FIELD: agriculture.
SUBSTANCE: method consists in consecutive introduction of alkaline coagulant till рН 10-11.5 and acidating agent till рН 6.5-8.5 with separation of sediment. Mixture of calcium sulfate dihydrate suspension with orthophosphoric acid is used as an acidating agent with the following reagent doses, g/dm3: calcium carbide slime suspension recalculated for СаО 1.0- 3.0,mixture of calcium sulfate dihydrate suspension with orthophosphoric acid in proportion 500:1.
EFFECT: reagent preparation process becomes simpler; cost of waste water reagent preparation decreases; agricultural land improvement value of the obtained fraction increases with the decrease of settling time and the acidating agent active material content increases.
1 tbl, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR TREATING SEWAGE WATER OF COMMERCIAL PIG UNITS AND FARMS FOR AGRICULTURAL UTILIZATION | 2006 |
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| PREPARATION OF UNDERWASHING WASTE PRODUCTS OF PIG-BREEDING COMPLEXES AND FARMS FOR AGRICULTURAL APPLICATIONS | 2017 |
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| PREPARATION OF LIQUID WASTES OF PIG-BREEDING FARMS FOR AGRICULTURAL APPLICATIONS | 2013 |
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| METHOD OF TREATING WASTE WATERS FROM CATTLE-BREEDING FARMS FOR AGRICULTURAL USE | 2003 |
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