| 摘要 |
The invention relates to the technology for treatment of sludge of municipal waste water and wastes of chemical industry with removal of heavy metals using hydrogen sulphide. A process for the treatment of organic wastes with removal of heavy metals is proposed, in which organic wastes and additive with inorganic sulphur-containing compounds are given to anaerobic fermentation with biogas formation, containing hydrogen sulphide, which is used for further settling of heavy metals as insoluble sulphides and fermented mixture is divided to solid and liquid fractions, additionally as additive, containing inorganic sulphur-containing compounds inorganic partially soluble wastes of chemical industry are used, relating to slightly safe substances of IV class of hazard, mixed before anaerobic fermentation with organic wastes to prepare homogenous and stabilized mixture in a ratio providing the transition of partially soluble sulphates to the solution in concentration of at least 1 gram of ions of sulphur compounds to liter of sludge, and anaerobic fermentation is carried out in mesophilic regime. |
