METHOD FOR PREPARATION OF LIQUID WASTES OF CATTLE-BREEDING COMPLEXES FOR AGRICULTURAL USE Russian patent published in 2020 - IPC C02F1/58 C02F1/52 C02F1/66 C02F103/20 

FIELD: agriculture.

SUBSTANCE: invention relates to waste water purification and utilization, in particular, to a method for preparation of liquid wastes of cattle-breeding complexes for agricultural use. Invention is aimed at creating a technical solution (method) capable of considerably simplifying the process of preparing a reagent, reducing the cost of reagent preparation of waste water for agricultural use, improving efficiency of separation into liquid and solid fractions and ensuring high deodorisation effect with reduction of settling time, improving physical properties of obtained solid fraction and excluding content of heavy metals in it. Technical result is achieved due to that in liquid wastes of pig complexes and pig farms for agricultural use, an alkaline coagulant - lime milk or suspension of calcium carbide sludge or mixture of lime milk and calcium carbide sludge to pH 10–12 and acidifying reagent to pH 7.5–9.0 with separation of formed sediment.

EFFECT: technical result is obtaining organomineral fertilizer with high concentrations of biogenic components and exclusion of toxic effect of the obtained product, and therefore wider field of use thereof.

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