutions, to ensure optimal dependability and performance.