| 摘要 |
A water treatment process for waste water containing sugar or alcohol, with an ethanol content of 0.1-100 g/l, comprises: (1) separating by distillation at least one part of the volatile components of the waste water; and (2) extracting at least one part of the mineral or organic residues by evaporation of the waste water. A water treatment process for waste water containing sugar or alcohol, with an ethanol content of 0.1-100 g/l, comprises: (1) separating by distillation at least one part of the volatile components of the waste water producing an ethanol based residue, which is condensed to recover it in the liquid phase; and (2) extracting at least one part of the mineral or organic residues by evaporation of the waste water, to maintain the COD (chemical oxygen demand) of the treated water at up to 0.5 g/l. An Independent claim is also included for an apparatus for treating waste water containing sugar or alcohol, with an ethanol content of 0.1-100 g/l, comprising a distillation column (6) for separating one part of the volatile components of the waste water, a condenser for recovering the volatile components, a collector for the liquid volatile components, an evaporator (8), connected to the distillation column (6), for extracting at least one part of the low volatile residues (mainly organic) in the waste water. |
