Division 1.21.2 Waste water treatment
United Kingdom
| X1Technique | Description |
|---|---|
| Removal of insoluble substances by recovering oil. | These techniques generally include:
|
| Removal of insoluble substances by recovering suspended solid and dispersed oil | These techniques generally include:
|
| Removal of soluble substances including biological treatment and clarification | Biological treatment techniques may include:
One of the most commonly used suspended bed system in refineries WWTP is the activated sludge process. Fixed bed systems may include a biofilter or trickling filter |
| Additional treatment step | A specific waste water treatment intended to complement the previous treatment steps e.g. for further reducing nitrogen or carbon compounds. Generally used where specific local requirements for water preservation exist. |