Chemical neutralization is the adjustment of the pH value by the addition of acidic or alkaline chemicals. For this purpose, alkalis, such as, for example, sodium hydroxide solution or milk of lime and / or acids, such as, for example, hydrochloric acid, sulfuric acids or carbonic acid, are metered continuously into the water and mixed into a mixing container by means of a static mixer in the pipeline or agitator, in order to be able to ensure rapid and complete mixing.
Often, the neutralization is also carried out in combination with precipitation, flocculation and separation of heavy metals or other water constituents, such as, for example, phosphate or fluoride.
Neutralization systems can be designed both as continuous systems and as batch treatment systems.
- Setting the pH value
- Precipitation of heavy metals
- Precipitation of phosphate and fluoride
- in combination with the oxidation of nitrite or cyanide
- in combination with the reduction of chromate
Continuous neutralization and fluoride removal, 20 m3/h