| 摘要 |
The invention relates to a method and apparatus for re- moving sulphate, calcium and/or soluble metals from waste water, which method comprises the following steps a) a gypsum precipitation step b) an ettringite precipitation step,c) a first separation step, d) a neutralisation step, and e) a second separation step in order to obtain water having a reduced sulphate, calcium and/or soluble metals content. The waste water is process water, effluent or sulphate-containing water, such as mine water, recycle water from concentrator or discharge water from concentrator. |
