METHOD FOR PREPARATION OF LIQUID WASTES OF PIG COMPLEXES FOR AGRICULTURAL USE Russian patent published in 2020 - IPC C02F1/52 

FIELD: cleaning and recycling liquid wastes.

SUBSTANCE: invention relates to purification and utilization of liquid wastes, in particular, to a method for preparation of liquid wastes of pig complexes for agricultural use. Method for preparation of liquid wastes of pig complexes for agricultural use includes sequential introduction of alkaline coagulant and acidifying reagent to pH = 6.5–8.0 with separation of formed precipitate, as an alkaline coagulant to pH 12–13 is used a suspension of defecation lime sugar production or suspension defecate sugar production in the following ratio of components (g/dm³): acidifying reagent – ammophos solution in terms of P₂O₅ – 0.5–1.5; suspension of defecation lime of sugar production in terms of CaO – 0.5–1.0; or suspension defecation of sugar production in terms of CaO – 0.3–1.0.

EFFECT: technical result is preparation of liquid wastes of pig complexes for utilization of sugar production wastes in agriculture.

1 cl, 1 ex, 1 tbl