METHOD OF PREPARING LIVESTOCK-BREEDING COMPLEXES WASTE WATER FOR AGRICULTURAL USE Russian patent published in 2019 - IPC C02F1/52 C02F1/66 C05F3/00 C02F103/20 

FIELD: water supply; sewerage.

SUBSTANCE: invention relates to utilization of waste water of livestock complexes and can be used in agriculture for preparation of liquid wastes of cattle-breeding complexes and farms for irrigation and fertilization of agricultural lands. In order to implement the method alkaline coagulant - lime milk or suspension of calcium carbide sludge or a mixture of lime milk and calcium carbide slime to pH = 10–12 and an acidifying reagent to pH = 6.5–8.0 are introduced into the waste water with separation of the formed sediment. Nitrifying agent is represented by nitrofosca solution in the following ratio of components (g/dm³): lime milk in conversion to CaO - 1.2–1.5 or slurry of calcium carbide in terms of CaO - 2.0–3.0 or mixture of lime milk and slurry of calcium carbide, respectively, with respect to 0.5–1:1–2.5, nitrofosca in terms of P₂O₅ - 0.8–2.0.

EFFECT: invention provides simplification of the method, higher degree of reagent use and deodorisation effect, which reduces atmosphere pollution.

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