Tertiary treatment separates the floating and colloidal substances that may remain after the primary or secondary treatment.
Marel Water Treatment provides various techniques to remove the remaining dirt:
During precipitation, dissolved inorganic substances precipitate with the help of chemical reactions. For example, for the removal of phosphates and sulphides using ferrous and/or aluminium oxides.
Persistent pollutants can be broken down, rendered harmless or changed into an easily biodegradable or easily removable substance by strong oxidants.
Certain substances can be removed through adsorption with activated carbon.
- Ion exchange
Harmful ions that are difficult to remove are replaced by harmless ions. The ion exchanger becomes saturated after a period of time. After cleaning, a concentrated solution with the harmful ions will stay behind.
Disinfection is the destruction or inactivation of pathogenic organisms. Disinfection can take place by physical or chemical means. This involves using agents that cause oxidation, such as chlorines, or exposure to ultraviolet light.