METHOD OF PREPARATION WASTE WATER FROM PIG-BREEDING COMPLEXES AND FARMS FOR AGRICULTURAL USE

摘要

FIELD: agriculture. ^ SUBSTANCE: method consists in consecutive introduction of alkaline coagulant till 10-11.5 and acidating agent till 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 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