METHOD FOR PREPARATION OF STOCK-RAISING SEWAGE WATER FOR AGRICULTURAL USE

摘要

FIELD: agriculture. ^ SUBSTANCE: in order to realise method, alkaline coagulant and oxidising reagent are serially introduced until pH of 6.5-8.5 with release of produced residue. Preparation is carried out in two stages in vortex sheet devices with movable ferromagnetic particles. Simultaneously treatment is carried out with alkaline coagulant until pH of 10-11.5 in the first device of vortex sheet with magnetic induction of 0.1-0.13 tesla and with oxidising reagent in the second device of vortex sheet with magnetic induction of 0.17-0.25 tesla. Alkaline coagulant used is 10% suspension of calcium carbine sludge in amount of 0.5-2.0 g/dm3 or 10% lime milk in amount of 0.1-1.0 g/dm3. Oxidising reagent used is mixture of calcium sulfate dihydrate suspension with orthophosphoric acid in ratio of volume of 500:1 in amount of 6.0-15.0 g/dm3. After treatment with reagents and participation of vortex sheet with movable ferromagnetic particles, waste water is sent to unit of thin-layer sedimentation, and disinfected residue is produced - organic mineral fertiliser. ^ EFFECT: complete disinfection of waste water in stock-raising farms. ^ 1 dwg, 4 tbl, 4 ex