| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: invention can be used in mining industry during transportation, benefication and procurement metallic ore and mining metal ore. The method involves the following stages: a) at the first treatment step (I), hydrogen sulphide is passed through waste water and heavy metals contained in the waste water are removed in form of sulphides, b) at the second treatment step (II), calcium sulphate is precipitated from waste water, c) calcium sulphate from the second treatment step (II) is removed and part of the calcium sulphate is taken for a third treatment step (III), where sulphate is converted to hydrogen sulphide using sulphate-reducing bacteria, d) hydrogen sulphide formed at the third treatment step is returned to treatment step (I). In the preferred version, calcium aluminate is used to precipitate sulphates. ^ EFFECT: method simplifies the process of treating waste water and recycling the formed residues. ^ 4 cl, 1 dwg |
