Industrial wastewater from most industries do not meet the effluent standard without dosing It is a necessity for the wastewater to be removed from all toxic components before discharging it.
Dosing of chemicals can have several reasons:
- Nutrients removing (P) by precipitation
- Heavy metals removing (sulfurous, hydroxides etc)
- Combined process (disinfection ,Fenton, oxidation)
- pH adjusting
The chemicals are then in a bond with the solids or elements which are unwanted in the effluent. In the most applications the solids have then to be removed with the chemicals.
To decide which treatment technology should be used in a project, our specialists from ClearFox look at how big the particles in the wastewater are. For solids that are visible to the naked-eye we use techniques such as DAF (Dissolved Air Flotation) or Lamella Clarifier.
For smaller particles which are called suspended solids (size < 1 µm) or colloids, all these methods are not working. For this we need Physico-Chemical pre-treatment.
How it works:
Basically we add chemicals such as coagulants and flocculants which makes the small particles remain in an indefinitely stable form resulting in them forming into bigger particles that can be treated with our normal methods.