| 摘要 |
Invention belongs to the domain of wastewater rendering harmless and may be used for simultaneous rendering harmless galvanic shops waste and expired photographic developer. Method of rendering harmless wastewater containing ions of hard metals includes introduction of alkali reagent, mixing and separation of fallen sediments. New is the fact, that expired photographic developer solution is used as alkali reagent, and before mixing with afore mentioned developer solution into being treated wastewater there is put a material, that forms complex compounds with tensides present in the developer solution, then it is being stirred up to solution overall pH 9.2-9.8. |
