| 摘要 |
FIELD: waste water treatment. ^ SUBSTANCE: invention relates to technology of treating waste waters polluted with suspended stone particles and ensures obtaining product that can be used as coagulant. In a waste water treatment process including coagulation and precipitation of suspended materials, part of settled stone slurry is separated , mixed with phosphoric acid and/or its soluble salts on the basis of 5-10 kg per 100 L stone slurry, kept until gas evolution ends, and thus obtained product is placed in water being treated in amount 1-3 ml per 1 L water. ^ EFFECT: accelerated precipitation of suspended stone particles and simplified process. ^ 2 tbl, 32 ex |
