| 摘要 |
FIELD: waste water treatment in agriculture. ^ SUBSTANCE: invention relates to utilization of cattle-breeding farm waste waters for irrigation and fertilization of agricultural areas. Method is implemented by first adding calcium oxide-containing alkaline coagulant, 1.0-3.0 g/dm3, and then adding acidifying reagent to pH 6.5-8.5 resulting in formation of precipitate, said alkaline coagulant being acetylene production waste, namely suspension of calcium carbide slime or 1:2 mixture of lime milk with calcium carbide slime suspension, and said acidifying reagent being suspension of simple or double superphosphate, respectively 3.0-6.0 and 1.0-3.0 g/dm3 (calculated as P2O5). ^ EFFECT: substantially simplified reagent preparation procedure, reduced expenses on waste water treatment, and enhanced agricultural value of produced fractions. ^ 2 tbl |
