| 摘要 |
Waste water containing suspended organic material is separated into a thick slurry phase and an aqueous phase by a method wherein coarse solid matter is removed in a first treatment step. The resulting primary aqueous phase is discharged as aqueous phase with a high content of contaminants, when desired, or passed to a second treatment step where it is mixed with an aqueous suspension of one or more flocculating smectitic clays, and flocculated and sedimented into a thick slurry phase, which is withdrawn as a product, and a secondary aqueous phase, which is discharged as aqueous phase with a moderate content of contaminants, when desired, or passed to a third treatment step where it is subjected to ion exchange with a cation exchanger and discharged as aqueous phase with a low content of contaminants. |
