translate English to French: The most common treatment train using alum is conventional surface water treatment, which involves chemical addition, flocculation, coagulation, sedimentation and filtration.
Le processus de traitement le plus courant qui utilise l’alun est le traitement conventionnel des eaux de surface, qui implique l’addition de la substance chimique, la floculation, la coagulation, la sédimentation et la filtration.