Physicochemical purification of effluents from preliminary oil separators

Z 6 Physicochemical purification of effluents from preliminary oil separators 

This purification process is the intermediate phase between preliminary oil removal (API or lamella separators) and biological purification. 

It involves flocculation of these effluents by chemicals and solid-liquid physical separation of the sludge produced by flocculation. 

For many years, this purification process was carried out in three stages, by analogy with river water clarification  

As far back as the 1970s, dissolved air flotation (DAF) was mastered and organic coagulants became available on the market. This modified and simplified flotation conditions  

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